[
  {
    "article_id": 298,
    "article_title": "Influenza",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a child presenting during influenza season with sudden fever, myalgia, headache, and respiratory symptoms, influenza is considered regardless of vaccination status, and presentation is recognized to look quite different by age - a nonspecific sepsis-like picture in infants, or otitis media, croup, [[3|bronchiolitis]], or pneumonia rather than a classic influenza syndrome in young children. Influenza pneumonia, [[100|myocarditis]], and influenza-associated encephalopathy are kept on the differential for any child with unexpectedly severe respiratory, cardiac, or neurologic findings during an influenza illness."
      },
      {
        "title": "Diagnosis",
        "content": "If diagnostic confirmation will change management (e.g., antiviral decision-making in a high-risk or hospitalized patient), a rapid antigen test or molecular assay from a nasal swab/wash is obtained within the first 3 days of symptoms, since test sensitivity falls as viral load declines after that window - viral culture or serology are not relied upon for real-time decisions."
      },
      {
        "title": "Management",
        "content": "Most children are managed with supportive care (fluids, rest), with improvement anticipated by 48-72 hours; if fever recurs, is prolonged, or the child clinically deteriorates instead of improving on this timeline, evaluation for bacterial superinfection is undertaken and treatment with antibiotics is given if confirmed or strongly suspected. Antiviral treatment is prioritized for children at higher risk for complications, notably those younger than 2 years of age. Because children shed virus longer and at higher titers than adults (up to 10+ days in young or immunocompromised children), families are counseled on continued infection-control precautions (hand hygiene, staying home) beyond the point symptoms improve, not just during the acute febrile period."
      }
    ]
  },
  {
    "article_id": 299,
    "article_title": "Intraventricular Hemorrhage",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Clinical signs of a larger hemorrhage in a preterm infant are watched for - sudden deterioration, unexplained anemia, new seizures, tense or bulging fontanels, split/widened sutures, new apnea/bradycardia with desaturation, poor perfusion, hypotension, worsening [[387|metabolic acidosis]], or rising oxygen/ventilator requirements - prompting urgent cranial ultrasound if these develop. Because up to 90% of hemorrhages occur within the first 72 hours of life and most are clinically silent, clinical signs alone are not relied upon in the highest-risk population - any infant born before 31 weeks' gestation or weighing less than 1,500 g - given the 15-25% incidence of GMH/IVH in this group, with the highest risk in infants born before 26 weeks."
      },
      {
        "title": "Diagnosis",
        "content": "A screening cranial ultrasound is obtained according to unit protocol rather than waiting for symptoms, with imaging repeated over the first week given that about 20% of early hemorrhages progress to greater severity during this window. When a hemorrhage is identified, it is graded using the standard I-IV system to guide prognostic counseling and follow-up intensity, with grade IV findings (parenchymal extension) understood to reflect periventricular hemorrhagic infarction from venous obstruction rather than simple IVH extension, carrying a correspondingly worse prognosis."
      },
      {
        "title": "Management",
        "content": "Serial ultrasound surveillance for posthemorrhagic ventricular dilation is continued after any grade II or higher hemorrhage, and long-term neurodevelopmental follow-up is coordinated proportional to hemorrhage severity, since both mortality and neurologic sequelae increase substantially with higher grades and lower birthweight. Modifiable perinatal contributors are addressed where possible - avoiding blood pressure fluctuations, hypocapnia/hypercapnia, and hypoxemia during ventilatory management - since these are recognized associations with GMH/IVH risk."
      }
    ]
  },
  {
    "article_id": 300,
    "article_title": "Lead Poisoning",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Because most children with lead toxicity are asymptomatic, screening is relied upon rather than waiting for symptoms - a blood lead level is checked in any child with recognized risk factors (older housing with lead paint, relevant parental/household occupational exposure, imported ceramics/jewelry/remedies, pica behavior, or iron deficiency), and local/CDC screening recommendations are followed given that a majority of at-risk children nationally are not currently being screened. Encephalopathy - seizures, altered mental status, or signs of raised intracranial pressure - is watched for in any child with an elevated BLL, since this represents a medical emergency regardless of the specific level, and asymptomatic children with a very high BLL (especially over 100 mcg/dL) are treated as being at significant CNS risk needing urgent treatment even without overt symptoms."
      },
      {
        "title": "Diagnosis",
        "content": "Any measurable BLL is technically abnormal; levels above 10 mcg/dL are treated as clinically significant and levels above 5 mcg/dL as warranting attention and follow-up."
      },
      {
        "title": "Management",
        "content": "For a child with an elevated BLL, the essential first step is removing the child from the lead source - the home environment is identified and remediated before or alongside any pharmacologic treatment. Chelation is not given for BLL under 45 mcg/dL. For BLL at or above that threshold, or for any symptomatic child, hospital admission is arranged for full evaluation, decontamination planning, and chelation therapy; care is escalated to PICU level with IM dimercaprol (BAL) followed by IV calcium disodium EDTA plus aggressive supportive care for any child needing this emergency level of care for lead encephalopathy. After treatment is started, expectations are set with families that BLL falls fastest in the first 2 months but that full normalization, especially from a markedly elevated starting point, may take years even with complete source elimination - so continued monitoring and reinforcement of environmental remediation matters well beyond the initial hospitalization."
      }
    ]
  },
  {
    "article_id": 301,
    "article_title": "Infantile Spasms",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "When a caregiver describes clusters of brief, stereotyped flexion or extension movements of the neck, trunk, and limbs — especially occurring around sleep transitions, with crying between events and any accompanying developmental regression — this is not dismissed as colic, reflux, or a benign startle. Infantile spasms are distinguished from benign look-alikes using the presence or absence of behavioral arrest and developmental regression: Sandifer syndrome is tied consistently to feeding, benign paroxysmal vertigo and infantile shuddering do not impair responsiveness, and the infantile gratification phenomenon stops with distraction — none of these produce the loss of responsiveness characteristic of a true spasm."
      },
      {
        "title": "Diagnosis",
        "content": "An urgent EEG is obtained to look for hypsarrhythmia. MRI of the brain and metabolic/genetic testing are pursued in parallel to identify a treatable underlying cause (e.g., tuberous sclerosis, a structural malformation, a metabolic disorder), since roughly 70–80% of affected children have an abnormal MRI and identifying the cause both guides treatment and informs the family about developmental prognosis (children with an identified underlying cause carry a higher risk of developmental impairment than cryptogenic cases)."
      },
      {
        "title": "Management",
        "content": "Prompt referral is made to [[119|pediatric neurology]], since treatment initiated early has the potential to improve long-term developmental outcome."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are counseled that West syndrome (the triad of spasms, hypsarrhythmia, and developmental delay/regression) carries a guarded prognosis and that over half of affected children develop other [[206|epilepsy]] types later, including in some cases progression to Lennox-Gastaut syndrome, so ongoing neurologic follow-up after the acute spasms are controlled remains important even if the spasms themselves respond to treatment."
      }
    ]
  },
  {
    "article_id": 302,
    "article_title": "Intestinal Obstruction",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "The vomiting pattern and abdominal exam are used to localize the obstruction before imaging confirms it: nonbilious vomiting with a scaphoid abdomen points to a proximal, preduodenal process, while bilious vomiting with a distended abdomen points to a more distal obstruction; maternal polyhydramnios is asked about in the neonatal history, since this also favors a proximal lesion. In any neonate who has not passed meconium within 24–48 hours of birth, or who has [[144|feeding intolerance]], distention, persistent vomiting, or is aspirating more than 20 mL of gastric contents, prompt evaluation for intestinal obstruction with directed imaging is pursued rather than watchful waiting. Intussusception is considered urgently in any infant with intermittent severe abdominal pain, vomiting, and lethargy, since delayed reduction risks strangulation, ischemia, and necrosis, and the condition is fatal if left untreated."
      },
      {
        "title": "Diagnosis",
        "content": "If a child presents with a longstanding history of alternating constipation/diarrhea, abdominal distention, and no demonstrable mechanical blockage on imaging, chronic intestinal pseudo-obstruction is considered, with evaluation for coexisting bladder dysfunction and bacterial overgrowth as part of the workup."
      },
      {
        "title": "Management",
        "content": "In an older child with a prior abdominal surgery presenting with obstructive symptoms, nasogastric decompression is started first for suspected adhesive obstruction, since this can resolve symptoms and prevent progression; if the obstruction does not begin to resolve promptly, emergency surgical exploration follows rather than prolonging conservative management. In a patient with cystic fibrosis and new obstructive symptoms, management is escalated stepwise: pancreatic enzymes are continued or increased and polyethylene glycol is added for intermittent symptoms, large-volume PEG bowel lavage (oral or NG) follows if this fails, and a therapeutic contrast enema with concurrent large-volume IV fluids is reserved for complete obstruction. For any child with severe fecal impaction, milk-and-molasses, soap suds, or tap water enemas are avoided given documented serious adverse events, and surgical disimpaction is considered if impaction is severe and unresponsive to safer measures."
      }
    ]
  },
  {
    "article_id": 303,
    "article_title": "Juvenile Idiopathic Arthritis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "When a child presents with joint pain/swelling and a morning-predominant pattern of pain or stiffness lasting more than 6 weeks, JIA is evaluated for systematically: the joint count and pattern are characterized (oligoarticular ≤4 joints vs. polyarticular ≥5 joints), the tempo of onset is noted (insidious vs. rapid), and systemic features (fever, rash, hepatosplenomegaly, lymphadenopathy, serositis) are looked for specifically, since these would point toward systemic JIA rather than one of the other subtypes. Acute phase reactants are watched over time in any child with established JIA, particularly systemic JIA — a relative fall in previously elevated inflammatory markers is a red flag for macrophage activation syndrome rather than reassuring improvement."
      },
      {
        "title": "Diagnosis",
        "content": "ANA and RF are neither required nor sufficient for diagnosis — they are ordered to help refine subtype and guide uveitis screening, not to rule JIA in or out. If fever is prominent, systemic JIA is not assumed prematurely: it is treated as a diagnosis of exclusion, with a thorough infectious and oncologic workup pursued before confirming, and most other JIA subtypes should not be associated with fever, so its presence should specifically raise or lower suspicion for the systemic subtype."
      },
      {
        "title": "Management",
        "content": "Asymptomatic anterior uveitis is screened for on the schedule appropriate to the child's ANA status and age at diagnosis, since this complication frequently causes no symptoms until vision is already threatened. Leg-length discrepancy and muscle atrophy are assessed for and documented at follow-up visits, since these indicate an established, chronic disease process needing more aggressive management, and functional impact is addressed directly — handwriting difficulty, morning limp, and any regression of gross motor skills are asked about, since these are practical markers of disease impact on daily life and school. Referral to [[221|pediatric rheumatology]] is made early, since earlier treatment improves both time to remission and overall rate of achieving remission, and delayed referral increases morbidity related to growth, development, and pain."
      }
    ]
  },
  {
    "article_id": 304,
    "article_title": "Milk Protein Allergy",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In an infant with blood-streaked stools, [[354|chronic diarrhea]], or repetitive vomiting, first determine whether the pattern suggests IgE-mediated allergy (immediate symptoms within minutes - urticaria, facial swelling, vomiting, shock-like state) versus a non-IgE, GI-predominant presentation (painless hematochezia in an otherwise well infant, or chronic diarrhea with occult blood, protein loss, and peripheral eosinophilia)."
      },
      {
        "title": "Diagnosis",
        "content": "For suspected IgE-mediated allergy, skin-prick testing or specific IgE levels can support the diagnosis, with a negative test making IgE-mediated allergy unlikely. For suspected non-IgE disease, skin testing is skipped (it is not reliable here) and a trial of complete milk protein elimination is proceeded to directly."
