[
  {
    "article_id": 276,
    "article_title": "Acute Pharyngitis",
    "section_id": "b582ebb634ae4745a56cf710800c9b8c",
    "section_title": "Approach to the sore throat",
    "variant": "clinical",
    "imperatives": 3,
    "content": "Because over 90% of pediatric sore throat with fever is viral, the central clinical task is identifying the minority of patients who have GAS pharyngitis and would benefit from antibiotics, while avoiding unnecessary antibiotic use in the rest. The clinical picture is used to decide who is tested: sore throat plus tender/enlarged cervical nodes, tonsillar exudates, or fever above 38.3°C raises suspicion for GAS, while concurrent coryza, cough, conjunctivitis, hoarseness, oral ulcers, rash, or diarrhea argues for a viral cause and against testing or treating for GAS. Suspected GAS is confirmed with culture (gold standard) or a NAAT before treatment; a rapid antigen test can be used but has lower sensitivity than culture, so a negative rapid test in a high-suspicion patient may warrant backup culture depending on local practice.\n\nConfirmed GAS pharyngitis is treated with penicillin or amoxicillin (azithromycin, erythromycin, or clindamycin as second-line alternatives), both to shorten the clinical course and to prevent [[194|acute rheumatic fever]], which remains the reason GAS diagnosis matters even though it is now rare in the US. If a patient presents weeks after a sore throat with new joint, cardiac, neurologic (chorea), or skin findings suggestive of ARF, throat culture is not relied upon (likely negative by then) — multiple antistreptococcal antibody titers (ASO, anti-DNase B, anti-hyaluronidase) are sent instead to maximize the chance of confirming antecedent GAS infection, since a third of ARF patients will not even recall having had a sore throat. Less common bacterial causes are considered based on context: N. gonorrhoeae in a sexually active adolescent (treated with ceftriaxone, covering for Chlamydia co-infection), and C. diphtheriae in an unimmunized or under-immunized child with a membranous pharyngitis (treated with antibiotics plus diphtheria antitoxin, with notification of public health)."
  },
  {
    "article_id": 277,
    "article_title": "Acute Poisoning",
    "section_id": "8af33db44e9244afaf9ae8d9fb4137b6",
    "section_title": "Initial approach at the bedside",
    "variant": "clinical",
    "imperatives": 2,
    "content": "For any child presenting with known or suspected poisoning, management begins with the ABCDs: the Airway is secured, effective Breathing is ensured, Circulation is supported, and Disability is assessed (level of consciousness via Glasgow Coma Scale or AVPU, and pupillary size/reactivity), while the need for empiric antidote administration and Decontamination is considered. A bedside glucose is obtained immediately in any child with altered mental status. An ECG is obtained for any cardiotoxic or unknown ingestion, watching specifically for a widened QRS complex that would suggest tricyclic antidepressant toxicity and change management.\n\nA routine urine drug screen is not relied upon to rule out poisoning - it misses many important toxins (cyanide, clonidine, organophosphates, beta-blockers, calcium channel blockers, iron), so a negative screen should never be used to dismiss clinical suspicion. A specific blood level is sent when a particular agent is suspected and a level is clinically actionable (e.g., acetaminophen, given its silent Phase 1 presentation and the importance of early identification before hepatotoxicity in Phase 2). Since most substances lack a specific antidote, resources are focused on aggressive supportive care while the poison control hotline (1-800-222-1222) is called for substance-specific guidance on decontamination, antidote use if one exists, and disposition. In any child under 5 with an unexplained or repeated ingestion, or any presentation raising suspicion for an intentional or non-accidental cause, appropriate psychosocial and safety evaluation is initiated alongside the medical workup."
  },
  {
    "article_id": 278,
    "article_title": "Bacterial Infection",
    "section_id": "82c01d5bff3b4633aa4e72f00d0d0160",
    "section_title": "Approach to the febrile infant",
    "variant": "clinical",
    "imperatives": 1,
    "content": "When evaluating a febrile neonate or young infant, the SBI risk figures are kept in mind to calibrate the workup: overall SBI risk is 7–13%, driven mostly by UTI (5–13%), with [[350|bacteremia]] (1–2%) and meningitis (0.2–0.5%) less common but higher stakes. Because E. coli is the leading cause of SBI at every site (UTI, bacteremia, and meningitis) and GBS is the second most common cause of bacteremia/meningitis, empiric antibiotic choices in this age group should reliably cover both organisms until culture results return. Clinical appearance and age serve as primary risk stratifiers — ill-appearing infants and younger infants carry substantially higher SBI risk — and the IBI/UTI distinction matters practically: a well-characterized UTI can often be managed with oral antibiotics, while bacteremia or meningitis requires parenteral therapy and closer inpatient monitoring.\n\nIn a child with recurrent bacterial infections — 2 or more episodes of sepsis, meningitis, pneumonia, internal abscess, or bone/joint infection — an underlying [[122|immunodeficiency]], including HIV, is evaluated for if not already known, since this pattern is a defining feature of significant immune compromise. If [[372|HIV infection]] is confirmed, PCP prophylaxis (TMP-SMX), pneumococcal conjugate vaccination, and effective antiretroviral therapy are ensured, since these measures have substantially reduced recurrent bacterial infection frequency compared with historical rates of around 15%. For simple, uncomplicated cutaneous bacterial infections where adherence to a multi-day oral regimen is a concern, a shorter 3-day TMP-SMX course or a single intramuscular dose of benzathine benzylpenicillin is considered as a practical alternative."
