[
  {
    "article_id": 276,
    "article_title": "Acute Pharyngitis",
    "section_id": "b582ebb634ae4745a56cf710800c9b8c",
    "section_title": "Approach to the sore throat",
    "variant": "clinical",
    "imperatives": 3,
    "content": "Given that 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. Use the clinical picture to decide who to test: 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. Confirm suspected GAS with culture (gold standard) or a NAAT before treating; 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\nTreat confirmed GAS pharyngitis 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, do not rely on throat culture (likely negative by then) — send multiple antistreptococcal antibody titers (ASO, anti-DNase B, anti-hyaluronidase) to maximize the chance of confirming antecedent GAS infection, since a third of ARF patients will not even recall having had a sore throat. Consider less common bacterial causes based on context: N. gonorrhoeae in a sexually active adolescent (treat with ceftriaxone, covering for Chlamydia co-infection), and C. diphtheriae in an unimmunized or under-immunized child with a membranous pharyngitis (treat with antibiotics plus diphtheria antitoxin, and notify 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, start with the ABCDs: secure the Airway, ensure effective Breathing, support Circulation, and assess Disability (level of consciousness via Glasgow Coma Scale or AVPU, and pupillary size/reactivity) while considering the need for empiric antidote administration and Decontamination. Obtain a bedside glucose immediately in any child with altered mental status. Get an ECG for any cardiotoxic or unknown ingestion, watching specifically for a widened QRS complex that would suggest tricyclic antidepressant toxicity and change management.\n\nDo not rely on a routine urine drug screen 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. Send a specific blood level 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, focus resources on aggressive supportive care while calling the poison control hotline (1-800-222-1222) 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, ensure 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, keep the SBI risk figures 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. Use clinical appearance and age as primary risk stratifiers — ill-appearing infants and younger infants carry substantially higher SBI risk — and remember that 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 — evaluate for an underlying [[122|immunodeficiency]], including HIV, if not already known, since this pattern is a defining feature of significant immune compromise. If [[372|HIV infection]] is confirmed, ensure PCP prophylaxis (TMP-SMX), pneumococcal conjugate vaccination, and effective antiretroviral therapy are in place, 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, consider a shorter 3-day TMP-SMX course or a single intramuscular dose of benzathine benzylpenicillin as practical alternatives."
  },
  {
    "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 - confirm and characterize it with 2D echocardiography, since this is the definitive diagnostic tool. Establish a plan for lifelong periodic re-evaluation 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, assess not only valve gradient/function but also 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. Do not routinely prescribe antibiotic endocarditis prophylaxis for an isolated BAV, even with associated simple coarctation - current guidance does not support it. If BAV is found in a child, screen first-degree relatives given the recognized familial clustering of BAV and other left-sided obstructive lesions, and counsel the family 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, first assess feeding adequacy and hydration status: weight loss, decreased stool/void frequency, and a history of poor milk supply or poor latch point toward breastfeeding jaundice. Manage this by intensifying breastfeeding support - more frequent nursing, breast pumping to augment supply and stimulate production, and lactation consultation - and supplement with expressed breast milk, donor milk, or formula if intake remains inadequate or weight loss is excessive, being careful not to undermine the mother's milk supply in the process. Apply the same AAP phototherapy/exchange transfusion thresholds used for formula-fed infants; 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, consider breast milk jaundice syndrome - a generally benign, self-limited condition that can nonetheless persist for weeks. Send total and conjugated bilirubin 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 should be 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 - obtain a 12-lead ECG before starting any empiric treatment, since management is arrhythmia-specific and subtle findings can be missed on a rhythm strip alone. Work through the rhythm 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, arrange ambulatory (Holter) monitoring for 24-48 hours or an event recorder to try to capture the episode.