      },
      {
        "title": "Management",
        "content": "The elimination algorithm is followed stepwise: milk/milk products are eliminated first and reassessed; if unresolved, compliance is checked and hidden bovine milk sources are ruled out, then soy is eliminated as well given the high concurrence rate; if still unresolved, egg, peanut, and fish are removed (considering multiple food protein allergy); if there is still no response, an extensively hydrolyzed or elemental formula/diet is moved to. If a child responds, the milk-free diet is maintained for about a year before a carefully supervised reintroduction, with elimination resumed if symptoms recur. If a child fails to respond despite this full elimination ladder, restriction is not escalated indefinitely - referral to a specialist is made and alternative diagnoses such as [[122|immunodeficiency]], [[254|inflammatory bowel disease]], or [[152|tuberculosis]] are reconsidered, with repeat endoscopy and small bowel imaging as part of that re-evaluation. For any child with anaphylactic-type reactions, the family is equipped with an epinephrine autoinjector and a medical alert bracelet before they leave the visit."
      }
    ]
  },
  {
    "article_id": 305,
    "article_title": "Neonatal Herpes Simplex",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "A high index of suspicion for neonatal HSV is maintained in any febrile neonate under 28 days old, even in the absence of a maternal history of genital herpes - most mothers of affected infants have no relevant history, since primary maternal infection is frequently asymptomatic. Cerebrospinal fluid pleocytosis, elevated liver transaminases, or coagulopathy are looked for specifically in a septic-appearing neonate, since these findings should raise HSV alongside standard bacterial sepsis/meningitis considerations, and vesicular skin lesions - while highly suggestive when present - are absent in half to two-thirds of cases, so their absence should not lower suspicion."
      },
      {
        "title": "Diagnosis",
        "content": "When HSV is suspected, CSF is sent for HSV PCR (the most sensitive test for CNS disease), surface/vesicle cultures or direct fluorescent antibody staining are obtained if lesions are present, and the Tzanck smear or serologic antibody testing are not relied upon, as these are unhelpful in this setting."
      },
      {
        "title": "Management",
        "content": "Given the time-sensitivity of outcomes, empiric intravenous acyclovir is started promptly whenever clinical suspicion is significant, rather than waiting for confirmatory testing, since early treatment initiation is the strongest lever available for reducing mortality and morbidity."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families of survivors are counseled that recurrent skin lesions are common (about 50%) in the weeks after completing the initial IV acyclovir course, and close follow-up is arranged, particularly after CNS disease, given the risk of long-term neurodevelopmental sequelae."
      }
    ]
  },
  {
    "article_id": 306,
    "article_title": "Osteosarcoma",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In an adolescent with persistent bone pain - especially pain that wakes them at night, is worsened by activity, or is accompanied by a palpable mass near the knee or proximal humerus - a sports injury or sprain is not assumed, particularly if symptoms fail to improve with a reasonable trial of conservative therapy (rest, activity modification) over a few weeks."
      },
      {
        "title": "Diagnosis",
        "content": "A plain radiograph is ordered as the first-line imaging study; if it shows a mixed lytic/sclerotic lesion with cortical destruction, an irregular tumor-bone margin, or a periosteal reaction (Codman triangle, sunburst pattern), MRI is obtained and prompt referral is made to [[192|pediatric oncology]] rather than pursuing extended conservative management, since routine labs are typically normal and cannot be used to reassure against malignancy. Once osteosarcoma is suspected, percutaneous core-needle biopsy is arranged with careful planning of the needle tract in coordination with the surgical team, since the tract itself must later be resected during definitive surgery - poor planning here can worsen recurrence risk. While biopsy and staging are awaited, Ewing sarcoma and osteoid osteoma are kept on the differential: fever/weight loss and a diaphyseal or flat-bone lesion point toward Ewing sarcoma rather than osteosarcoma, while dramatic NSAID responsiveness and a small radiolucent nidus point toward benign osteoid osteoma."
      },
      {
        "title": "Management",
        "content": "Families are counseled that treatment will combine chemotherapy (typically including doxorubicin, with dexrazoxane considered to reduce cardiotoxicity) and surgical resection."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Presence of metastatic disease at diagnosis is the single most important prognostic factor, and survivors need long-term monitoring for musculoskeletal, cardiac, renal, and reproductive late effects of treatment."
      }
    ]
  },
  {
    "article_id": 307,
    "article_title": "Pancreatic Insufficiency",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In any child with cystic fibrosis, or with unexplained failure to thrive, [[354|chronic diarrhea]], steatorrhea, or fat-soluble vitamin deficiency, pancreatic insufficiency is considered. In a pancreas-sufficient CF patient who develops new abdominal pain, altered stool pattern, or growth faltering, re-testing for progression to pancreatic insufficiency is done rather than assuming their prior sufficiency status still holds."
      },
      {
        "title": "Diagnosis",
        "content": "A fecal elastase-1 level is checked as the standard first-line screening test - a level above 100 mcg/g essentially rules out pancreatic insufficiency (99% predictive value), but severe diarrhea can dilute stool and produce a falsely low result requiring cautious interpretation."
      },
      {
        "title": "Management",
        "content": "Once pancreatic insufficiency is confirmed, pancreatic enzyme replacement therapy is started with an enteric-coated product, dosed with every meal and snack and titrated to clinical response (using a 1:1 lipase ratio as a starting point if switching products). The diet is aimed at roughly 150% of normal caloric intake, with overnight gastrostomy feeding considered if oral intake cannot meet this target, and fat-soluble vitamin (A, D, E, K) supplementation is started given the near-universal need in this population. If the suspected etiology is chronic pancreatitis rather than CF, imaging (ultrasound/CT, then ERCP/MRCP as needed) is pursued to characterize ductal anatomy and structural complications, and coexisting endocrine insufficiency is screened for with fasting/postprandial glucose given the risk of diabetes developing over time. In a child with celiac disease or [[214|malnutrition]]-related pancreatic insufficiency, enzyme dependence may be expected to resolve with adequate nutritional rehabilitation rather than being lifelong, and periodic reassessment is done rather than assuming permanent PERT dependence in that specific context."
      }
    ]
  },
  {
    "article_id": 308,
    "article_title": "Migraine",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Neuroimaging and further workup are reserved for red flags rather than ordered routinely for a classic migraine history: neurologic abnormalities, altered mental status, or meningeal signs should prompt evaluation for meningitis; a thunderclap headache pattern should prompt evaluation for a ball-valve intracranial cyst, [[379|intracranial hemorrhage]], or RCVS (especially with a history of migraine, pregnancy, or relevant drug exposure); and a child with a right-to-left cardiac shunt, [[122|immunodeficiency]], chronic ENT infection, or penetrating head injury presenting with new or worsening headache should be evaluated for brain abscess. When aura is present, the tempo (slow march over minutes, resolving within 5–60 minutes) distinguishes it from stroke, and the acephalic migraine subtypes (familial hemiplegic migraine, basilar migraine, migraine aura without headache) are considered when a stroke-like presentation lacks headache."
      },
      {
        "title": "Diagnosis",
        "content": "A careful history is taken as the primary diagnostic tool, since migraine diagnosis rests almost entirely on history plus a normal exam rather than any test or scan. Family history of migraine, associated motion sickness or vertigo, headache duration and location, throbbing quality, and associated nausea/vomiting/photophobia/phonophobia are asked about specifically, and whether the pattern fits an episodic syndrome (cyclical vomiting, abdominal migraine, benign paroxysmal vertigo or torticollis) rather than a typical headache is noted, particularly in a younger child."
      },
      {
        "title": "Management",
        "content": "Coexisting anxiety, depression, and sleep disturbance are screened for and addressed as part of migraine management, since anxiety predicts migraine persistence and poor sleep can trigger migraine attacks — addressing sleep hygiene and [[94|mental health]] may reduce migraine frequency independent of headache-specific therapy."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are reassured that episodic childhood syndromes such as cyclical vomiting, abdominal migraine, and benign paroxysmal vertigo commonly evolve into typical [[217|migraine headache]] later, so a consistent family/personal history across these patterns supports the migraine diagnosis even when the current presentation doesn't look like a classic headache."
      }
    ]
  },
  {
    "article_id": 309,
    "article_title": "Muscle Contusion",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "When evaluating a suspected muscle contusion, the history is used first to exclude more serious injury: immediate swelling, deformity, numbness, give-way weakness, an audible pop, joint locking, or instability should redirect evaluation toward fracture or internal joint derangement rather than simple contusion management. The signs of myositis ossificans are watched for — disproportionate, escalating pain, warmth, and swelling with extreme tenderness on any movement of the adjacent joint — after a significant thigh or arm contusion, since this changes the management approach and prognosis timeline substantially. If the mechanism involved any blow to the head, neck, face, or body with subsequent headache, confusion, amnesia, dizziness, balance problems, or behavioral change, evaluation for [[200|concussion]] is warranted regardless of whether loss of consciousness occurred, and same-day return to play is not allowed, since symptoms can evolve over the following hours."
      },
      {
        "title": "Diagnosis",
        "content": "CT imaging is obtained only if there is deteriorating or altered mental status, prolonged loss of consciousness, repeated vomiting, severe headache, signs of skull fracture, a focal neurologic deficit, or a severe injury mechanism — CT is rarely needed beyond the first 24 hours for straightforward concussion."
      },
      {
        "title": "Management",
        "content": "For an uncomplicated contusion, rehabilitation is started immediately rather than simply prescribing rest: ice is applied for 20 minutes 3–4 times daily, compression is applied without compromising perfusion, the limb is elevated, NSAIDs or acetaminophen are used for pain control, and pain-free isometric and range-of-motion exercises are begun as soon as tolerated to prevent the deconditioning that comes from prolonged disuse. Exercise is avoided for the first 5–7 days, and local heat is reserved for after the acute swelling and tenderness phase has passed. For a quadriceps contusion specifically, management consists of ice and compression, with short-term crutches added for moderate-to-severe injuries, and a return to walking and activity as tolerated is allowed. For a hamstring injury, stretching and eccentric strengthening are prioritized in rehabilitation given the muscle's inherent two-joint vulnerability to reinjury."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are counseled that most concussions resolve within 7–10 days, while the minority who develop persistent postconcussion symptoms beyond 28 days are watched for, requiring more structured support for return to school and sport."
      }
    ]
  },
  {
    "article_id": 310,
    "article_title": "Nephrotic Syndrome",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a preschool-age child (2–6 years) presenting with edema, heavy proteinuria, hypoalbuminemia, and hyperlipidemia, with normal complement and no [[187|hematuria]]/hypertension, minimal change disease is the most likely diagnosis. Renal biopsy and closer secondary-cause workup are reserved for children outside this typical demographic — age over 12 years, sustained hypertension, significant hematuria, renal dysfunction, extrarenal symptoms (rash, arthralgias, fever), or depressed complement — since these features shift the differential toward FSGS, membranous nephropathy, MPGN, or a secondary cause such as SLE, IgA vasculitis nephritis, or a triggering infection or drug."
      },
      {
        "title": "Diagnosis",
        "content": "A corticosteroid trial is reasonable without upfront biopsy in the typical presentation, since more than 80% will respond. For a child whose presentation does not fit the classic MCD pattern, or who fails to respond to an appropriate steroid course, biopsy and a secondary-cause workup (infectious serologies, ANA/complement, medication history) are pursued rather than continuing empiric steroid therapy indefinitely, since a substantial minority of nephrotic syndrome — particularly outside the classic 2–6-year age range — reflects FSGS, membranous nephropathy, MPGN, or a secondary systemic process requiring different management."
      },
      {
        "title": "Management",
        "content": "The practical complications are managed proactively rather than only treating the proteinuria: signs of serious bacterial infection (peritonitis, pneumonia, sepsis) are monitored for, particularly from encapsulated organisms, given urinary immunoglobulin losses, and a high index of suspicion for thrombosis (renal vein, cerebral venous sinus, pulmonary veins) is maintained given the hypercoagulable state — even though absolute risk in children (2–5%) is lower than in adults, the consequences can be severe. The paradox of nephrotic syndrome fluid status is recognized: a child can be edematous and appear fluid-overloaded while simultaneously being intravascularly volume-depleted, which should inform cautious use of diuretics and fluid management to avoid precipitating or worsening intravascular depletion."