  },
  {
    "article_id": 279,
    "article_title": "Bicuspid Aortic Valve",
    "section_id": "649fb30245de45ca92561d5b3e5e9673",
    "section_title": "Follow-up and surveillance at the bedside",
    "variant": "clinical",
    "imperatives": 1,
    "content": "When BAV is identified - whether incidentally on exam (systolic ejection click, suprasternal thrill, or a soft systolic murmur) or on echocardiography performed for another reason such as coarctation screening - it is confirmed and characterized with 2D echocardiography, since this is the definitive diagnostic tool. A plan for lifelong periodic re-evaluation is established even in an asymptomatic child or adolescent, because valvar calcification/sclerosis can begin as early as the teenage years and roughly three-quarters of BAV patients eventually develop clinically significant stenosis or regurgitation over their lifetime.\n\nAt each surveillance echocardiogram, valve gradient/function is assessed along with the aortic root and ascending aorta, since BAV carries an intrinsic aortopathy (sometimes cystic medial necrosis) independent of valve function, predisposing to progressive dilation and, rarely, dissection. Antibiotic endocarditis prophylaxis is not routinely prescribed for an isolated BAV, even with associated simple coarctation - current guidance does not support it. If BAV is found in a child, first-degree relatives are screened given the recognized familial clustering of BAV and other left-sided obstructive lesions, and the family is counselled that the condition, while common and often benign for years, requires committed long-term follow-up rather than a one-time reassurance."
  },
  {
    "article_id": 280,
    "article_title": "Breastfeeding Jaundice",
    "section_id": "ba8ffbc540b8453d8d83bffd5fdd3837",
    "section_title": "Approach at the bedside",
    "variant": "clinical",
    "imperatives": 2,
    "content": "In a jaundiced neonate in the first week of life, feeding adequacy and hydration status are assessed first: weight loss, decreased stool/void frequency, and a history of poor milk supply or poor latch point toward breastfeeding jaundice. This is managed by intensifying breastfeeding support - more frequent nursing, breast pumping to augment supply and stimulate production, and lactation consultation - with supplementation by expressed breast milk, donor milk, or formula if intake remains inadequate or weight loss is excessive, taking care not to undermine the mother's milk supply in the process. The same AAP phototherapy/exchange transfusion thresholds used for formula-fed infants apply; breastfeeding can typically continue during treatment.\n\nIf jaundice instead becomes evident after the first week in an infant who is thriving, feeding well, and gaining weight appropriately, breast milk jaundice syndrome is considered - a generally benign, self-limited condition that can nonetheless persist for weeks. Total and conjugated bilirubin are sent after 3 weeks of age to exclude other causes; a conjugated fraction over 1.5 mg/dL or more than 20% of total bilirubin, jaundice persisting beyond 2 weeks with acholic stools or dark urine, should prompt urgent evaluation for biliary atresia rather than being attributed to breast milk jaundice. Any infant discharged before 72 hours of age is reassessed within 48 hours specifically for adequacy of breastfeeding and progression of jaundice, since early detection of breastfeeding jaundice - not sun exposure, which is not an effective treatment - is what prevents progression to dangerous bilirubin levels and kernicterus."
  },
  {
    "article_id": 281,
    "article_title": "Cardiac Arrhythmia",
    "section_id": "865cdf17dc7f48beab033dde8520b3d4",
    "section_title": "Approach at the bedside",
    "variant": "clinical",
    "imperatives": 1,
    "content": "When an arrhythmia is suspected in a child - whether from a caregiver report of an irregular heartbeat, palpitations, [[334|syncope]], or incidental findings on exam - a 12-lead ECG is obtained before any empiric treatment is started, since management is arrhythmia-specific and subtle findings can be missed on a rhythm strip alone. The rhythm is worked through systematically: is it fast or slow for the child's age (using age-specific thresholds), is it regular or irregular, and what is the relationship between P waves and QRS complexes. If the presenting complaint is paroxysmal and the resting ECG is normal, ambulatory (Holter) monitoring for 24-48 hours or an event recorder is arranged to try to capture the episode.\n\nA focused history is taken addressing onset/offset pattern (abrupt suggests true arrhythmia, gradual suggests normal variation), associated symptoms (syncope, dizziness, chest pain, dyspnea), specific triggers (exercise, startle, swimming - raising concern for an inherited channelopathy), and family history of sudden death, pacemaker, deafness, or seizures. In an acutely unstable child with any arrhythmia, reversible causes are systematically searched for and corrected (the H's and T's - hypovolemia, hypoxia, acidosis, hypoglycemia, potassium derangement, hypothermia, tension [[396|pneumothorax]], tamponade, toxins, or thrombosis) before or alongside arrhythmia-specific treatment. An irregularly irregular narrow-complex tachycardia is treated as atrial fibrillation/flutter with variable conduction: synchronized cardioversion (0.5-1 J/kg) or rate control with a beta-blocker or calcium channel blocker is used (never both together, and calcium channel blockers are avoided under age 2), but cardioversion is withheld if the arrhythmia has lasted 48 hours or longer or its duration is unknown, given stroke risk from a possible atrial thrombus. Unremarkable, unifocal PVCs that resolve with exercise in an otherwise well child with a normal exam are reserved for reassurance without further workup, while full evaluation is pursued for any child with syncope, a family history of sudden death, or known/suspected structural heart disease."
  },
  {
    "article_id": 282,
    "article_title": "Cannabis Use Disorder",
    "section_id": "800c3417326e4826a1d0516c52151908",
    "section_title": "Management",
    "variant": "clinical",
    "imperatives": 1,
    "content": "Acute symptoms of cannabis intoxication or panic reaction are managed with a calm environment, decreased stimulation, and reassurance; benzodiazepines are sometimes indicated for severe anxiety or agitation. Chest pain in a cannabis user is evaluated on its own merits — acute coronary syndrome, [[348|[[107|asthma]] exacerbation]], and [[396|pneumothorax]]/pneumomediastinum are ruled out — rather than attributing it reflexively to the cannabis itself.\n\nFor suspected cannabinoid hyperemesis syndrome, other causes of recurrent vomiting are excluded first, then treatment consists of cessation of cannabis use (the single most effective intervention), antiemetics (ondansetron), and topical capsaicin; the patient is counselled explicitly that abstinence, not just symptomatic treatment, is required to resolve the syndrome.\n\nFor an adolescent with a positive CRAFFT screen for marijuana, a brief counseling session is provided; escalation to more intensive treatment — motivational interviewing and cognitive behavioral therapy have shown effectiveness in this age group — is based on the duration and frequency of use. For cannabis withdrawal syndrome (irritability, anger, sleep disturbance, decreased appetite, restlessness, depressed mood, plus a physical symptom, emerging about a week after stopping heavy near-daily use), behavioral therapy is the mainstay, with buspirone and gabapentin used adjunctively in some cases. Given how common cannabis use is among adolescents, routine visits are used as an opportunity to provide direct education on the short- and long-term health hazards of use, including the cognitive, respiratory, psychiatric, and educational-attainment risks described above."