\n\nTake a focused history 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, systematically search for and correct reversible causes (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. For an irregularly irregular narrow-complex tachycardia, treat as atrial fibrillation/flutter with variable conduction: use synchronized cardioversion (0.5-1 J/kg) or rate control with a beta-blocker or calcium channel blocker (never both together, and avoid calcium channel blockers under age 2), but withhold cardioversion if the arrhythmia has lasted 48 hours or longer or its duration is unknown, given stroke risk from a possible atrial thrombus. Reserve unremarkable, unifocal PVCs that resolve with exercise in an otherwise well child with a normal exam for reassurance without further workup, but pursue full evaluation 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": "For acute symptoms of cannabis intoxication or panic reaction, manage with a calm environment, decreased stimulation, and reassurance; benzodiazepines are sometimes indicated for severe anxiety or agitation. Evaluate chest pain in a cannabis user on its own merits — rule out acute coronary syndrome, [[348|[[107|asthma]] exacerbation]], and [[396|pneumothorax]]/pneumomediastinum — rather than attributing it reflexively to the cannabis itself.\n\nFor suspected cannabinoid hyperemesis syndrome, first exclude other causes of recurrent vomiting, then treat with cessation of cannabis use (the single most effective intervention), antiemetics (ondansetron), and topical capsaicin; counsel the patient explicitly that abstinence, not just symptomatic treatment, is required to resolve the syndrome.\n\nFor an adolescent with a positive CRAFFT screen for marijuana, provide a brief counseling session; escalate to more intensive treatment — motivational interviewing and cognitive behavioral therapy have shown effectiveness in this age group — 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, take the opportunity at routine visits 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- Monitor hematocrit/hemoglobin and bilirubin: 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. Reassure parents 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. Obtain skull imaging (x-ray or CT) 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. Check a hematocrit/hemoglobin and monitor bilirubin serially, since a large cephalohematoma can represent a clinically significant blood loss and its resorption can precipitate or exacerbate neonatal jaundice; treat resulting [[130|hyperbilirubinemia]] with phototherapy as indicated using standard criteria.\n\nAvoid aspiration of the hematoma, which is rarely necessary and carries infection risk; if signs of infection (fever, worsening local erythema/warmth, systemic illness) develop, consider [[175|osteomyelitis]] of the skull and cover empirically for E. coli and S. aureus while pursuing further evaluation. Distinguish cephalohematoma 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, confirm it is not an encephalocele (which transilluminates, is pulsatile, and overlies a bony defect) with ultrasound or CT before assuming a benign course."
  },
  {
    "article_id": 284,
    "article_title": "Chronic Kidney Disease",
    "section_id": "19fe68f1ee104c80ac656e12f7233108",
    "section_title": "Management approach",
    "variant": "clinical",
    "imperatives": 2,
    "content": "Confirm the diagnosis 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. Stage the disease 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\nInvestigate etiology systematically: in a neonate or young infant, take a careful family history (diabetes, urinary tract disease, polycystic kidney disease, congenital [[310|nephrotic syndrome]]) since these point toward a chronic rather than acute process, and evaluate for structural causes (obstructive uropathy, dysplastic/hypoplastic kidneys, polycystic kidney disease) with appropriate imaging. In an HSCT survivor, monitor proteinuria proactively (including at day +100 post-transplant) given its strong association with nonrelapse mortality, and review the drug list for nephrotoxic exposures (calcineurin inhibitors, certain antimicrobials) that may be modifiable.\n\nScreen children with CKD — even mild-to-moderate stages — for cognitive, academic, and attention difficulties rather than assuming normal neurodevelopment, and check hearing before attributing language deficits to the kidney disease itself. Monitor for and manage renal osteodystrophy and growth impairment, and weigh medication choices (particularly corticosteroid exposure) against their contribution to these complications. If a child presents acutely with previously undiagnosed CKD, prioritize restoring electrolyte and acid-base homeostasis, treat any identifiable underlying cause, and be prepared to initiate emergent renal replacement therapy 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": "First distinguish CHF 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. Use echocardiography early to identify the specific underlying lesion or process — structural CHD, ventricular dysfunction, pulmonary hypertension, or valve disease — since this determines definitive treatment. Note the age of onset 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, treat the tachycardia 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, build the regimen 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, admit to a pediatric ICU and combine 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), escalate promptly to mechanical circulatory support (ECMO or LVAD) rather than persisting with medical therapy alone. Whenever CHF is due to a structural, correctable or palliable lesion, pursue surgical or catheter-based intervention 