      }
    ]
  },
  {
    "article_id": 311,
    "article_title": "Obstructive Sleep Apnea",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "OSAS is screened for using the history and exam findings above whenever a child presents with habitual snoring, witnessed apnea, morning headache, daytime sleepiness, new-onset secondary enuresis, or ADHD-like symptoms/learning problems, with specific examination for tonsillar hypertrophy, adenoidal facies, micrognathia, and growth parameters (failure to thrive or obesity), plus blood pressure. In a child or adolescent with poorly controlled, unstable asthma — especially if overweight or obese — coexisting OSA is screened for specifically, since the two conditions frequently overlap and untreated OSA can be contributing to asthma instability."
      },
      {
        "title": "Diagnosis",
        "content": "Referral for polysomnography is made to confirm the diagnosis and grade severity, rather than relying on history and exam alone, since these clinical features cannot reliably distinguish benign primary snoring from true OSAS, and polysomnography is also needed to detect coexisting central sleep apnea, which would change the management plan. In the child with unstable asthma and suspected OSA, confirmation with polysomnography precedes starting CPAP, since CPAP helps genuine coexisting apnea but can disrupt sleep if apnea is not actually present."
      },
      {
        "title": "Management",
        "content": "For a child with confirmed OSAS from adenotonsillar hypertrophy, referral for adenotonsillectomy is made as first-line treatment; CPAP is added for children who are poor surgical candidates or who have persistent OSA after surgery. [[98|Allergic rhinitis]] and nasal congestion are managed as a shared contributing factor when both conditions coexist, since nasopharyngeal congestion and resultant mouth breathing can worsen both asthma and OSA together."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are counseled that untreated OSAS carries real long-term risk — neurocognitive impairment, behavioral problems, failure to thrive, and, if severe and prolonged, cor pulmonale and systemic/pulmonary hypertension — and that appropriate treatment can meaningfully improve behavior and cognitive function, which supports timely referral rather than a wait-and-see approach."
      }
    ]
  },
  {
    "article_id": 312,
    "article_title": "Periorbital Cellulitis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a child with unilateral eyelid erythema and swelling, the first and most important task is screening for orbital involvement: proptosis, pain with eye movement, and limitation of extraocular movement are checked for. If any of these are present, it is treated as orbital [[353|cellulitis]] - outpatient management is not attempted. If these are absent and the exam is consistent with well-demarcated preseptal swelling without proptosis or movement restriction, periorbital cellulitis is more likely. There is a low threshold to reconsider necrotizing fasciitis if swelling and systemic illness progress unusually rapidly with skin necrosis or blistering - this requires emergent surgical debridement in addition to antibiotics."
      },
      {
        "title": "Diagnosis",
        "content": "For suspected orbital cellulitis, a CT of the orbits and sinuses is obtained. Antecedent trauma, insect bites, primary skin lesions, and recent upper respiratory or sinus symptoms are asked about specifically to help identify the likely source and organism. Reassessment occurs at 24 hours: if there has been no clinical response, or if orbital involvement is newly suspected, CT imaging of the sinuses and orbits is obtained."
      },
      {
        "title": "Management",
        "content": "For confirmed orbital involvement, immediate hospitalization for IV antibiotics follows, and ophthalmology is involved (and otolaryngology if sinus disease is found). For confirmed periorbital cellulitis, most children can be treated as outpatients with oral amoxicillin-clavulanate or clindamycin and close follow-up. Hospitalization/IV antibiotics are reserved for infants under 1 year old, toxic-appearing children, those who cannot tolerate oral medication, or those who fail an outpatient trial. If there has been no clinical response on reassessment, treatment is escalated to IV antibiotics."
      }
    ]
  },
  {
    "article_id": 313,
    "article_title": "Preterm Birth",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "For any preterm infant, gestational age at birth (and, closely related, birthweight) is the single most useful piece of information for anticipating risk - the earlier the birth, the higher the risk of respiratory disease, IVH, NEC, retinopathy of prematurity, and long-term neurodevelopmental impairment, with the highest risk concentrated in infants born at or before 25 weeks."
      },
      {
        "title": "Diagnosis",
        "content": "In primary care follow-up, chronologic age is always corrected for degree of prematurity when assessing growth and [[10|developmental milestones]]. Proactive - not just reactive - screening is done for the recognized long-term risks of prematurity: [[378|language delay]], visual-perceptual problems, minor neuromotor dysfunction, attention and executive function difficulties, learning disabilities, and social/emotional problems, since these can be subtle and are common even in children who look well at early exams, including those born late preterm (33-36 weeks) who are often mistakenly treated as low-risk. Growth parameters, especially head circumference, are tracked as an early marker of nutritional adequacy and neurodevelopmental risk."
      },
      {
        "title": "Management",
        "content": "Enteral feeding is started as early as feasible even in very preterm infants, since nutrition is closely tied to long-term head growth and neurodevelopmental outcome, and [[214|malnutrition]] (particularly in VLBW infants) is specifically linked to smaller head size, poorer psychomotor/mental outcomes, and higher rates of [[164|cerebral palsy]] and autism. Longer well-child visits are planned to properly evaluate nutritional status, developmental trajectory, and family coping. Given the described association between preterm/low birth weight and later hypertension, blood pressure monitoring is considered for incorporation into longer-term follow-up for children with a preterm birth history, while recognizing the evidence here is still preliminary."
      }
    ]
  },
  {
    "article_id": 314,
    "article_title": "Refractive Error",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "When a child fails vision screening, or a parent/teacher reports squinting, eye rubbing, sitting too close to the television, headaches, or fatigue with visual tasks, referral is made for a comprehensive ophthalmic evaluation. Referral is prioritized in children with recognized risk factors for refractive error - prematurity, Down syndrome, a parent with refractive error, or connective tissue disorders such as Stickler, Marfan, or Ehlers-Danlos syndrome - even in the absence of specific complaints, since young children may not reliably report visual symptoms themselves."
      },
      {
        "title": "Diagnosis",
        "content": "A comprehensive ophthalmic evaluation including cycloplegic retinoscopy is used rather than relying on instrument-based (autorefractor) screening alone, since autorefraction can overestimate myopia in children."
      },
      {
        "title": "Management",
        "content": "Once a significant refractive error or anisometropia is identified, prompt correction with glasses is arranged as first-line treatment to prevent amblyopia and strabismus - the risk that drives the urgency of treating refractive error in children rather than in adults. Contact lenses are reserved for very high or markedly asymmetric refractive errors or for adolescents who decline glasses. Referral for off-label laser refractive surgery is considered only in the specific circumstance of a child who cannot tolerate glasses or contact lenses (due to neurobehavioral impairment or severe compliance issues) and has an amblyopiogenic refractive error, recognizing this is not a routine or approved pediatric treatment. Consistent follow-up is arranged for any child treated for amblyopia or anisometropia to confirm the corrective strategy (glasses, contacts) is being used as intended, since compliance failures in this population directly translate into missed windows for preventing permanent [[343|visual impairment]]."
      }
    ]
  },
  {
    "article_id": 315,
    "article_title": "Seizures",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "For any child presenting after a seizure, first classify the event: was it generalized or focal, provoked (identifiable trigger) or unprovoked, and did it show the abrupt-onset/no-postictal-period pattern of [[342|absence seizure]] or the prodrome-aura-ictal-postictal sequence of a tonic-clonic seizure. If a seizure is ongoing, any seizure lasting more than about 5 minutes is treated as early status epilepticus, acting quickly rather than waiting for the classic 30-minute threshold."
      },
      {
        "title": "Diagnosis",
        "content": "For a well-appearing, fully immunized 6-12 month old with a simple [[292|febrile seizure]], a lumbar puncture is not routinely performed; it is reserved as an option specifically when the child received antibiotics before the seizure or has an unknown/deficient immunization history (especially for Hib and pneumococcus). For most children with a first-time seizure who are back to baseline, routine labs and neuroimaging are avoided unless the history or exam suggests a specific secondary cause (trauma, toxin exposure, focal deficits, signs of infection). Throughout, reversible contributors are actively screened for and corrected - a bedside glucose is checked, electrolyte derangements (sodium, calcium, magnesium) are considered, and medication nonadherence (subtherapeutic anticonvulsant level) or toxin/drug exposure is asked about - since these can both explain the seizure and change immediate management independent of the antiepileptic drugs given."
      },
      {
        "title": "Management",
        "content": "A benzodiazepine is given first (diazepam 0.4 mg/kg IV or rectal, or lorazepam 0.1 mg/kg IV/IO), and repeated once if the seizure persists 5 minutes after the first dose - but different benzodiazepines are not combined given the additive respiratory depression risk. If seizures continue despite two benzodiazepine doses, treatment moves to phenobarbital (15-20 mg/kg slow IV push) or phenytoin (18 mg/kg in 100 mL normal saline over 20 minutes) as second-line therapy."
      }
    ]
  },
  {
    "article_id": 316,
    "article_title": "Otitis Externa",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "If canal swelling is too severe for drops to penetrate proximally, a wick is placed — and referral to ENT is made if the swelling is severe enough that the tympanic membrane cannot be visualized, since these patients need specialist canal management and a temporary wick. Evaluation for malignant otitis externa with imaging is performed in any diabetic or immunosuppressed patient who has disproportionate pain, otorrhea, or new cranial nerve findings — this population should not be managed with topical therapy alone."
      },
      {
        "title": "Diagnosis",
        "content": "The diagnosis is confirmed using the 48-hour onset criterion plus tragal/auricular traction tenderness, and the canal is gently debrided both to confirm the diagnosis directly and to allow topical medication to reach the inflamed skin. If drainage persists beyond 2 weeks despite appropriate treatment, referral to otolaryngology is made; if it persists beyond 6 weeks, evaluation for cholesteatoma is undertaken; and if it persists beyond 3 months despite multiple antibiotic courses, MRSA is considered the likely organism and antimicrobial coverage is adjusted accordingly."
      },
      {
        "title": "Management",
        "content": "First-line topical combination antibiotic-corticosteroid drops (polymyxin/neomycin or a fluoroquinolone) are started for uncomplicated cases, and oral analgesia is added given how painful this condition typically is. Escalation to oral ciprofloxacin is made for cases not responding to topical therapy or when [[353|cellulitis]] has spread beyond the external canal. For prevention, families are counseled to dry the ear canal after swimming and to avoid cotton swabs and other objects that disrupt the protective cerumen layer or cause canal trauma, and drying drops (e.g., dilute acetic acid or alcohol-based solutions) are considered for children with recurrent episodes, particularly frequent swimmers, since disruption of the natural cerumen barrier is the central mechanism driving this condition."
      }
    ]
  },
  {
    "article_id": 317,
    "article_title": "Peptic Ulcer Disease",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Suspected PUD is approached differently depending on age. In an infant with [[138|feeding difficulty]], vomiting, or unexplained GI bleeding, stress ulcer is considered a leading cause and is managed as a potential emergency, since infant PUD can present with perforation or significant bleeding; pediatric GI/surgery is involved early if there is any sign of hemodynamic instability or [[193|acute abdomen]]. In a school-age child or adolescent presenting with epigastric or periumbilical pain, nausea, and dyspepsia — especially with a family history, nocturnal pain, or occult blood in the stool — referral is made for pediatric GI evaluation and endoscopy rather than treating empirically for an extended period. In the emergency setting, it is first determined whether the child has a significant complication (GI hemorrhage, perforation, or gastric outlet obstruction) requiring stabilization, since this is rare but is the primary reason to escalate beyond outpatient management."
      },
      {
        "title": "Diagnosis",
        "content": "Endoscopy both confirms PUD and enables H. pylori biopsy testing. When H. pylori is confirmed on biopsy, treatment follows - serology is not relied upon to make the initial diagnosis, reserving it only for children who already have an endoscopically or radiographically confirmed ulcer."
      },
      {
        "title": "Management",
        "content": "For most children in whom PUD is suspected as a cause of abdominal pain, it is appropriate to arrange outpatient diagnostic workup, start a gastric antisecretory regimen empirically, and ensure close follow-up rather than admitting for immediate inpatient workup. Confirmed H. pylori is treated with triple therapy (PPI plus two antibiotics) for 7–14 days, followed by continued acid suppression for a period afterward (e.g., 2 months) to support healing. Medication history is actively reviewed for NSAID use, since drug-induced ulceration is the most common ulcer type in children, and this modifiable cause is addressed directly (stopping the NSAID) as part of management alongside acid suppression."