  },
  {
    "article_id": 283,
    "article_title": "Cephalohematoma",
    "section_id": "2d6b6b25312442629f54d19e740d496b",
    "section_title": "In short",
    "variant": "short",
    "imperatives": 1,
    "content": "- Cephalohematoma is a subperiosteal hemorrhage from ruptured blood vessels traversing the skull to the periosteum, classically confined below the periosteum of a single cranial bone — it never crosses suture lines, which is the key distinguishing feature from caput succedaneum.\n- Incidence estimates range from about 0.4–2.5% of live births (commonly cited as roughly 1–2.5%); it is more common in males and with instrumental delivery — about 4–5 times more common with forceps, 8–9 times with vacuum extraction, and 11–12 times with combined forceps-plus-vacuum delivery.\n- Overlying skin is intact with no discoloration, petechiae, or hemorrhage; because bleeding is slow, swelling is often delayed, appearing hours to days after birth and becoming more prominent once initial scalp edema (caput) subsides.\n- The mass is initially firm, becoming more fluctuant after about 48 hours, with a palpable rim/ridge around the edges that can create a false sensation of central skull [[204|depression]].\n- Most cephalohematomas are unilateral (bilateral is possible) and resolve over about 2–6 weeks (sources cite 2–3 weeks up to several months, or 3–4 weeks depending on size); they may calcify at the edges (often starting by the end of week 2), sometimes leaving a residual bony bump or, rarely, a persistent cystlike diploic defect visible on imaging for months to years.\n- An underlying linear (non-depressed) skull fracture is associated with roughly 5–25% of cases (estimates vary by source); imaging (skull x-ray or CT) is not routinely needed and should be reserved for suspected fracture or abnormal neurologic findings.\n- Hematocrit/hemoglobin and bilirubin are monitored: significant blood loss into the hematoma can occur, and resorption of that blood can worsen neonatal jaundice.\n- Rare complications include [[175|osteomyelitis]] of the underlying skull (most often E. coli or Staphylococcus aureus) and, exceptionally, an occipital cephalohematoma being mistaken for an encephalocele (encephalocele transilluminates, is pulsatile, and has an underlying bony defect — ultrasound or CT distinguishes the two).\n- Aspiration is rarely necessary and is generally avoided given infection risk; most cases require no treatment beyond monitoring, though phototherapy may be needed if [[130|hyperbilirubinemia]] develops. Subgaleal hemorrhage is a distinct, more dangerous entity (blood between the aponeurosis and periosteum, can extend to the orbits/neck, can hold up to 70% of an infant's blood volume, and may present with coagulopathy if massive) and must not be confused with a simple cephalohematoma."
  },
  {
    "article_id": 283,
    "article_title": "Cephalohematoma",
    "section_id": "c2bea7e24c8042f296dafec1d251f877",
    "section_title": "Management",
    "variant": "clinical",
    "imperatives": 2,
    "content": "Most cephalohematomas require no specific treatment and resolve spontaneously over 2–6 weeks with observation alone. Parents are reassured proactively that the firm rim and any residual calcified bump are part of the normal resolution process and are a frequent source of unnecessary parental concern. Skull imaging (x-ray or CT) is obtained only if there is clinical suspicion of an underlying fracture (e.g., a particularly traumatic or instrumented delivery) or if abnormal neurologic findings are present — imaging is not routine for an uncomplicated cephalohematoma. Hematocrit/hemoglobin is checked and bilirubin monitored serially, since a large cephalohematoma can represent a clinically significant blood loss and its resorption can precipitate or exacerbate neonatal jaundice; resulting [[130|hyperbilirubinemia]] is treated with phototherapy as indicated using standard criteria.\n\nAspiration of the hematoma is avoided, as it is rarely necessary and carries infection risk; if signs of infection (fever, worsening local erythema/warmth, systemic illness) develop, [[175|osteomyelitis]] of the skull is considered and empiric coverage for E. coli and S. aureus is given while further evaluation is pursued. Cephalohematoma is distinguished promptly from subgaleal hemorrhage at the bedside, since the latter is a hemodynamic emergency: subgaleal hemorrhage crosses suture lines, can extend to the orbits and neck, may develop 1–6 hours after a vacuum-assisted delivery, and can sequester a large fraction of the infant's blood volume — these infants need close monitoring for hypovolemia and coagulopathy rather than the simple observation appropriate for an uncomplicated cephalohematoma. If an occipital cephalohematoma is being considered, it is confirmed not to be an encephalocele (which transilluminates, is pulsatile, and overlies a bony defect) with ultrasound or CT before a benign course is assumed."
  },
  {
    "article_id": 284,
    "article_title": "Chronic Kidney Disease",
    "section_id": "19fe68f1ee104c80ac656e12f7233108",
    "section_title": "Management approach",
    "variant": "clinical",
    "imperatives": 2,
    "content": "The diagnosis is confirmed by documenting either kidney damage markers or a GFR below 60 mL/min/1.73 m² persisting for at least 3 months — a single abnormal lab value is not diagnostic of CKD and should prompt repeat testing rather than immediate labeling. The disease is staged by GFR (and, per KDIGO, by albuminuria as well) to guide the intensity of monitoring and anticipate stage-specific complications, since certain manifestations of CKD emerge at predictable GFR thresholds regardless of the underlying cause.\n\nEtiology is investigated systematically: in a neonate or young infant, a careful family history is taken (diabetes, urinary tract disease, polycystic kidney disease, congenital [[310|nephrotic syndrome]]) since these point toward a chronic rather than acute process, and structural causes (obstructive uropathy, dysplastic/hypoplastic kidneys, polycystic kidney disease) are evaluated for with appropriate imaging. In an HSCT survivor, proteinuria is monitored proactively (including at day +100 post-transplant) given its strong association with nonrelapse mortality, and the drug list is reviewed for nephrotoxic exposures (calcineurin inhibitors, certain antimicrobials) that may be modifiable.\n\nChildren with CKD — even mild-to-moderate stages — are screened for cognitive, academic, and attention difficulties rather than assuming normal neurodevelopment, and hearing is checked before language deficits are attributed to the kidney disease itself. Renal osteodystrophy and growth impairment are monitored for and managed, and medication choices (particularly corticosteroid exposure) are weighed against their contribution to these complications. If a child presents acutely with previously undiagnosed CKD, restoring electrolyte and acid-base homeostasis is prioritized, any identifiable underlying cause is treated, and emergent renal replacement therapy is initiated if life-threatening derangements are present."