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, systematically screen the four DSM-5 behavior categories - aggression to people/animals, property destruction, deceitfulness/theft, and serious rule violations - and confirm at least 3 criteria within the past 12 months with at least 1 in the past 6 months, plus meaningful functional impairment. Distinguish CD from ODD by looking specifically for deliberate aggression, deceit, and serious rule-breaking with little remorse, rather than only oppositional defiance and irritability. Note the age of onset: 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\nActively screen for comorbidities that can drive presentation and require their own treatment - ADHD, mood disorders (including depression, given increased suicide risk in CD), learning disabilities, and, in more violent presentations, psychomotor seizures or psychotic symptoms. Use the ADHD/CD/bipolar disorder comparison to sharpen 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. Engage parents directly in both diagnosis and treatment planning, since children with CD do not typically seek help themselves, and address any inconsistent or overly harsh disciplinary patterns in the home 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, consider cow milk protein sensitivity and start with a time-limited elimination trial: 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. Run the trial for at least 1 month in infants with mild symptoms to allow mucosal healing before judging response; a shorter 2-week trial can be used when the picture more closely overlaps with GERD. Do not require occult-blood-positive stool, eczema, or positive allergy testing before starting the trial - 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, confirm the diagnosis with reintroduction/rechallenge under medical supervision, watching for relapse. For acute, IgE-mediated presentations (vomiting, urticaria, facial swelling, shock-like state within minutes of ingestion), manage as an allergic/anaphylactic emergency and equip the family with an epinephrine autoinjector and a medical alert bracelet going forward, with strict future avoidance. Counsel families 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 cautioning 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, apply the diagnostic criteria 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). Take a history targeting onset (after infancy favors functional; infancy-onset or delayed meconium passage favors Hirschsprung disease) and ask specifically about withholding behaviors and any recent painful precipitant, including screening for streptococcal perianal disease or, when the history raises concern, sexual abuse.\n\nOn exam, check for abdominal stool and perform a rectal exam: 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, start regular bowel/toilet training, dietary modification, sitz baths, and lubricants, reserving stimulant laxatives (senna, bisacodyl) for refractory cases, and counsel the family explicitly that treatment often needs to continue for months to years - stopping too soon is the most common reason for relapse. Screen for and address associated dysfunctional voiding/recurrent UTIs, and refer for behavioral counseling 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) - check TSH and free T4, and send antithyroglobulin and TPO antibodies, recognizing that positive antibodies support but do not confirm the diagnosis given their prevalence in unaffected people and in Graves disease. Obtain a thyroid ultrasound if the goiter is asymmetric or nodular rather than diffusely enlarged. Ask specifically about a family history of thyroid disease and screen for associated conditions (Down syndrome, Turner or Klinefelter syndrome, [[270|type 1 diabetes]], other autoimmune polyglandular features), and ensure any child with type 1 diabetes is receiving the recommended annual autoimmune thyroid screening.\n\nIf the child instead presents with hyperthyroid features (tachycardia, nervousness, heat intolerance, weight loss) without ophthalmopathy, consider hashitoxicosis rather than assuming Graves disease - order a thyroid scan/RAI uptake study, expecting low or non-homogeneous uptake in hashitoxicosis versus high diffuse uptake in Graves disease, and counsel the family that this hyperthyroid phase is typically self-limited over a period of months. Use beta-blockade for symptomatic relief during this phase as needed. Once hypothyroidism is confirmed, start levothyroxine replacement and follow thyroid function 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, consider the rare possibility of Hashimoto encephalopathy (SREAT) after excluding other causes, 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, assess pH on arrival, since it correlates with prognosis for cerebral recovery, and evaluate for and manage the pulmonary consequences of aspiration — hypoxemia, decreased compliance, bronchospasm — recognizing that ARDS is an important complication requiring close respiratory monitoring and support. Evaluate for hematologic (hemolysis, coagulopathy) and renal (acute tubular necrosis) involvement in more severe cases. In any drowning victim without an obvious traumatic mechanism or other apparent explanation, actively look for an underlying medical trigger: consider seizure as the most likely underlying cause, and obtain an ECG to evaluate for an arrhythmia or a congenitally prolonged QT interval that may have precipitated the event rather than resulted from it.