      }
    ]
  },
  {
    "article_id": 318,
    "article_title": "Phenylketonuria",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "If an infant presents with vomiting, irritability, an eczematous rash, and a musty/mousy odor — particularly if fairer in complexion than unaffected relatives — PKU is considered even if newborn screening was reportedly normal or is pending. For any young woman with PKU approaching or during childbearing age, strict return to (or maintenance of) phenylalanine restriction before and throughout pregnancy is emphasized, since maternal PKU can cause fetal harm irrespective of the fetus's own genetic status."
      },
      {
        "title": "Diagnosis",
        "content": "Every newborn receives screening in the first few days of life, and testing is specifically repeated by the second week of life for any infant screened before 24 hours of age, since delayed detection risks irreversible neurologic damage that begins to occur by about 8 weeks of age. Plasma phenylalanine and phenylalanine:tyrosine ratio testing is pursued; a urine ferric chloride test can be a rapid adjunct in the emergency setting when the characteristic odor prompts suspicion. Classic PKU is differentiated from the rarer biopterin-related variants by checking urinary pterins and blood dihydropteridine reductase activity, since these variants need additional treatment with neurotransmitter precursors beyond diet alone — missing this distinction means diet alone will not prevent neurologic damage in these patients."
      },
      {
        "title": "Management",
        "content": "Once PKU is confirmed, a phenylalanine-restricted diet with a phenylalanine-free medical formula is initiated as soon as possible, and referral is made to a metabolic disease clinic and a nutritionist experienced in PKU for ongoing, careful dietary monitoring — the treatment is lifelong, not just an infant/childhood intervention. Continued breastfeeding is supported if the family wishes, but only with close specialty clinic oversight to balance breast milk's phenylalanine content against formula and dietary needs. Families are counseled explicitly that aspartame-containing products must be avoided completely, since this common sweetener is a hidden phenylalanine source. Treated children are monitored with phenylalanine level testing coordinated by the metabolic clinic to confirm control is achieved early (ideally by 3–4 weeks of age) and sustained over time, since both the timing and the consistency of control drive long-term cognitive outcome."
      }
    ]
  },
  {
    "article_id": 319,
    "article_title": "Puncture Wound Infection",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Whether the puncture occurred through a shoe, particularly a sneaker, is specifically asked about, since this raises specific concern for Pseudomonas infection and should influence empiric antibiotic selection if infection develops. Prompt reassessment is warranted if [[353|cellulitis]] develops after a puncture wound, and the workup is escalated if signs of infection persist beyond the expected course, since this may indicate a retained foreign body or deep infection ([[227|septic arthritis]], chondritis, [[175|osteomyelitis]]) requiring surgical debridement. For animal or human bite puncture wounds, wound severity and location are assessed (hand/face carry higher risk)."
      },
      {
        "title": "Diagnosis",
        "content": "A plain radiograph is obtained for puncture wounds, especially those over the metatarsophalangeal joints or other weight-bearing areas, to look for a radiopaque foreign body (glass, metal) or bony penetration; if suspicion for a retained foreign body remains despite a negative plain film, ultrasound, CT, or MRI is pursued, since organic material is often radiolucent. For purulent cellulitis/abscess, ultrasound is used to confirm a drainable collection when exam is unclear."
      },
      {
        "title": "Management",
        "content": "For a straightforward foot puncture wound, thorough irrigation is performed, [[266|tetanus]] prophylaxis is updated as indicated by the child's immunization history, and a course of antibiotics is considered per local practice; families are counseled that the majority of these wounds heal without complication using this approach. Cellulitis after a puncture wound is treated with IV antibiotics, with surgical drainage added if an abscess forms, and a 10–14 day systemic antibiotic course covering S. aureus and Pseudomonas is given for deep infection. I&D is performed for mild-to-moderate purulent disease, and TMP-SMX is added or IV vancomycin with I&D is used based on abscess size, extent of cellulitis, and systemic signs (fever, hypotension) or immunocompromise. For animal or human bite wounds, amoxicillin-clavulanate prophylaxis is given for 5 days when the wound is moderate/severe, the patient is immunocompromised, or there is possible penetration of the periosteum or joint capsule or significant edema — prophylaxis should not be withheld on these higher-risk bite wounds while waiting to see if infection develops."
      }
    ]
  },
  {
    "article_id": 320,
    "article_title": "School Refusal",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "When a child is missing school 2–3 days per week for 2 or more weeks, school refusal is first distinguished from truancy and from ordinary illness-related absenteeism: confirmation that the parent is aware the child is at home rules out truancy, and the characteristic pattern of somatic symptoms confined to weekday, term-time mornings that resolve by midday, without underlying organic explanation, is sought. Bullying (traditional and cyber) and violence or fear of violence at school are always asked about directly, given how commonly these contribute to school-associated refusal and how serious the downstream emotional consequences can be. Suicidal ideation is asked about directly given documented cases among school refusers, and any positive response is treated as requiring immediate, serious follow-up rather than downplaying it as anxiety."
      },
      {
        "title": "Diagnosis",
        "content": "A sensitive, holistic history-taking approach is used — the first conversation itself begins building the therapeutic alliance needed to shift the family away from avoidant behavior — and child-related factors (age-appropriate fears, temperament, academic performance), family factors (parental illness, family stress, overdependency dynamics), and school factors (bullying, violence, academic pressure) are systematically explored rather than assuming a single cause. Screening is done for anxiety disorders (especially separation anxiety in younger children), depression, oppositional defiant disorder, panic disorder, and agoraphobia, recognizing that 20–30% of affected children will not meet criteria for any specific psychiatric diagnosis — a normal screen does not exclude school refusal as the correct diagnosis."
      },
      {
        "title": "Management",
        "content": "Management is tailored to age and underlying dynamic: for a younger child with separation-anxiety-driven refusal, work is directed toward gently increasing tolerance of separation from parents (for example, practicing overnight stays with relatives or friends) while a prompt, early return to school rather than prolonged time at home is arranged, since delay tends to entrench the avoidance pattern. The family and the school are engaged collaboratively in a shared plan, cognitive-behavioral therapy and relaxation techniques are involved, and, when an anxiety or depressive disorder is present, SSRIs are considered as part of a comprehensive treatment plan. Physician involvement itself is framed as marking a turning point that signals to the child and family the seriousness of the symptoms and the need to change the avoidant pattern, and families are counseled explicitly about the meaningful long-term risks (school non-completion, later psychiatric care, disrupted independence) of unaddressed school refusal to support engagement with treatment rather than continued accommodation of avoidance."
      }
    ]
  },
  {
    "article_id": 321,
    "article_title": "Hypoglycemia",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Hypoglycemia is suspected in any infant or child with autonomic signs (shakiness, sweating, pallor, dizziness) or neuroglycopenic signs (irritability, lethargy, confusion, seizures); neonates and infants are frequently asymptomatic or show only subtle findings such as cyanosis, apnea, hypothermia, hypotonia, jitteriness, or poor feeding."
      },
      {
        "title": "Diagnosis",
        "content": "A blood glucose below 60 mg/dL (3.3 mmol/L) confirms hypoglycemia in infants and children outside the first 72 hours of life. Whenever the glucose is below 50 mg/dL (2.8 mmol/L), a critical sample is obtained before treating, since this is the point at which a diagnostic fasting or provocative test would also be stopped. A simultaneous insulin level above 2 µU/mL at a glucose below 60 mg/dL, together with low ketones and low lactate, points to hyperinsulinism; absent ketonemia and ketonuria with an appropriately suppressed insulin instead points to a fatty acid oxidation defect. In a patient with known diabetes, hypoglycemia is defined at a higher threshold, below 70 mg/dL, and does not need this same critical-sample workup."
      },
      {
        "title": "Management",
        "content": "Hypoglycemia is treated immediately once recognized or confirmed, with the goal of restoring and keeping glucose above 70 mg/dL — a target that matters most in hyperinsulinism, where the child cannot fall back on ketones as brain fuel while glucose is low. In a child with diabetes, this means prompt carbohydrate treatment, and patients and families are taught to always carry a source of carbohydrate along with a glucose meter when away from home, aiming to normalize glucose quickly without giving so much carbohydrate that it rebounds into hyperglycemia. Diazoxide can be used for hyperinsulinism, including the syndromic hyperinsulinism of [[323|Beckwith-Wiedemann syndrome]]. Beyond the initial glucose correction, long-term management turns on identifying the underlying cause, since that determines the definitive treatment and the risk of recurrence."
      }
    ]
  },
  {
    "article_id": 322,
    "article_title": "Undescended Testis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Examination is performed in a warm room with warm hands. Inspection for scrotal asymmetry is done - a hypoplastic hemiscrotum suggests the testis has never descended. With the child supine or sitting, an attempt is made to guide the testis down the inguinal canal into the scrotum. If successful, it is held in the scrotum for 30 seconds to fatigue the cremaster: a retractile testis remains down, a true undescended testis springs back up. Bilateral non-palpable testes in a newborn phenotypic male require prompt evaluation for a disorder of sex development, since the infant may be a virilized genetic female with salt-wasting [[136|congenital adrenal hyperplasia]] - a potentially life-threatening diagnosis. Separately, an acutely tender groin mass with an empty ipsilateral scrotum in a boy with a known undescended testis should prompt immediate consideration of [[231|testicular torsion]] (as well as incarcerated inguinal hernia or acute hydrocele of the cord) and prompt surgical evaluation."
      },
      {
        "title": "Diagnosis",
        "content": "Scrotal ultrasound has no role in locating a non-palpable testis - it does not change management and is reserved for a painful or mass-like scrotum. The same urgent evaluation is warranted for a neonate with hypospadias plus an undescended testis: the risk of an underlying disorder of sex development is about 15% when the testis is palpable and rises to about 50% when it is non-palpable."
      },
      {
        "title": "Management",
        "content": "If the testis has not descended by 6 months of age (corrected for gestational age), referral for surgery is made rather than waiting further, since spontaneous descent essentially does not occur after this point. A UDT found together with an inguinal hernia should go to surgery at the time of diagnosis, not be deferred to 6 months. Bilateral non-palpable testes and hypospadias with an undescended testis both prompt urgent evaluation for a disorder of sex development, and an acutely tender groin mass in a boy with a known undescended testis prompts prompt surgical evaluation for possible testicular torsion."
      }
    ]
  },
  {
    "article_id": 323,
    "article_title": "Beckwith-Wiedemann Syndrome",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a newborn with macrosomia, macroglossia, an omphalocele or umbilical hernia, hemihyperplasia, visceromegaly, or characteristic linear ear creases, blood glucose is checked promptly and monitored closely, since [[97|neonatal hypoglycemia]] from pancreatic beta-cell hyperplasia is common and clinically important in BWS. Hyperinsulinism affects about half of BWS infants; most cases are mild, resolve within the first several weeks of life, and respond to diazoxide."
      },
      {
        "title": "Diagnosis",
        "content": "If hypoglycemia proves severe or persistent and unresponsive to diazoxide, paternal uniparental isodisomy of 11p is considered as the underlying mechanism, which can require treatment into adulthood or lifelong. At diagnosis, screening for nephrourological malformations is done with clinical evaluation and renal ultrasound. An elevated or rising AFP or an abnormal ultrasound finding warrants prompt further evaluation, since early detection at an earlier tumor stage significantly improves outcomes."
      },
      {
        "title": "Management",
        "content": "Because of the marked predisposition to embryonal tumors — chiefly Wilms tumor, hepatoblastoma, and adrenocortical carcinoma, with hepatoblastoma risk reported at roughly 2280-fold the general population — children with BWS require structured, ongoing surveillance rather than a one-time workup. Recommended monitoring is serum alpha-fetoprotein every 3 months (protocols describe this through age 3-4 years) together with abdominal ultrasound every 3 to 4 months until about age 7-8 years; one source describes AFP and abdominal/renal sonograms every 4 months for a child under surveillance. A 2018 international consensus statement recommends tailoring the exact surveillance protocol to the specific genetic or epigenetic mechanism identified. Because tumor risk is concentrated in the first 8 years of life and uncommon thereafter, surveillance can generally be relaxed beyond that age."