  },
  {
    "article_id": 285,
    "article_title": "Congestive Heart Failure",
    "section_id": "6906ecd111234b36b1ee4f577c5d1e28",
    "section_title": "Management at the bedside",
    "variant": "clinical",
    "imperatives": 1,
    "content": "CHF is first distinguished from its common mimics using history, exam, and chest radiograph: the absence of cardiomegaly on radiograph argues against CHF and toward asthma, [[3|bronchiolitis]], or pneumonia, while hepatomegaly, gallop rhythm, and cardiomegaly support a cardiac cause. Echocardiography is used early to identify the specific underlying lesion or process — structural CHD, ventricular dysfunction, pulmonary hypertension, or valve disease — since this determines definitive treatment. The age of onset serves as a clue: CHF appearing well before 6–8 weeks of life, or earlier than expected for a presumed shunt lesion, should prompt evaluation for coarctation of the aorta or congenital AV valve regurgitation. In an infant with a persistent heart rate above 180/min, the tachycardia is treated proactively rather than waiting for overt failure, since risk of CHF rises sharply with duration — about 20% by 36 hours and nearly 50% by 48 hours of sustained tachycardia.\n\nFor chronic outpatient management, the regimen is built around digoxin, a diuretic (furosemide or spironolactone), an ACE inhibitor (enalapril or captopril) or ARB (losartan), and a selective beta-blocker (carvedilol or metoprolol) as tolerated. For acute decompensated CHF, admission to a pediatric ICU combines general supportive measures (temperature control, oxygen, correcting acidosis, sepsis management, metabolic correction) with targeted IV therapy — diuretics (furosemide, bumetanide), inotropes (dobutamine, dopamine), phosphodiesterase inhibitors (milrinone, amrinone), and vasodilators (nitroprusside, inhaled nitric oxide) as indicated by the hemodynamic picture. If the patient fails to respond to conventional therapy (diuretics, digoxin, ACE inhibitors), escalation to mechanical circulatory support (ECMO or LVAD) follows promptly rather than persisting with medical therapy alone. Whenever CHF is due to a structural, correctable or palliable lesion, surgical or catheter-based intervention is pursued rather than accepting prolonged medical management as a long-term substitute, since surgical correction/palliation offers the best chance of the excellent prognosis and catch-up growth typically seen with treated pediatric CHF."
  },
  {
    "article_id": 286,
    "article_title": "Conduct Disorder",
    "section_id": "afa77a341d364f94b1e4c305214d6296",
    "section_title": "Approach at the bedside",
    "variant": "clinical",
    "imperatives": 1,
    "content": "When evaluating a child or adolescent for possible conduct disorder, the four DSM-5 behavior categories are systematically screened - aggression to people/animals, property destruction, deceitfulness/theft, and serious rule violations - with confirmation of at least 3 criteria within the past 12 months and at least 1 in the past 6 months, plus meaningful functional impairment. CD is distinguished from ODD by looking specifically for deliberate aggression, deceit, and serious rule-breaking with little remorse, rather than only oppositional defiance and irritability. The age of onset is noted: onset before age 10 (childhood-onset type) carries a substantially worse prognosis and should prompt more assertive intervention, while adolescent-onset (peer-influenced) type is generally more time-limited.\n\nComorbidities that can drive presentation and require their own treatment are actively screened for - ADHD, mood disorders (including depression, given increased suicide risk in CD), learning disabilities, and, in more violent presentations, psychomotor seizures or psychotic symptoms. The ADHD/CD/bipolar disorder comparison sharpens the differential when the picture is ambiguous: constant defiance with planned revenge points to CD, constant impulsivity/distractibility/motor restlessness points to ADHD, and episodic intense rages with morbid or grandiose thought content (or hallucinations) point to bipolar disorder. Parents are engaged directly in both diagnosis and treatment planning, since children with CD do not typically seek help themselves, and any inconsistent or overly harsh disciplinary patterns in the home are addressed as part of the overall management plan, alongside referral for behavioral/family therapy and treatment of identified comorbidities."
  },
  {
    "article_id": 287,
    "article_title": "Cow Milk Protein Sensitivity",
    "section_id": "89a0e3c5ca12460b849e8010ed0db2c9",
    "section_title": "Diagnostic and management approach at the bedside",
    "variant": "clinical",
    "imperatives": 2,
    "content": "In an infant with blood-streaked or mucoid stools, persistent regurgitation/vomiting, unexplained fussiness, or [[288|eczema]]/wheeze alongside GI symptoms, cow milk protein sensitivity is considered and a time-limited elimination trial is started: maternal avoidance of cow milk protein if the infant is breastfed, or a switch to an extensively hydrolyzed formula (not soy, given the high rate of soy cross-reactivity, particularly with GI-predominant presentations) if formula-fed. The trial is run for at least 1 month in infants with mild symptoms to allow mucosal healing before response is judged; a shorter 2-week trial can be used when the picture more closely overlaps with GERD. Occult-blood-positive stool, eczema, or positive allergy testing are not required before the trial is started - many infants have only spitting up or fussiness as their sole symptom, and the diagnosis rests on clinical response, not a lab test.\n\nIf symptoms resolve on elimination, the diagnosis is confirmed with reintroduction/rechallenge under medical supervision, watching for relapse. Acute, IgE-mediated presentations (vomiting, urticaria, facial swelling, shock-like state within minutes of ingestion) are managed as an allergic/anaphylactic emergency, with the family equipped with an epinephrine autoinjector and a medical alert bracelet going forward, along with strict future avoidance. Families are counselled on the generally favorable prognosis - most children with GI-predominant sensitivity are tolerant by age 2-3, and most with IgE-mediated hypersensitivity by age 4 - while being cautioned that a switch to soy formula is often not a reliable solution given frequent soy co-sensitization, and that reintroducing milk or soy at home without medical supervision in a previously reactive child carries residual risk."