\n\nFor prevention counseling, tailor the message to age: for infants, emphasize constant attendance during bathing (never leave a baby alone in a bathtub, even briefly) and securing buckets/containers of standing water; for toddlers, emphasize pool fencing (with self-closing, self-latching gates) and touch supervision (caregiver within arm's reach) whenever the child is in or near water; for adolescents, emphasize avoiding alcohol and drug use during swimming or boating and consistent, correct use of a personal flotation device while boating. If a family experiences a drowning death, provide proactive psychosocial support, 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. Ask about vaccination history as part of the workup. Consider meningitis or encephalitis in any child who appears very ill, or who has mental status changes, meningeal signs, or focal neurologic findings, and perform a lumbar puncture at any age if these features are present. Strongly consider lumbar puncture 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, first classify it 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. Perform a lumbar puncture at any age if there are clinical signs of meningitis or encephalitis (altered mental status, meningeal signs, focal findings), and have 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. Ask about vaccination status as part of your 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\nCounsel families clearly and proactively: reassure them 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%). Identify children at higher recurrence risk (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. Address antipyretic use and anticonvulsant therapy questions 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), manage it as status epilepticus while continuing to investigate the underlying febrile illness, and consider HHV-6/HHV-7 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; consider alternate diagnoses 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). Ask about vaccination history 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. Ensure readily accessible fluids are provided and consumed at regular intervals before, during, and after activity. Allow gradual acclimatization to the climate, activity intensity/duration, and any uniform or protective gear rather than introducing full-intensity activity in heat immediately. Modify activity based on conditions: decrease duration/intensity, increase break frequency and duration (preferably in shade), reschedule to cooler times of day, and provide longer recovery time between same-day sessions. Avoid or limit participation 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. Choose breathable, light-colored clothing, remove helmets between plays when applicable, and review medication lists for heat-illness-predisposing drugs (anticholinergics, antihistamines, stimulants, certain antiseizure medications) as well as supplement or drug misuse history. Ensure personnel and equipment for treating heat illness are available onsite during activities, and closely monitor participants for early signs and symptoms of developing heat illness rather than waiting for overt collapse.\n\nWhen heat illness does occur, immediately remove the athlete from the hot environment and remove excess clothing. Manage heat cramps with oral electrolyte rehydration and gentle stretching. For [[367|heat exhaustion]] or more severe cramping, check electrolytes to guide IV fluid therapy rather than rehydrating empirically. Treat heat [[334|syncope]] with fluids, cooling, and supine positioning. If [[295|heat stroke]] is suspected — core temperature above 104–105°F with CNS dysfunction — treat as an emergency: secure the ABCs, give 100% oxygen, and begin aggressive cooling immediately, while evaluating for and managing complications such as rhabdomyolysis, myoglobinuria, and acute kidney injury. Never leave a child 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, obtain a rectal temperature immediately - it is the only reliable measure of core temperature - and do not be reassured by the presence of sweating, 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\nBegin whole-body cooling immediately, before or during transport if at all possible - total body immersion in ice water is most effective; if unavailable, use ice-water towel massage, evaporative cooling with misting and fans, or cooling blankets/ice. Simultaneously secure airway, breathing, and circulation, and place monitors, a rectal temperature probe, and (in more severe cases) a Foley catheter and NG tube. Start isotonic IV/IO fluids (normal saline or lactated Ringer) - roughly 20-40 mL/kg or 800 mL/m2 in the first hour, more for exertional heat stroke - then guide further fluid by central venous pressure to avoid overload, adding vasopressors if cardiac function appears reduced. Stop active cooling once rectal temperature reaches about 38.3-38.9C (101-102F) to avoid overshooting into hypothermia. Send labs for electrolytes, renal and liver function, creatine kinase, and coagulation studies to catch rhabdomyolysis, acute kidney injury, hepatic injury, and DIC early, and admit for close monitoring given how rapidly these complications can evolve. Because treatment delay directly worsens outcomes, do not wait for confirmatory labs before starting cooling and fluid resuscitation."