      }
    ]
  },
  {
    "article_id": 324,
    "article_title": "Nasal Fracture",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Active epistaxis is addressed with direct pressure. A mechanism history is taken to screen for associated closed head injury, then examination is done for septal hematoma, obvious fracture or deviation, and signs of ophthalmologic or severe head injury; any clear fluid drainage from the nose should raise concern for a CSF leak. Crepitus or tenderness over a sinus suggests an associated sinus fracture. Nasal trauma as part of major trauma, or with associated neurologic changes, warrants emergent evaluation. An intranasal speculum exam is performed on every child with nasal trauma specifically to look for a septal hematoma - an untreated hematoma causes pressure necrosis of the avascular septal cartilage and a saddle-nose deformity."
      },
      {
        "title": "Diagnosis",
        "content": "Imaging is rarely needed emergently, since plain films are hard to interpret and rarely change management of an isolated nasal injury; fine-cut facial CT is reserved for suspected associated injuries. If swelling limits assessment of deformity, re-examination is planned in 2-7 days once it resolves."
      },
      {
        "title": "Management",
        "content": "A septal hematoma requires urgent incision and drainage. A fracture with visible deformity or functional (airway) compromise should be reduced, typically by closed reduction under general anesthesia, with the goal of reduction within about 7 days of injury; a child with persistent nasal deformity at 4-5 days post-injury needs urgent referral to a subspecialist to restore anatomic alignment."
      }
    ]
  },
  {
    "article_id": 325,
    "article_title": "Rickets",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a child with bony deformity, fracture out of proportion to trauma, failure to thrive, or nonspecific bone pain, evaluation starts with a dietary and social history, since most rickets is nutritional; a family history can suggest 1-alpha-hydroxylase deficiency or renal phosphate wasting, and prior response to vitamin D treatment can help localize the defect. Examination is done for craniotabes, frontal bossing, delayed fontanel closure, rachitic rosary, Harrison groove, and widened wrists and ankles, and hypocalcemic signs — tetany, seizures, or stridor from laryngeal spasm — are checked for."
      },
      {
        "title": "Diagnosis",
        "content": "Diagnosis is confirmed with radiographs showing metaphyseal cupping, splaying, and fraying, bowing, cortical narrowing, or stress fracture lines, alongside laboratory testing of calcium, phosphorus, and vitamin D levels, since all patients with rickets have an abnormality in calcium and/or phosphorus. In preterm or low-birth-weight infants, particularly those under 27 weeks gestation or under 1500 g, calcium, phosphorus, and alkaline phosphatase are monitored weekly and serum bicarbonate is checked periodically, since [[387|metabolic acidosis]] promotes bone dissolution. At least one screening radiograph for rickets is obtained at 6-8 weeks of age in high-risk infants, with additional films as clinically indicated."
      },
      {
        "title": "Management",
        "content": "For prevention, breastfed infants are given vitamin D supplementation of at least 400 IU/day, per the American Academy of Pediatrics recommendation."
      }
    ]
  },
  {
    "article_id": 326,
    "article_title": "Vitamin D Deficiency",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Vitamin D deficiency is considered in an infant or child with hypocalcemic symptoms (tetany, seizures), [[246|growth failure]], lethargy, irritability, hypotonia, craniotabes, or recurrent respiratory infection, particularly in an exclusively breastfed infant without supplementation, a child with dark skin pigmentation, prematurity, fat malabsorption (cholestatic liver disease, cystic fibrosis, IBD), anticonvulsant use, or a vegan diet using unfortified soy or rice milk."
      },
      {
        "title": "Diagnosis",
        "content": "Screening is done with serum 25-hydroxyvitamin D: a level under 15 ng/mL defines deficiency and 15-20 ng/mL defines insufficiency. The classic pattern of low-normal or low calcium, low phosphate, high alkaline phosphatase, and high PTH is expected in vitamin D-deficient [[325|rickets]]; in very young infants, [[368|hypocalcemia]] (including seizures) may be the presenting feature rather than overt rickets."
      },
      {
        "title": "Management",
        "content": "For prevention, all infants are given 400 IU/day of vitamin D from birth; supplementation is continued in breastfed infants until they are taking 1 quart of formula daily. Older children and adolescents not obtaining 400 IU/day through diet should take a 400 IU vitamin D supplement, and the RDA for healthy children 1-18 years is 600 IU/day, which is also the dose recommended for older children with risk factors for inadequate intake. Once deficiency or rickets is diagnosed, treatment combines vitamin D with calcium and phosphorus supplementation and dietary sources rich in these nutrients."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Most children respond well, with radiologic healing within a few months and rapid normalization of laboratory values."
      }
    ]
  },
  {
    "article_id": 327,
    "article_title": "Splenic Injury",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a hemodynamically stable child with blunt splenic injury on CT, management is nonoperative with observation; interventional radiology is only rarely needed. Laparotomy is reserved for the rare child who is not hemodynamically stable, and splenic repair is preferred over splenectomy whenever the spleen can be preserved, given the long-term infectious risk of asplenia."
      },
      {
        "title": "Diagnosis",
        "content": "CT findings are used to guide the timing of safe return to usual activity, and follow-up imaging is not routinely ordered once the child is stable."
      },
      {
        "title": "Management",
        "content": "This nonoperative approach now succeeds in more than 95% of pediatric cases while avoiding the complications, transfusion needs, and longer hospital stay associated with surgery. Any child left asplenic - after trauma splenectomy or from functional asplenia such as [[162|sickle cell disease]] - needs lifelong precautions against overwhelming infection with encapsulated organisms (Streptococcus pneumoniae, Haemophilus influenzae type b, Salmonella). Prophylactic penicillin or amoxicillin is started, especially in children under 5 years of age, and pneumococcal conjugate, Hib, and meningococcal vaccines are kept up to date."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are counseled that risk of fulminant septicemia is highest in young children and can be increased up to 350-fold compared with an immunocompetent child, so any fever in an asplenic child warrants urgent medical evaluation."
      }
    ]
  },
  {
    "article_id": 328,
    "article_title": "Compartment Syndrome",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Compartment syndrome is suspected in any child with an extremity fracture or blunt/crush injury — especially a tibial shaft, proximal tibial metaphyseal, supracondylar humerus, or displaced forearm fracture — who has pain out of proportion to the injury, or pain that is increasing despite analgesic administration. In children, the \"3 As\" — anxiety, agitation, and an escalating analgesia requirement — are relied on rather than the classic \"5 Ps\", since paresthesia, pallor, pulselessness, and paralysis are late findings and a child may show only a single sign."
      },
      {
        "title": "Diagnosis",
        "content": "Examination is done for pain with passive stretch of the toes or fingers, and for a tense, non-compressible, swollen compartment. Orthopedics is consulted urgently for any such concern, and compartment pressure measurement is obtained when feasible: an absolute pressure of 30 mmHg or more, or a value within 30 mmHg of the diastolic blood pressure or mean arterial pressure, supports the diagnosis."
      },
      {
        "title": "Management",
        "content": "As soon as compartment syndrome is suspected, any cast or splint is removed or split immediately, and the affected extremity is elevated only to the level of the heart — not above it, since elevation above heart level reduces tissue perfusion and worsens ischemia. Urgent orthopedic consultation is obtained without delay; definitive treatment is prompt, wide fasciotomy of the affected compartments. All children with an open fracture, or with a diagnosis of or concern for compartment syndrome, are admitted for ongoing orthopedic care given the high risk of infection and neuromuscular injury. In the rare neonatal presentation of a swollen, paralyzed, dysvascular limb with a sentinel forearm lesion, emergency surgical fasciotomy is the only treatment that may salvage limb function."
      }
    ]
  },
  {
    "article_id": 329,
    "article_title": "Child Abuse",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "The most common presentation of an abused child is actually asymptomatic, so absence of visible injury never excludes abuse. Historical red flags are weighed together rather than in isolation: an implausible, discrepant, evolving, or absent mechanism for the injury; delay in seeking care; a history of abuse in the caregiver's own childhood; escalating injury severity or frequency; and social or physical isolation of the child or family. In an infant under 1 year presenting with head injury, child abuse is treated as the leading cause until proven otherwise, and abusive [[139|head trauma]] (shaken baby syndrome) is specifically considered when an infant presents with lethargy, poor feeding/sucking, or retinal hemorrhage with a trivial reported mechanism such as rolling off a bed - shaking can cause coma with no external signs of cutaneous trauma. Neglect most commonly presents as failure to thrive, and can also present as lack of supervision (such as an unintentional [[338|toxic ingestion]]) or as medical/dental neglect from missed treatments or appointments - each of these presentations should also prompt consideration of a protective referral."
      },
      {
        "title": "Diagnosis",
        "content": "A detailed history is taken from the caregiver and the child is examined thoroughly. Because fractures are present in only a minority of physically abused children, their absence does not rule out abuse, while multiple fractures at different stages of healing are a characteristic pattern when present. Experienced colleagues, pediatric radiology, and pediatric or orthopedic surgery are consulted early when abuse is suspected, since presentations are frequently subtle."
      },
      {
        "title": "Management",
        "content": "Once abuse is suspected, a report is made to the child protection agency for investigation - reporting is not delayed while awaiting diagnostic certainty. Emergency social work/child protective services are engaged, care is coordinated with other professionals and community agencies for both immediate and long-term treatment, and the family is supported through the process."
      }
    ]
  },
  {
    "article_id": 330,
    "article_title": "Herpes Zoster",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Herpes zoster is suspected in a child with grouped vesicles on an erythematous base confined to one to three dermatomes and not crossing the midline, especially over the thorax or a cranial nerve distribution, sometimes preceded by burning pain, itching, or paresthesia in that area. Risk factors that raise suspicion and prognosis are asked about: varicella acquired in the first 1-2 years of life, intrauterine VZV exposure, maternal varicella during pregnancy, or immunosuppression (including [[372|HIV infection]], where zoster is about 10 times more frequent than in healthy age-matched children). Recurrent or multidermatomal shingles should prompt evaluation for an underlying T-cell immune defect."
      },
      {
        "title": "Diagnosis",
        "content": "An ophthalmologic examination is performed whenever the ophthalmic (V1) branch of the trigeminal nerve is involved, because of the risk of corneal involvement."
      },
      {
        "title": "Management",
        "content": "Antiviral drugs can be used to treat herpes zoster. In an immunosuppressed child, more generalized lesions or visceral involvement are watched for, which is more common in that population."
      },
      {
        "title": "Prognosis and outcome",
        "content": "In an otherwise healthy child, herpes zoster typically runs a mild course — lesions crust within about 1-2 weeks, acute neuritis is minimal, and postherpetic neuralgia is rare, unlike the pattern in adults. When the varicella vaccine itself is the cause of zoster in an immunocompetent child, families are reassured that this is usually a mild illness."
      }
    ]
  },
  {
    "article_id": 331,
    "article_title": "Epiglottitis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Epiglottitis is suspected in a toxic-appearing, febrile child aged roughly 1-8 years with the triad of drooling, dysphagia, and respiratory distress, especially when sitting upright, leaning forward, or tripoding, with no preceding viral prodrome, no barky cough, and no hoarseness - features that separate it from croup. The child is not agitated, the oropharynx is not examined with a tongue depressor, the child is not placed supine, and the child is not sent alone for imaging: any of these can precipitate sudden, complete airway obstruction. The child is kept calm, ideally in a caregiver's lap, while care moves directly toward definitive airway management. A skilled provider should stay with the patient at all times until the airway is visualized and secured."
      },
      {
        "title": "Diagnosis",
        "content": "If a lateral neck radiograph is obtained, it should not delay this process; a thumbprint sign supports the diagnosis but a normal or unobtainable film does not exclude it in a clinically classic presentation."
      },
      {
        "title": "Management",
        "content": "Otolaryngology (and, where available, a pediatric anesthesiologist and pediatric surgeon or otolaryngologist) is involved immediately for controlled evaluation and, typically, nasotracheal intubation in the operating room; tracheostomy is used less often. Direct visualization/instrumentation should be performed only in this controlled setting because of the risk of triggering complete obstruction. Intubation is typically needed for about 2-3 days given the usually rapid response to antibiotics. Broad-spectrum antibiotics are started promptly - vancomycin plus cefotaxime, or ceftriaxone/cefotaxime - to cover H. influenzae, S. pneumoniae, group A streptococcus, and S. aureus. Because occult H. influenzae [[350|bacteremia]] leads to meningitis or another deep/focal infection in 30-50% of cases, adequate systemic antibiotic treatment of the underlying infection is essential alongside airway management."