  },
  {
    "article_id": 289,
    "article_title": "Functional Constipation",
    "section_id": "c042ff1c39294b46ade237205a075f23",
    "section_title": "Approach at the bedside",
    "variant": "clinical",
    "imperatives": 1,
    "content": "In a child with infrequent, painful, or large-caliber stools, the diagnostic criteria are applied directly: at least 1 month with 2 or more of infrequent defecation (≤2/week), stool retention history, painful/hard bowel movements, large-diameter stools, or a palpable rectal fecal mass (plus, in toilet-trained children, weekly fecal incontinence or toilet-obstructing stool size). A history is taken targeting onset (after infancy favors functional; infancy-onset or delayed meconium passage favors Hirschsprung disease), with specific attention to withholding behaviors and any recent painful precipitant, including screening for streptococcal perianal disease or, when the history raises concern, sexual abuse.\n\nOn exam, abdominal stool is checked for and a rectal exam performed: an enlarged, stool-filled rectum with open anal tone supports functional constipation, while a tight anal canal with an empty rectal vault (especially with a history of delayed meconium passage or failure to thrive) should raise concern for Hirschsprung disease and prompt referral for further workup (barium enema, anorectal manometry, rectal biopsy) rather than empiric constipation treatment. Once functional constipation is confirmed, regular bowel/toilet training, dietary modification, sitz baths, and lubricants are started, with stimulant laxatives (senna, bisacodyl) reserved for refractory cases, and the family is counselled explicitly that treatment often needs to continue for months to years - stopping too soon is the most common reason for relapse. Associated dysfunctional voiding/recurrent UTIs are screened for and addressed, and referral for behavioral counseling is made when withholding behavior or toileting anxiety is prominent."
  },
  {
    "article_id": 290,
    "article_title": "Hashimoto Thyroiditis",
    "section_id": "fc3a1ac5695e41d89d9a5b4a221b026d",
    "section_title": "Approach at the bedside",
    "variant": "clinical",
    "imperatives": 3,
    "content": "In a child, especially a girl, presenting with a firm, nontender, irregularly enlarged (bosselated) goiter - with or without symptoms of [[171|hypothyroidism]] (growth deceleration, fatigue, constipation, dry skin, cold intolerance, weight gain, or declining school performance) - TSH and free T4 are checked, and antithyroglobulin and TPO antibodies are sent, recognizing that positive antibodies support but do not confirm the diagnosis given their prevalence in unaffected people and in Graves disease. A thyroid ultrasound is obtained if the goiter is asymmetric or nodular rather than diffusely enlarged. A family history of thyroid disease is asked about specifically, and associated conditions are screened for (Down syndrome, Turner or Klinefelter syndrome, [[270|type 1 diabetes]], other autoimmune polyglandular features), with any child with type 1 diabetes receiving the recommended annual autoimmune thyroid screening.\n\nIf the child instead presents with hyperthyroid features (tachycardia, nervousness, heat intolerance, weight loss) without ophthalmopathy, hashitoxicosis is considered rather than assuming Graves disease - a thyroid scan/RAI uptake study is ordered, expecting low or non-homogeneous uptake in hashitoxicosis versus high diffuse uptake in Graves disease, and the family is counselled that this hyperthyroid phase is typically self-limited over a period of months. Beta-blockade is used for symptomatic relief during this phase as needed. Once hypothyroidism is confirmed, levothyroxine replacement is started and thyroid function followed periodically, while keeping in mind that a minority of adolescents (about 30%) can have spontaneous remission, so ongoing reassessment of the need for continued therapy is appropriate rather than assuming lifelong treatment from the outset in every case. If a patient with known TPO antibodies develops unexplained acute or subacute neurologic/psychiatric symptoms, the rare possibility of Hashimoto encephalopathy (SREAT) is considered after other causes are excluded, given its responsiveness to corticosteroids."
  },
  {
    "article_id": 291,
    "article_title": "Drowning",
    "section_id": "01108bd0f06f4a6e84b2f8c8edbcdd85",
    "section_title": "Immediate management",
    "variant": "clinical",
    "imperatives": 1,
    "content": "At the scene, immediate cardiopulmonary resuscitation once submersion has occurred is the single most important initial step, with prompt attention to airway, breathing, and circulation; up to 30% of drowning fatalities may be preventable with skilled on-scene resuscitation. Cold water immersion can have a protective hypothermic effect on the brain, so resuscitation efforts should generally continue even after prolonged submersion in cold water rather than being abandoned prematurely. Early intubation should be considered if there are signs of neurologic deterioration or the patient is unable to protect the airway.\n\nIn the emergency department, pH is assessed on arrival, since it correlates with prognosis for cerebral recovery, and the pulmonary consequences of aspiration — hypoxemia, decreased compliance, bronchospasm — are evaluated for and managed, recognizing that ARDS is an important complication requiring close respiratory monitoring and support. Hematologic (hemolysis, coagulopathy) and renal (acute tubular necrosis) involvement is evaluated for in more severe cases. In any drowning victim without an obvious traumatic mechanism or other apparent explanation, an underlying medical trigger is actively sought: seizure is considered the most likely underlying cause, and an ECG is obtained to evaluate for an arrhythmia or a congenitally prolonged QT interval that may have precipitated the event rather than resulted from it.\n\nPrevention counseling is tailored to age: for infants, constant attendance during bathing is emphasized (a baby should never be left alone in a bathtub, even briefly) along with securing buckets/containers of standing water; for toddlers, pool fencing (with self-closing, self-latching gates) and touch supervision (caregiver within arm's reach) are emphasized whenever the child is in or near water; for adolescents, avoiding alcohol and drug use during swimming or boating and consistent, correct use of a personal flotation device while boating are emphasized. If a family experiences a drowning death, proactive psychosocial support is provided, since this kind of sudden, unexpected death is particularly difficult to cope with."
  },
  {
    "article_id": 292,
    "article_title": "Febrile Seizure",
    "section_id": "594b6bafa0fa4732a7af126dd7f94e93",
    "section_title": "Diagnostics",
    "variant": "long",
    "imperatives": 2,
    "content": "Evaluation is guided by clinical presentation rather than routine testing in every case. Vaccination history is asked about as part of the workup. Meningitis or encephalitis is considered in any child who appears very ill, or who has mental status changes, meningeal signs, or focal neurologic findings, and a lumbar puncture is performed at any age if these features are present. Lumbar puncture is strongly considered in children younger than 12 months even without overt meningeal signs, because the clinical signs and symptoms of [[238|bacterial meningitis]] can be minimal or absent at this young age. Simple febrile seizures in an otherwise well-appearing, neurologically normal child generally do not require neuroimaging or EEG as part of routine evaluation."
  },
  {
    "article_id": 292,
    "article_title": "Febrile Seizure",
    "section_id": "65dde31a7fa9497bae5631b42594e89e",
    "section_title": "Evaluation and counseling at the bedside",
    "variant": "clinical",
    "imperatives": 2,
    "content": "When a child presents after a witnessed febrile seizure, it is first classified as simple or complex using the specific criteria — generalized, under 15 minutes, single episode in 24 hours defines simple; any focal feature, duration of 15 minutes or more, or recurrence within 24 hours makes it complex — since this classification anchors both the workup and the prognosis discussion with families. A lumbar puncture is performed at any age if there are clinical signs of meningitis or encephalitis (altered mental status, meningeal signs, focal findings), with a low threshold to perform one in any child under 12 months even without these signs, since [[238|bacterial meningitis]] can present subtly at that age. Vaccination status is asked about as part of the risk assessment. For a well-appearing, neurologically normal child with a simple febrile seizure and a clear source of fever, further workup (neuroimaging, EEG, lumbar puncture) is generally not needed.\n\nFamilies are counselled clearly and proactively: they are reassured that simple febrile seizures are common (2–5% of children), are not associated with increased mortality, hemiplegia, or intellectual disability, and that the risk of later [[206|epilepsy]] after a simple febrile seizure is low (roughly 1.5–2.4%). Children at higher recurrence risk are identified (age under 18 months, family history, multiple seizures in the same illness, or a first seizure at a relatively low temperature) so families know what to expect and are not alarmed by a recurrence. Antipyretic use and anticonvulsant therapy questions are addressed using the framework that neither continuous nor intermittent anticonvulsant therapy is routinely recommended for children with simple febrile seizures, since the treatment decision should weigh the substantial side-effect burden of anticonvulsants against the benign natural history of the condition — this is a shared decision with the family rather than a fixed protocol. If a seizure is prolonged (approaching or exceeding 30 minutes, meeting criteria for febrile status epilepticus), it is managed as status epilepticus while the underlying febrile illness continues to be investigated, with HHV-6/HHV-7 considered among the possible viral triggers in this specific scenario."
  },
  {
    "article_id": 292,
    "article_title": "Febrile Seizure",
    "section_id": "77fe10c9b834497282d601fa8002dcda",
    "section_title": "In short",
    "variant": "short",
    "imperatives": 1,
    "content": "- Febrile seizure = seizure with fever ≥38°C (100.4°F) in a child roughly 6–60 months old (ranges cited 1 month–6 or 7 years; peak 12–18 months), without CNS infection, metabolic disturbance, or prior afebrile seizure history. About 90% of affected children have their first event before age 3; alternate diagnoses are considered if onset is after age 5.\n- Overall incidence 2–5% of children — the most common convulsive disorder in young children.\n- Simple febrile seizure: generalized (no focal features), lasts under 15 minutes, occurs only once in 24 hours (two [[315|seizures]] within 30 minutes count as one episode) — accounts for about 85% (or per other sources, 70–85%) of febrile seizures.\n- Complex febrile seizure: focal features, and/or duration ≥15 minutes, and/or recurrence within 24 hours — accounts for the remaining roughly 15–30%. Meeting just one complex criterion is enough to classify it as complex.\n- Febrile status epilepticus is specifically a febrile seizure lasting longer than 30 minutes.\n- Todd paralysis (transient postictal hemiparesis on the affected side) occurs rarely, in 0.4–2% of cases.\n- More than 90% of febrile seizures are generalized, last under 5 minutes, and occur early in the illness — often before the fever itself has even been noticed.\n- Most common association is acute respiratory illness; less commonly [[168|gastroenteritis]] (especially Shigella or Campylobacter) and UTI; roseola infantum (HHV-6/HHV-7) is a classic cause, and HHV-6/HHV-7 together account for about a third of febrile status epilepticus cases; one study found a viral cause in 86% of cases.\n- Recurrence risk factors: age under 18 months at first seizure, family history of febrile seizures, multiple seizures in the same illness, and first seizure occurring at a relatively low fever (<40°C/104°F). Family history of febrile seizures is present in 25–40% of cases.\n- Risk of later [[206|epilepsy]] after any febrile seizure is about 1–3% (some sources: 3–12% by adolescence), roughly 2–5 times the risk in children without febrile seizures; risk after a simple febrile seizure specifically is about 1.5–2.4%, rising with pre-existing neurodevelopmental abnormality, complex febrile seizure type, or family history of epilepsy. Simple febrile seizures themselves show no evidence of increased mortality, hemiplegia, or [[212|intellectual disability]].\n- Lumbar puncture should be strongly considered in any child under 12 months with a febrile seizure, since signs/symptoms of [[238|bacterial meningitis]] can be minimal or absent at that age; it should be performed at any age if [[147|meningitis]]/encephalitis is clinically suspected ([[142|altered mental status]], meningeal signs, focal findings). Vaccination history is asked about as part of the evaluation."