      }
    ]
  },
  {
    "article_id": 332,
    "article_title": "Spinal Cord Injury",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In any child with a significant mechanism of injury (motor vehicle crash, fall, sports injury, or assault) or clinical findings suggesting SCI, it is noted that in children under 5 injury more often localizes to the upper cervical spine (occiput to C3), while adolescents pattern more like adults, with lower cervical or thoracolumbar fracture-dislocation. Local spinal pain or torticollis is specifically watched for. In a neonate with severe respiratory compromise and profound hypotonia after a breech or forceps delivery, birth-related cervical spinal cord injury is considered and spinal shock (flaccid extremities, diaphragmatic breathing, distended bladder, paralyzed abdominal movements) is watched for; treatment here is supportive."
      },
      {
        "title": "Diagnosis",
        "content": "A standardized neurological examination (per the International Standards for Neurological and Functional Classification of SCI, applicable from age 6) is performed rather than relying on imaging alone: a normal X-ray and initial exam do not exclude SCI, since children are prone to SCIWORA and can have neurologic deficits with delayed onset up to 4 days after injury. The back is examined by logrolling, and hair, collars, and splints are checked underneath. MRI is obtained whenever there is real concern for cord injury."
      },
      {
        "title": "Management",
        "content": "Corticosteroids are not given for acute spinal cord injury — this is no longer recommended. Once SCI is identified, priority is given to avoiding secondary and iatrogenic injury: impaired systemic function is supported, the spine is stabilized (surgically if indicated, recognizing this may limit subsequent MRI assessment), and emergent decompression is pursued for any cord impingement. Management is as an interdisciplinary team from the outset — neurosurgery, critical care/trauma surgery, neurology, physical medicine and rehabilitation, and allied therapies. Acute inpatient rehabilitation addressing mobility, skin and pressure-ulcer prevention, thermoregulation, and stress-ulcer prophylaxis is planned."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are counseled early that neurologic status at presentation — intact/incomplete versus complete injury — is the strongest predictor of eventual recovery."
      }
    ]
  },
  {
    "article_id": 333,
    "article_title": "Metabolic Syndrome",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Rather than trying to apply a specific pediatric \"metabolic syndrome\" definition or fixed cut-points - which the AAP explicitly advises against, since cardiometabolic risk in youth lies on a continuum - each child is screened for the individual component risk factors: adiposity/central obesity, blood pressure, lipid panel (triglycerides and HDL-cholesterol, plus LDL-cholesterol), and glucose. Children in whom several of these risk factors are clustering together are identified, since this clustering - not a specific diagnostic label - is what predicts later cardiovascular disease and type 2 diabetes."
      },
      {
        "title": "Diagnosis",
        "content": "The adult NCEP ATP III thresholds (fasting glucose over 100 mg/dL, triglycerides at or above 150 mg/dL, HDL under 40 mg/dL in males or under 50 mg/dL in females, and blood pressure at or above 130/85 mm Hg, together with central obesity) provide the reference points these components are built from."
      },
      {
        "title": "Management",
        "content": "Because the component risk factors share a common pathophysiologic root in [[373|insulin resistance]] and adipose tissue dysfunction, first-line management of each is largely the same: lifestyle modification. The individual risk factors identified on screening (weight/adiposity, blood pressure, dyslipidemia, hyperglycemia) are treated rather than withholding intervention while waiting for a formal syndrome diagnosis, since early treatment of this risk clustering is the actionable target in pediatric care."
      }
    ]
  },
  {
    "article_id": 334,
    "article_title": "Syncope",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Specific inquiry is made about syncope occurring while recumbent or during exercise, associated chest pain or palpitations, personal history of repaired or unrepaired heart disease, and family history of unexplained death, [[291|drowning]], [[146|hypertrophic cardiomyopathy]], [[213|long QT syndrome]] or other arrhythmias, or pacemaker placement. Note is made of whether there was a typical vasovagal prodrome (diaphoresis, warmth, pallor, lightheadedness) and a recognizable trigger (prolonged standing, heat, crowding, pain, emotional distress, position change) — syncope without a prodrome is a concerning feature. Any child with an abnormal cardiac exam is referred for urgent cardiac evaluation."
      },
      {
        "title": "Diagnosis",
        "content": "Every child with syncope is evaluated with a comprehensive medical and family history, thorough physical examination, and a 12-lead ECG — this combination identifies most patients with a life-threatening cause, while routine blood testing and imaging add little and are not recommended routinely. Cardiac evaluation (echocardiography, further rhythm monitoring, specialist referral) is reserved for children with high-risk features: early sudden cardiac death in the family, known or suspected heart disease, congenital cardiac abnormality, exercise-induced syncope, syncope without a prodrome, or an abnormal ECG."
      },
      {
        "title": "Management",
        "content": "In the absence of high-risk features, and with a history consistent with reflex (vasovagal/situational) syncope, observation until the patient returns to baseline, followed by education and reassurance, is appropriate. Most patients can be discharged home after this evaluation without further testing."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Recurrence is common but the overall prognosis is benign in reflex syncope."
      }
    ]
  },
  {
    "article_id": 335,
    "article_title": "Sunburn",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "The visit is used as an opportunity for prevention counseling, since instruction about preventing future sunburns should be delivered at the time of the burn itself."
      },
      {
        "title": "Diagnosis",
        "content": "Once peak erythema is reached (roughly 24 hours after exposure), the desquamative (peeling) phase is recognized and managed accordingly."
      },
      {
        "title": "Management",
        "content": "Treatment is with cool compresses and oral analgesics; topical anesthetics are avoided, as they are relatively ineffective for sunburn and can themselves cause a contact dermatitis. A bland emollient such as plain petrolatum can be used through the desquamative phase. Sun avoidance during peak UV hours is advised. In infants under 6 months, because sunscreen safety is not established at this age, sun avoidance plus protective clothing and hats is recommended rather than sunscreen, reserving only a minimal application to small exposed areas (face, backs of the hands) for situations where shade is genuinely unavailable. From 6 months of age onward, a broad-spectrum sunscreen of SPF 30 or greater applied to exposed skin on both sunny and cloudy days is recommended, together with protective clothing, wide-brimmed hats, and sunglasses."
      },
      {
        "title": "Prognosis and outcome",
        "content": "It is reinforced that any sunburn - and blistering sunburn in particular during childhood and adolescence - raises long-term skin cancer risk, including [[215|melanoma]], which is a key reason to counsel on sun protection at every opportunity."
      }
    ]
  },
  {
    "article_id": 336,
    "article_title": "Tick-Borne Illness",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a child with progressive ataxia evolving into ascending, generalized flaccid weakness — with possible paresthesias, hyporeflexia, and bulbar signs such as ptosis or facial weakness — the scalp and skin folds are searched carefully for an attached tick before assuming Guillain-Barré syndrome or botulism, since tick paralysis is more common in children than adults and resolves rapidly once the tick is removed; delay risks progression to respiratory failure. In a febrile child with a tick-exposure history, headache, myalgia/arthralgia, rash, or abdominal tenderness, a rickettsial or relapsing-fever illness is considered: relapsing fever classically produces sudden high fever with headache, photophobia, nausea, myalgia, and arthralgia, later joined by abdominal pain, cough, bleeding manifestations, and a brief trunk/shoulder rash near the end of the febrile episode, with jaundice in about half of affected children and CNS findings possible in late relapses."
      },
      {
        "title": "Diagnosis",
        "content": "Because vasculitic complications (brain, heart, lung) and death are linked to delayed therapy, presumptive treatment is based on clinical suspicion rather than waiting for confirmatory testing."
      },
      {
        "title": "Management",
        "content": "Treatment for tick-borne rickettsial illness is supportive, avoiding analgesics that impair platelet function because of the bleeding risk from vasculitis. Routine doxycycline prophylaxis is not offered after an isolated tick bite, since the risk of infection is low and effectiveness unproven; prevention counseling is given instead — avoiding densely vegetated or brushy areas, using repellents and protective clothing, and checking for and promptly removing attached ticks, since attachment for 6 hours or more is associated with transmission. Confirmed ehrlichiosis or anaplasmosis is reported to the local or state health department, as these are notifiable diseases."
      }
    ]
  },
  {
    "article_id": 337,
    "article_title": "Thyroid Nodule",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Every thyroid nodule identified in a child merits complete evaluation, given the higher relative malignancy risk compared with adults. The following are treated as pointers toward malignancy warranting expedited work-up: rapid nodule growth, a firm or hard nodule fixed to surrounding structures, satellite or enlarged cervical lymph nodes, a nodule 1 cm or larger with irregular or calcified borders, and new hoarseness or dysphagia."
      },
      {
        "title": "Diagnosis",
        "content": "Evaluation starts with a serum TSH and a neck ultrasound. If TSH is low, radionuclide scintigraphy is obtained to assess for an autonomous (hyperfunctioning) nodule; these are generally benign and usually do not need biopsy. If TSH is normal or elevated, ultrasound characterization of the nodule and gland follows; referral for ultrasound-guided fine-needle aspiration biopsy is made if the nodule is sonographically suspicious or 1 cm or larger. History is taken specifically asking about prior neck/head irradiation and family history of thyroid disease, medullary thyroid carcinoma, or MEN syndromes, since these change the pretest probability of malignancy substantially. A calcitonin level is checked and RET genetic testing is considered when there is a family history of medullary thyroid carcinoma, pheochromocytoma, hyperparathyroidism, or mucosal neuromas suggestive of MEN-2A or MEN-2B."
      },
      {
        "title": "Management",
        "content": "Urgent outpatient follow-up with a specialist experienced in pediatric thyroid nodules is arranged for any child in whom a nodule is found, since same-visit reassurance is not appropriate even for an asymptomatic, incidentally discovered nodule. Identifying a causative RET mutation can prompt prophylactic thyroidectomy on a defined timeline (by age 5 years for certain MEN-2A mutations, by 6 months of age for certain MEN-2B mutations), so early genetic counseling and testing in affected families is important."
      }
    ]
  },
  {
    "article_id": 338,
    "article_title": "Toxic Ingestion",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Any child with an unexplained symptom complex — altered mental status or behavior, seizure, cardiac dysrhythmia, hypotension or shock, respiratory distress or apnea, cyanosis, vomiting, or diarrhea — is approached with toxic ingestion on the differential, especially if the presentation does not fit a recognizable clinical syndrome. A slower-onset coma, or one preceded by delirium or abnormal behavior, favors a toxic cause over trauma. The classic accidentally-attractive agents — iron tablets resembling candy, and high-ethanol mouthwash without child-safety packaging — are kept in mind when taking an exposure history in a toddler."
      },
      {
        "title": "Diagnosis",
        "content": "Assessment starts with directed history (what agents were accessible, timing, quantity if known) and physical examination for symptom pairs that suggest a toxidrome: bradycardia or tachycardia, hypothermia or hyperthermia, respiratory depression or hyperpnea, hypotension or hypertension, mydriasis or miosis. Because ingestions are often unwitnessed, screening is also done for metabolic derangements — hypoglycemia, [[170|hyponatremia]], hyperammonemia — that can accompany or mimic ingestion. The type of exposure is weighed against known risk: caustic ingestion is the leading toxic exposure in children, with most cases from mild alkali agents (bleach, detergents) that can be relatively benign, but button battery ingestion is increasingly common and can be extremely dangerous, and liquid or strong alkali agents cause more severe injury than solids. The classically lethal-in-small-dose pharmaceutical categories are considered specifically — antimalarials, beta-blockers, calcium channel blockers, camphor, antidiarrheals, salicylates, opioids, and tricyclic antidepressants — since these carry disproportionate risk even in small quantities."
      },
      {
        "title": "Management",
        "content": "Initial emergency management in any responsive patient prioritizes airway, breathing, and circulation."