  },
  {
    "article_id": 294,
    "article_title": "Heat-Related Illness",
    "section_id": "e7eff0c3ad6f4396aacf8b4d1fbcad96",
    "section_title": "Prevention and practical management",
    "variant": "clinical",
    "imperatives": 4,
    "content": "Prevention is the most effective intervention. Readily accessible fluids are provided and consumed at regular intervals before, during, and after activity. Gradual acclimatization to the climate, activity intensity/duration, and any uniform or protective gear is allowed rather than introducing full-intensity activity in heat immediately. Activity is modified based on conditions: duration/intensity is decreased, break frequency and duration are increased (preferably in shade), sessions are rescheduled to cooler times of day, and longer recovery time is provided between same-day sessions. Participation is avoided or limited in a child or adolescent who is currently ill or recently recovered from illness, especially gastrointestinal illness or fever, given the residual fluid deficit this creates. Breathable, light-colored clothing is chosen, helmets are removed between plays when applicable, and medication lists are reviewed for heat-illness-predisposing drugs (anticholinergics, antihistamines, stimulants, certain antiseizure medications) as well as supplement or drug misuse history. Personnel and equipment for treating heat illness are ensured to be available onsite during activities, and participants are closely monitored for early signs and symptoms of developing heat illness rather than waiting for overt collapse.\n\nWhen heat illness does occur, the athlete is immediately removed from the hot environment and excess clothing is removed. Heat cramps are managed with oral electrolyte rehydration and gentle stretching. For [[367|heat exhaustion]] or more severe cramping, electrolytes are checked to guide IV fluid therapy rather than rehydrating empirically. Heat [[334|syncope]] is treated with fluids, cooling, and supine positioning. If [[295|heat stroke]] is suspected — core temperature above 104–105°F with CNS dysfunction — it is treated as an emergency: the ABCs are secured, 100% oxygen is given, and aggressive cooling is begun immediately, while complications such as rhabdomyolysis, myoglobinuria, and acute kidney injury are evaluated for and managed. A child is never left unattended in a parked vehicle, since nonexertional heat stroke in children most often results from exactly this scenario, given how quickly vehicle interior temperature rises above ambient."
  },
  {
    "article_id": 295,
    "article_title": "Heat Stroke",
    "section_id": "c833257f94a74590a9e0768ac161a61d",
    "section_title": "Management at the bedside",
    "variant": "clinical",
    "imperatives": 3,
    "content": "In any child or adolescent with altered mental status, incoherence, or combativeness after heat exposure or exertion, a rectal temperature is obtained immediately - it is the only reliable measure of core temperature - and the presence of sweating should not be reassuring, since exertional heat stroke classically presents with hot, sweaty (not dry) skin. A rectal temperature above 40-40.6C (104-105.1F, usually >41C/106F in exertional cases) with CNS dysfunction confirms the diagnosis and mandates immediate action.\n\nWhole-body cooling is begun immediately, before or during transport if at all possible - total body immersion in ice water is most effective; if unavailable, ice-water towel massage, evaporative cooling with misting and fans, or cooling blankets/ice are used. Airway, breathing, and circulation are secured simultaneously, and monitors, a rectal temperature probe, and (in more severe cases) a Foley catheter and NG tube are placed. Isotonic IV/IO fluids (normal saline or lactated Ringer) are started - roughly 20-40 mL/kg or 800 mL/m2 in the first hour, more for exertional heat stroke - with further fluid then guided by central venous pressure to avoid overload, adding vasopressors if cardiac function appears reduced. Active cooling is stopped once rectal temperature reaches about 38.3-38.9C (101-102F) to avoid overshooting into hypothermia. Labs are sent for electrolytes, renal and liver function, creatine kinase, and coagulation studies to catch rhabdomyolysis, acute kidney injury, hepatic injury, and DIC early, and admission follows for close monitoring given how rapidly these complications can evolve. Because treatment delay directly worsens outcomes, confirmatory labs are not waited for before cooling and fluid resuscitation are started."
  },
  {
    "article_id": 296,
    "article_title": "Hepatitis C Virus Infection",
    "section_id": "9219c57baf244b5caad1e67fa9d9cf6f",
    "section_title": "Management approach",
    "variant": "clinical",
    "imperatives": 1,
    "content": "For an infant born to an HCV-infected (HCV RNA-positive) mother, a structured follow-up is planned rather than testing immediately: ALT is monitored periodically in infancy, and HCV antibody is checked at 18 months of age once passively transferred maternal antibody has had time to clear (it can otherwise persist and produce a false-positive result for up to 12+ months). The mother is counselled that breastfeeding is safe and should not be discouraged on the basis of HCV status alone, since transmission risk is equivalent between breastfed and formula-fed infants despite detectable HCV RNA in colostrum. During delivery, prolonged rupture of membranes and invasive obstetric monitoring/procedures may modestly increase transmission risk, but cesarean delivery is not protective except specifically in HIV-HCV coinfected mothers, so mode of delivery should not be altered for HCV status alone.\n\nIf a child is diagnosed with chronic HCV infection, the family is reassured that the pediatric course is generally more indolent than in adults, with lower rates of progression to cirrhosis or hepatocellular carcinoma in childhood, but the long-term stakes are also explained (HCV-related liver failure is the leading cause of adult liver transplantation in the US) to support engagement with monitoring and eventual treatment. Antiviral treatment is deferred until after age 3, since spontaneous clearance can still occur in young children with vertically acquired infection; from age 12 onward, referral is made for evaluation for oral direct-acting antiviral therapy, given cure rates approaching 100% with these newer regimens. High-risk children are proactively screened — particularly those born to mothers who inject drugs or who are HIV-coinfected — since they carry the highest transmission risk (10–20% with maternal HIV coinfection) and stand to benefit most from early identification and eventual curative treatment."