      }
    ]
  },
  {
    "article_id": 339,
    "article_title": "Tinea Capitis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Tinea capitis is suspected in a school-age child (peak 3-7 years) with patchy alopecia, broken or stubby hairs, scalp scaling, or a boggy inflammatory plaque (kerion), particularly when accompanied by posterior cervical or suboccipital lymphadenopathy - it is considered even when classic crusting or redness is absent."
      },
      {
        "title": "Diagnosis",
        "content": "A mycologic examination is performed looking for T. tonsurans, the cause of up to 95% of US cases; contact with kittens or puppies is asked about if M. canis (zoophilic) is suspected, and contact with other affected children, shared combs/hats/hairbrushes, or affected family members is asked about for T. tonsurans (anthropophilic) exposure. Because up to 60% of children with tinea capitis are asymptomatic carriers, and adult family members can also be asymptomatic carriers who perpetuate reinfection, screening of close contacts is considered when a child has recurrent infection."
      },
      {
        "title": "Management",
        "content": "Topical antifungals alone are not used - they cannot penetrate the hair shaft and will not clear the infection. Oral griseofulvin (first-line) is started for at least 8 weeks in children over 2 years of age, with administration advised alongside fatty food to improve absorption; oral terbinafine for 2-6 weeks is an alternative in children over 4 years. In children under 2 years, oral fluconazole is used; topical azole (e.g., clotrimazole) or allylamine (e.g., terbinafine) therapy is an option in this youngest age group only when the affected hairs are fine. A kerion is managed with the same systemic antifungal therapy - most patients, including those with a boggy, fluctuant-appearing kerion and tender regional adenopathy, respond well to griseofulvin without needing incision or drainage. Families are counseled about hygiene measures and shared-object precautions (combs, hats, brushes, bedding) to reduce spread to other household members and contacts."
      }
    ]
  },
  {
    "article_id": 340,
    "article_title": "Varicella Zoster",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Varicella is suspected in a child with a brief prodrome of low-grade fever and malaise followed by a pruritic rash appearing in successive crops — typically about three — spreading centrifugally from the trunk and scalp outward, with lesions at multiple stages (papule, vesicle with a red halo, cloudy fluid, crust) present simultaneously. In a vaccinated child, breakthrough varicella is kept in mind if the rash looks milder or atypical. The timing of any maternal varicella exposure during pregnancy or around delivery is asked about: infection in the first half of pregnancy (especially 8-20 weeks) raises concern for fetal varicella syndrome (limb hypoplasia, dermatomal skin scarring, eye disease, CNS damage), while maternal varicella from 5 days before to 2 days after delivery risks severe, potentially fatal neonatal disease and needs urgent neonatal assessment."
      },
      {
        "title": "Diagnosis",
        "content": "Diagnosis is usually clinical with an exposure history; if confirmation is needed, PCR or direct fluorescent antibody of vesicular fluid or a scab scraping is used. An initial leukopenia followed by lymphocytosis and mildly elevated liver enzymes is expected if labs are drawn."
      },
      {
        "title": "Management",
        "content": "A child with varicella is kept in isolation until all lesions have crusted, or a minimum of 5 days if crusting is earlier; in a healthcare setting, an exposed, susceptible contact is placed under airborne and contact precautions in a negative-pressure room from days 8-21 after exposure (up to 28 days if they received varicella-zoster immune globulin). Supportive care is adequate for a healthy child; acyclovir/valacyclovir is reserved for adolescents, unvaccinated children 12 years or older, those with chronic skin or lung disease, and immunocompromised children, since these agents shorten disease duration. Urgent neonatal assessment is arranged when maternal varicella around delivery places the newborn at risk."
      }
    ]
  },
  {
    "article_id": 341,
    "article_title": "Toxoplasmosis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Congenital toxoplasmosis is considered in any infant with hepatosplenomegaly, microcephaly or macrocephaly, abnormal tone, seizures, or intrauterine growth restriction, and specifically in any infant under 1 year with undiagnosed neurologic disease, especially when retinal lesions are present. A normal newborn exam does not exclude infection - most infected infants look normal at birth."
      },
      {
        "title": "Diagnosis",
        "content": "CSF analysis, a dilated eye exam, and CNS imaging are pursued when suspicion is raised by maternal history or other findings. On imaging, diffuse intracranial calcifications and hydrocephalus are sought; periventricular calcification on head CT should prompt toxoplasmosis serology alongside consideration of rubella, CMV, and herpes simplex. Hydrocephalus may be the only sign of congenital toxoplasmosis and typically requires shunt placement regardless of other findings. In an older child or adolescent presenting with visual symptoms, ocular toxoplasmosis is evaluated with T. gondii IgG/IgM serology plus dilated eye examination looking for focal necrotizing retinochoroiditis adjacent to a chorioretinal scar; PCR of aqueous humor can confirm the diagnosis but is rarely needed."
      },
      {
        "title": "Management",
        "content": "Confirmed [[155|congenital infection]] is treated with pyrimethamine, sulfadiazine, and folinic acid."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are counseled that congenitally infected children who appear normal in infancy remain at risk for [[343|visual impairment]], [[114|learning disability]], or [[248|hearing loss]] emerging later, often in the second or third decade of life, so long-term ophthalmologic and developmental follow-up is warranted even after an initially reassuring newborn evaluation."
      }
    ]
  },
  {
    "article_id": 342,
    "article_title": "Absence Seizure",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Absence seizures are suspected in a child, typically 4-12 years old, with brief (a few seconds to about 20 seconds) episodes of staring or behavioral arrest, abrupt in onset and offset, without aura or postictal confusion, sometimes with subtle eye flutter, lip smacking, or other automatisms. Because episodes are often missed by the child and family, specific questioning about frequent daydreaming, inattention, or new school performance problems is warranted, since these can be the presenting complaint. If a child presents in a prolonged confused or dreamy state lasting hours, absence status epilepticus is considered and treated with a benzodiazepine."
      },
      {
        "title": "Diagnosis",
        "content": "Diagnosis is confirmed with EEG showing the classic 3-Hz generalized spike-and-slow-wave discharge; hyperventilation for 3-4 minutes is a simple office and EEG-lab maneuver that reliably provokes the seizure and supports the diagnosis. A normal neurologic exam and normal intelligence are expected in typical CAE — a finding of true falls, myoclonus, or developmental regression should instead raise concern for atypical absence or another [[206|epilepsy]] syndrome and prompt neurology referral."
      },
      {
        "title": "Management",
        "content": "Ethosuximide is started as first-line therapy for confirmed absence seizures; valproate or lamotrigine are reasonable alternatives. Carbamazepine is avoided, as it can worsen absence seizures."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are counseled that the prognosis is excellent — over 90% of children become seizure-free with treatment, with remission typically by age 12 — but that seizures can occur many times a day until controlled, which can affect learning and carries some injury risk in the interim."
      }
    ]
  },
  {
    "article_id": 343,
    "article_title": "Visual Impairment",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "By 3-6 months of age, persisting wandering nystagmus or poor visual regard/tracking should prompt urgent ophthalmology referral. In the first 1-2 years, persistent excessive tearing and eye redness, significant strabismus, and leukocoria (white pupillary reflex) are treated as red flags requiring prompt evaluation. Amblyopia - the most common cause of unilateral, preventable, permanent visual impairment in developed countries, affecting up to 5% of the population - is often insidious and will not be caught without systematic vision screening, so parental observation alone is not relied upon to exclude it. If an infant has poor eye contact, fails to fixate and follow, is unresponsive to visual threat, or shows wandering/roving eye movements with a normal eye exam (normal pupillary responses and eye movements on structural exam), cortical visual impairment from perinatal hypoxia, prematurity, hydrocephalus, congenital CNS anomaly, trauma, [[379|intracranial hemorrhage]], or periventricular leukomalacia is considered."
      },
      {
        "title": "Diagnosis",
        "content": "Visual behavior is screened at every well-child visit, since early detection of significant visual impairment - and of conditions that risk permanent vision loss if untreated - is one of the primary care clinician's most important responsibilities here. When abnormal eye movements are evaluated, they are characterized as rhythmic/swinging versus nonrhythmic, with waveform, direction, amplitude, frequency, velocity, and symmetry between the two eyes described, noting any associated nonocular muscle movement - vertical nystagmus in particular raises concern for a posterior fossa lesion. Referral to ophthalmology is made to determine etiology, and electroretinogram, visual evoked potential testing, brain imaging, and genetics/neurology consultation are pursued as indicated."
      },
      {
        "title": "Management",
        "content": "Once a vision-impairing condition without medical or surgical treatment is identified, early referral for tailored educational intervention, environmental modification, low-vision devices, and family support services is arranged rather than delaying care while awaiting a precise etiologic diagnosis."
      }
    ]
  },
  {
    "article_id": 344,
    "article_title": "Acrocyanosis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "The distribution is examined first: acrocyanosis is confined to the hands, feet, and perioral/circumoral area, with the tongue, mucous membranes, and trunk remaining pink — this alone distinguishes it from central cyanosis, which involves the skin, lips, and tongue and needs prompt cardiorespiratory evaluation. Acrocyanosis in a newborn is expected in the first 6-24 hours of life (up to 1-2 days, or 24-48 hours with cold stress) and resolves with warming; in an older, normothermic infant, hypovolemia is considered. When a caregiver reports an alarming episode with crying, vomiting, coughing, or breath-holding, a careful history is taken and mental status change is observed for — true acrocyanosis occurs without major mental status change and the child otherwise looks well, whereas seizure, apnea, arrhythmia, or a congenital heart defect need to be excluded when the story or exam does not fit this pattern. If acrocyanosis appears in an adolescent, especially with other signs of autonomic dysfunction (orthostatic symptoms, cold limbs, excessive sweating), it is considered in that broader context rather than assuming a purely neonatal or cold-exposure cause."
      },
      {
        "title": "Diagnosis",
        "content": "Proper lighting is used, and diagnosis is confirmed with pulse oximetry rather than visual assessment alone, since visual assessment is not a reliable indicator of true oxygen saturation. If cyanosis extends beyond the classic distribution, persists beyond the first few minutes of life, or is accompanied by poor perfusion, mottling, or a change in mental status, oxygen desaturation is documented with pulse oximetry, and pre/postductal saturations, chest radiography, ECG, hyperoxia testing, and echocardiography are considered to distinguish a cardiac from a noncardiac or pulmonary cause."
      },
      {
        "title": "Management",
        "content": "No treatment is needed for benign acrocyanosis beyond warming the infant if it is cold-triggered. Supplemental oxygen is reserved for documented desaturation below target range on pulse oximetry, not for blue-looking extremities with normal saturation. If cyanosis extends beyond the classic distribution, persists beyond the first few minutes of life, or is accompanied by poor perfusion, mottling, or a change in mental status, prompt evaluation for cardiorespiratory disease is warranted."
      }
    ]
  },
  {
    "article_id": 345,
    "article_title": "Acne Vulgaris",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a neonate with facial pustules in the first 2-4 weeks of life, neonatal cephalic pustulosis (comedones are absent) is favored when the picture is small, uniform dusky-pink papules/pustules on the face and scalp - but bacterial, viral, or fungal causes are still actively excluded, and other neonatal mimics such as milia, [[207|erythema toxicum neonatorum]], transient neonatal pustulosis, and sebaceous gland hyperplasia are considered. In an infant presenting between about 6 weeks and 1 year of age with open comedones and papules/pustules on the cheeks and chin, infantile acne is diagnosed - a true acne with a course that can last 1-2 years and a meaningful scarring risk (up to 25% of cases), so treatment is started rather than only observing. Hormonal/endocrine workup is reserved for infantile acne that is unusually severe or persistent, or accompanied by other signs of androgen or cortisol excess; routine hormonal testing is not needed otherwise."
      },
      {
        "title": "Diagnosis",
        "content": "Neonatal acne is managed with routine cleansing alone, and caregivers are reassured it resolves spontaneously within about 1-3 months without scarring."