  },
  {
    "article_id": 300,
    "article_title": "Lead Poisoning",
    "section_id": "ca5cce74a5504ee588852c2a585f5471",
    "section_title": "Approach at the bedside",
    "variant": "clinical",
    "imperatives": 2,
    "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. 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.\n\nFor 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 with signs of lead encephalopathy (seizures, altered mental status, signs of raised intracranial pressure) - this is a medical emergency. Asymptomatic children with very high BLL (especially over 100 mcg/dL) are treated as being at significant CNS risk and needing urgent treatment even without overt symptoms. 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",
    "section_id": "d5c7f2e34b5b4496a918e1de4b8a2b3b",
    "section_title": "Management",
    "variant": "clinical",
    "imperatives": 1,
    "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; an urgent EEG is obtained to look for hypsarrhythmia and prompt referral is made to [[119|pediatric neurology]], since treatment initiated early has the potential to improve long-term developmental outcome. 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).\n\nInfantile 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. Families are counselled 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",
    "section_id": "0799ed472cda4f72b8d2a338fdcc8ca3",
    "section_title": "Approach at the bedside",
    "variant": "clinical",
    "imperatives": 2,
    "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.\n\nIn 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. 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.\n\nIn 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. 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."
  },
  {
    "article_id": 303,
    "article_title": "Juvenile Idiopathic Arthritis",
    "section_id": "12b967941d78474c9f276bddc5a5a534",
    "section_title": "Practical approach",
    "variant": "clinical",
    "imperatives": 2,
    "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. 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.\n\nIf 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. 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.\n\nAsymptomatic 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": 305,
    "article_title": "Neonatal Herpes Simplex",
    "section_id": "165cd40e158b4b3d8a31587dc83126e4",
    "section_title": "Approach at the bedside",
    "variant": "clinical",
    "imperatives": 2,
    "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.\n\nWhen 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. 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. Families of survivors are counselled 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",
    "section_id": "c262d405f3ae42dd86698187fdfafa5e",
    "section_title": "Approach at the bedside",
    "variant": "clinical",
    "imperatives": 2,
    "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. 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.\n\nOnce 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. Families are counselled that treatment will combine chemotherapy (typically including doxorubicin, with dexrazoxane considered to reduce cardiotoxicity) and surgical resection, that presence of metastatic disease at diagnosis is the single most important prognostic factor, and that survivors need long-term monitoring for musculoskeletal, cardiac, renal, and reproductive late effects of treatment."
  },
  {
    "article_id": 307,
    "article_title": "Pancreatic Insufficiency",
    "section_id": "17951edca92b4cf0ae37afafa5b92963",
    "section_title": "Approach at the bedside",
    "variant": "clinical",
    "imperatives": 1,
    "content": "In any child with cystic fibrosis, or with unexplained failure to thrive, [[354|chronic diarrhea]], steatorrhea, or fat-soluble vitamin deficiency, 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. 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.\n\nOnce 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",
    "section_id": "188b3fc6f9bb463c8a79ae64c9272345",
    "section_title": "Evaluation at the bedside",
    "variant": "clinical",
    "imperatives": 1,
    "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.\n\nNeuroimaging 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.\n\nCoexisting 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. 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",
    "section_id": "fc35677332db47709a7eb5902782db65",
    "section_title": "Management approach",
    "variant": "clinical",
    "imperatives": 2,
    "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. 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.\n\nFor 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. 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.\n\nIf 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. 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. Families are counselled 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": 309,
    "article_title": "Muscle Contusion",
    "section_id": "69042941b94548ddbcb024dcd5a52cc2",
    "section_title": "Treatment",
    "variant": "long",
    "imperatives": 1,
    "content": "Initial management of a simple muscle contusion follows the standard soft-tissue-injury approach: ice, compression, and rest, with avoidance of exercise for 5–7 days; local heat can be introduced later to hasten healing once the acute phase of tenderness and swelling has resolved. Rehabilitation begins on the day of injury itself rather than being delayed: ice is applied directly over the injury for 20 continuous minutes, 3–4 times per day, until swelling resolves; compression is applied to limit further bleeding and swelling, taking care that it is not tight enough to impair perfusion; the affected extremity is elevated to promote venous return and limit swelling; and an NSAID or acetaminophen is used for analgesia. Pain-free isometric strengthening and range-of-motion exercises are begun as soon as they can be tolerated, since pain inhibits full muscle contraction and pain-driven disuse persisting for days to weeks leads to deconditioning that delays overall recovery. Providing written instructions and diagrams of rehabilitation exercises helps ensure the family understands and follows the plan. For a quadriceps contusion, treatment centers on icing the thigh with compression; crutches may be needed briefly for moderate-to-severe injuries, with the athlete allowed to walk as soon as the activity is tolerated. For hamstring injuries, stretching is particularly important because, as a two-joint muscle, the hamstring is inherently more susceptible to injury than single-joint muscles, and eccentric strengthening is a key component of rehabilitation. Once myositis ossificans has developed, management shifts toward protecting the affected area and allowing the heterotopic bone process to mature before considering further intervention, given the severe pain provoked by movement of the adjacent joint during the active phase."
  },
  {
    "article_id": 310,
    "article_title": "Nephrotic Syndrome",
    "section_id": "e1447014af8e41e9be0c76cbf96308d7",
    "section_title": "Management approach",
    "variant": "clinical",
    "imperatives": 1,
    "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, and a corticosteroid trial is reasonable without upfront biopsy, since more than 80% will respond. 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.\n\nThe 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.\n\nFor 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."
  },
  {
    "article_id": 311,
    "article_title": "Obstructive Sleep Apnea",
    "section_id": "02faf1300bc946c0b9e63fcfb86bd72b",
    "section_title": "Approach at the bedside",
    "variant": "clinical",
    "imperatives": 3,
    "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. 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.\n\nFor 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. Families are counselled 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.\n\nIn 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; confirmation with polysomnography precedes starting CPAP, since CPAP helps genuine coexisting apnea but can disrupt sleep if apnea is not actually present. [[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."
  },
  {
    "article_id": 312,
    "article_title": "Periorbital Cellulitis",
    "section_id": "1faa283fd6834d15a03aec6481317b4e",
    "section_title": "Approach at the bedside",
    "variant": "clinical",
    "imperatives": 3,
    "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]] - immediate hospitalization for IV antibiotics follows, a CT of the orbits and sinuses is obtained, and ophthalmology is involved (and otolaryngology if sinus disease is found) - 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.\n\nFor 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. 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 and treatment is escalated to IV antibiotics. 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, and 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."
  }
]