      },
      {
        "title": "Management",
        "content": "Typical adolescent acne is started on topical therapy - a retinoid, benzoyl peroxide, and/or a topical antibiotic - as first line. For infantile acne, a topical retinoid (tretinoin cream or adapalene gel) combined with benzoyl peroxide is used as the initial regimen. Escalation to oral therapy occurs for severe or recalcitrant disease at either age: oral erythromycin (or azithromycin in infants) for more severe or refractory cases, with oral tetracyclines avoided in young children because of tooth discoloration. Oral isotretinoin is reserved for the most severe, scarring, or nodular disease at any age. Adolescents and families are counseled early about the risk of scarring and the emotional impact of acne, since both are recognized complications that argue for prompt, adequate treatment rather than a wait-and-see approach in more than mild disease."
      }
    ]
  },
  {
    "article_id": 346,
    "article_title": "Alopecia Areata",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Any child with patchy [[370|hair loss]] is examined for the characteristic features of alopecia areata: sharply circumscribed, smooth, round or oval patches of complete hair loss with otherwise normal-looking underlying skin, and exclamation-point hairs (short, tapered, easily plucked) at the margin. Extent is assessed: single small patch versus multifocal or ophiasis-pattern loss versus progression toward alopecia totalis or universalis, since more extensive disease and childhood onset both predict a worse prognosis."
      },
      {
        "title": "Diagnosis",
        "content": "Nail pitting, striations, or leukonychia are checked for. Because inflammation is not a feature of alopecia areata, the presence of scaling, crusting, redness, pruritus, or regional lymphadenopathy should raise suspicion for [[339|tinea capitis]] instead, and warrants mycologic examination for Trichophyton tonsurans. Atopy is asked about and, since alopecia areata can rarely accompany other autoimmune conditions ([[290|Hashimoto thyroiditis]], [[270|type 1 diabetes]], Addison disease, vitiligo, ulcerative colitis), further evaluation is pursued only if the history or exam suggests one of these — most children with alopecia areata have no other autoimmune disease."
      },
      {
        "title": "Management",
        "content": "Topical corticosteroids are started as first-line therapy for localized alopecia areata, with referral to dermatology for consideration of other treatments if the response is inadequate, since no therapy has strong evidence of outperforming placebo."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are counseled that about half of children regrow hair completely within about 12 months, though relapse is common, and that regrowing hairs are often initially grey before regaining color. Expectations are set based on prognostic features present: localized, later-onset disease in an older child, adolescent, or young adult carries the best prognosis, while childhood onset, an ophiasis pattern, coexisting atopy, or widespread hair loss predicts a more guarded course, including possible progression to alopecia totalis or universalis."
      }
    ]
  },
  {
    "article_id": 347,
    "article_title": "Acute Pancreatitis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a child with sudden-onset epigastric pain radiating to the back, worsened by food and accompanied by vomiting, acute pancreatitis is considered. Most children are hemodynamically stable with nonspecific symptoms and can be managed conservatively, but the minority with necrotizing or hemorrhagic disease who present in shock or with jaundice and need immediate stabilization must be recognized."
      },
      {
        "title": "Diagnosis",
        "content": "Amylase and lipase are checked and abdominal imaging is obtained (ultrasound first-line, CT or MRI as needed). The diagnosis is confirmed when at least 2 of 3 criteria are met: consistent pain, amylase/lipase at least 3 times the upper limit of normal, and imaging consistent with pancreatitis - enzyme elevation alone is not relied upon, since nonpancreatic causes of hyperamylasemia exist. A history targeted at the common pediatric causes is taken: recent blunt abdominal trauma, biliary disease/gallstones (particularly relevant with rising adolescent obesity), multisystem illness such as HUS or [[254|inflammatory bowel disease]], and medication exposure - specifically valproic acid, L-asparaginase, 6-mercaptopurine, and azathioprine - as well as alcohol use in adolescents. If a child has a second episode, or any features suggesting genetic risk (family history, PRSS1/SPINK1/CFTR-associated conditions), a structured etiologic work-up is pursued rather than assuming idiopathic disease, since children with PRSS1 mutations in particular can progress to chronic pancreatitis more quickly. Chronic pancreatitis is considered - with evaluation for exocrine insufficiency (fat malabsorption, [[354|chronic diarrhea]]) and endocrine insufficiency (diabetes symptoms) - in a child with recurrent pancreatic-type pain and imaging showing pancreatic calcification or a dilated duct; pancreatic biopsy is not the standard diagnostic step in children as it can be in adults."
      },
      {
        "title": "Management",
        "content": "Conservative management is used for hemodynamically stable children with nonspecific symptoms."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are counseled that pediatric outcomes with conservative management are favorable, with mortality under 0.4%, but that recurrent acute pancreatitis occurs in up to 10% of children after a first episode."
      }
    ]
  },
  {
    "article_id": 348,
    "article_title": "Asthma Exacerbation",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "On presentation with a possible exacerbation, the severity of obstruction and the risk of further deterioration are rapidly assessed, watching for wheezing, respiratory distress, tachypnea, and accessory muscle use, and asking about early warning signs the family may have already noticed (cough, chest tightness, retractions, audible wheeze). Exacerbations can follow two patterns — a days-long course from progressive inflammation and mucus plugging, versus an abrupt, asphyxial pattern from extreme airway hyperresponsiveness with a very high initial arterial CO2 — so a rapid or recent onset should not be falsely reassuring. High-risk features are identified on history — a prior severe exacerbation, prior ICU admission or intubation, poor controller adherence or inhaler technique, ongoing tobacco/air pollution or allergen exposure, and comorbidities such as obesity, rhinosinusitis, or food allergy — since a prior severe exacerbation is the strongest predictor of a future life-threatening episode."
      },
      {
        "title": "Diagnosis",
        "content": "Response is tracked with SpO2: a level below 92% after an hour of therapy is a good predictor that hospitalization will be needed."
      },
      {
        "title": "Management",
        "content": "Frequent bronchodilator treatments and a course of systemic (oral or intravenous) corticosteroid are started, which resolves most exacerbations. Any ongoing irritant or allergen exposure contributing to the episode is identified and removed. A written asthma action plan is provided or updated using PEFR zones relative to personal best (over 80% green, 50-80% yellow, under 50% red) with clear instructions for each zone and criteria for prompt clinician contact (severe symptoms, falling PEFR, or reduced SABA response). Follow-up is scheduled within 1-2 weeks of any hospital discharge to reassess control, reinforce the action plan, and review controller medication and inhaler technique."
      },
      {
        "title": "Prognosis and outcome",
        "content": "It is emphasized that most pediatric asthma deaths occur at home or in the community before medical care can be reached, making early home recognition and action plan adherence critical."
      }
    ]
  },
  {
    "article_id": 349,
    "article_title": "Anemia",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Clinical presentation, not the hemoglobin number alone, guides urgency and the decision to transfuse - a child with chronic, compensated blood loss can tolerate a low hemoglobin relatively well and does not automatically need transfusion on lab value alone. It is recognized that severe or rapidly developing anemia can progress to hypoxia, [[285|congestive heart failure]], end-organ damage, and death, and requires prompt evaluation and treatment; when the cause is not immediately clear, diagnostic work-up and stabilization are pursued in parallel rather than sequentially. Children with cyanotic congenital heart disease or chronic respiratory insufficiency run a higher baseline hemoglobin, so a \"normal-range\" hemoglobin in these children can still represent a clinically significant, functional anemia relative to their own baseline."
      },
      {
        "title": "Diagnosis",
        "content": "The finding is confirmed against age- and sex-specific reference ranges before proceeding, since a hemoglobin that looks low by adult standards may be entirely normal for the child's age. A focused history is taken covering diet (milk intake, iron-fortified foods), growth and feeding history, symptoms of chronic disease, malabsorption, or blood loss, personal or family history of jaundice (including neonatal jaundice), gallbladder disease, splenomegaly, or splenectomy, and the child's ethnic background (relevant to hemoglobinopathies and G6PD deficiency). The reticulocyte count and MCV are used to classify the anemia by mechanism (decreased production vs. increased destruction vs. blood loss) and by red cell size (microcytic, normocytic, macrocytic) before a broader panel of specific tests is ordered."
      },
      {
        "title": "Management",
        "content": "Yearly screening is applied in high-risk children: prematurity or low birth weight, lead exposure, exclusive breastfeeding without supplemental iron past 4 months, a diet without iron-fortified foods, feeding difficulties, or poor growth."
      }
    ]
  },
  {
    "article_id": 350,
    "article_title": "Bacteremia",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Occult or overt bacteremia is considered in a febrile child, particularly one under 2 years old with fever over 39°C and no clear source, with special attention paid to lethargy, irritability, altered mental status, tachycardia out of proportion to the fever, tachypnea or labored breathing, a bulging or depressed fontanel, nuchal rigidity, petechiae, or abdominal/flank tenderness — any of which raises concern for serious bacterial illness. Bacteremia in infants is often not accompanied by fever, and in newborns can instead present with apnea, bradycardia, respiratory dysfunction, temperature instability (fever or hypothermia), or abdominal distention. Vulnerable hosts are identified specifically — asplenic children, those with central venous catheters, neutropenic children, and those with short gut — since they carry substantially higher bacteremia risk and may have a confounding baseline tachycardia that complicates triage."
      },
      {
        "title": "Diagnosis",
        "content": "Blood cultures are obtained and vital signs are assessed carefully against age-appropriate normal ranges, since abnormal ranges vary substantially across childhood and subtle deviations can be missed without this context."
      },
      {
        "title": "Management",
        "content": "Empiric antibiotic choice is based on the most likely regional organisms for the child's age (S. pneumoniae, Staphylococcus, and H. influenzae predominate under age 2) and known local antibiotic resistance patterns, with quick adjustment if a specific risk factor points elsewhere — for example, a central venous catheter raising suspicion for coagulase-negative staphylococci, or travel/endemic exposure raising suspicion for typhoidal or nontyphoidal Salmonella or Brucella."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Most children with pneumococcal bacteremia recover spontaneously, but the roughly 3-5% who develop meningitis or the additional 5% who develop another focal infection, most often pneumonia, are monitored for closely."
      }
    ]
  },
  {
    "article_id": 351,
    "article_title": "Asymptomatic Proteinuria",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "When proteinuria is found incidentally in an otherwise well child, first classify by clinical context: if the child is acutely ill, recheck once recovered rather than pursuing work-up during the illness; if [[187|hematuria]] is also present, treat this combination as more concerning and evaluate completely. Conservative management is not appropriate when proteinuria is accompanied by edema, hypertension, hematuria, systemic complaints (rash, fever, arthralgia), or a significant family history of [[369|glomerulonephritis]] or renal failure."
      },
      {
        "title": "Diagnosis",
        "content": "In an otherwise healthy child with isolated proteinuria, the dipstick is rechecked; if repeatedly normal, no further work-up is needed. If dipstick remains positive, a urine protein-to-creatinine ratio is obtained on a first-morning sample. A ratio under 0.25 needs no further work-up. A ratio of 0.25 or higher should prompt specific evaluation for orthostatic proteinuria (paired supine and upright collections); if confirmed orthostatic, the family is reassured - this is a benign, common adolescent finding requiring no treatment or restriction. Persistent, nonorthostatic proteinuria, or any ratio of 1.0 or higher, requires a complete evaluation: urine culture, creatinine/BUN, total protein/albumin, cholesterol, C3, ANA, ASO titer, and renal ultrasound, with pediatric nephrology consultation. Total protein, albumin, cholesterol, and triglycerides are checked if [[310|nephrotic syndrome]] (proteinuria plus hypoalbuminemia, edema, and hyperlipidemia) is suspected. Complement (C3, C4) and streptococcal serology (Streptozyme, ASO, antihyaluronidase, anti-DNase B) are checked when post-streptococcal glomerulonephritis is possible (typically 4 days to 3 weeks after streptococcal pharyngitis or impetigo, with low C3/C4), and ANA testing (with low C3 and C4) is considered when SLE is a concern, particularly if hypertension or hematuria coexist."
      },
      {
        "title": "Management",
        "content": "Referral to nephrology is made and renal function is assessed (BUN, creatinine, electrolytes) when red-flag features are present. For a child followed with persistent asymptomatic isolated proteinuria who is otherwise stable, annual monitoring is arranged, with escalation to renal biopsy discussion if proteinuria exceeds 1 g/day or persists beyond 12 months."
      }
    ]
  }
]