  },
  {
    "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, plan a structured follow-up rather than testing immediately: monitor ALT periodically in infancy, and check HCV antibody 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). Counsel the mother 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, be aware that prolonged rupture of membranes and invasive obstetric monitoring/procedures may modestly increase transmission risk, but that 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, reassure the family that the pediatric course is generally more indolent than in adults, with lower rates of progression to cirrhosis or hepatocellular carcinoma in childhood, but also explain the long-term stakes (HCV-related liver failure is the leading cause of adult liver transplantation in the US) to support engagement with monitoring and eventual treatment. Defer antiviral treatment until after age 3, since spontaneous clearance can still occur in young children with vertically acquired infection; from age 12 onward, refer for evaluation for oral direct-acting antiviral therapy, given cure rates approaching 100% with these newer regimens. Proactively screen high-risk children — 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, rely on screening rather than waiting for symptoms - check a blood lead level 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 follow local/CDC screening recommendations given that a majority of at-risk children nationally are not currently being screened. Any measurable BLL is technically abnormal; treat levels above 10 mcg/dL 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 - identify and remediate the home environment before or alongside any pharmacologic treatment. Do not chelate for BLL under 45 mcg/dL. For BLL at or above that threshold, or for any symptomatic child, arrange hospital admission for full evaluation, decontamination planning, and chelation therapy; escalate to PICU-level care 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. Treat asymptomatic children with very high BLL (especially over 100 mcg/dL) as being at significant CNS risk and needing urgent treatment even without overt symptoms. After starting treatment, set expectations 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 — do not dismiss this as colic, reflux, or a benign startle; obtain an urgent EEG to look for hypsarrhythmia and refer promptly to [[119|pediatric neurology]], since treatment initiated early has the potential to improve long-term developmental outcome. Pursue MRI of the brain and metabolic/genetic testing 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\nDistinguish infantile spasms 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. Counsel families 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": "Use the vomiting pattern and abdominal exam 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; ask about maternal polyhydramnios 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, pursue prompt evaluation for intestinal obstruction with directed imaging rather than watchful waiting.\n\nIn an older child with a prior abdominal surgery presenting with obstructive symptoms, start with nasogastric decompression for suspected adhesive obstruction, since this can resolve symptoms and prevent progression; if the obstruction does not begin to resolve promptly, move to emergency surgical exploration rather than prolonging conservative management. Consider intussusception 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, escalate stepwise: continue or increase pancreatic enzymes and add polyethylene glycol for intermittent symptoms, move to large-volume PEG bowel lavage (oral or NG) if this fails, and reserve a therapeutic contrast enema with concurrent large-volume IV fluids for complete obstruction. For any child with severe fecal impaction, avoid milk-and-molasses, soap suds, or tap water enemas given documented serious adverse events, and consider surgical disimpaction 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, consider chronic intestinal pseudo-obstruction and evaluate 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, evaluate systematically for JIA: characterize the joint count and pattern (oligoarticular ≤4 joints vs. polyarticular ≥5 joints), note the tempo of onset (insidious vs. rapid), and look specifically for systemic features (fever, rash, hepatosplenomegaly, lymphadenopathy, serositis) that would point toward systemic JIA rather than one of the other subtypes. Remember that ANA and RF are neither required nor sufficient for diagnosis — order them to help refine subtype and guide uveitis screening, not to rule JIA in or out.\n\nIf fever is prominent, do not assume systemic JIA prematurely: treat it as a diagnosis of exclusion, pursuing a thorough infectious and oncologic workup before confirming, and note that most other JIA subtypes should not be associated with fever, so its presence should specifically raise or lower your suspicion for the systemic subtype. Watch acute phase reactants 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\nScreen for asymptomatic anterior uveitis 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. Assess for and document leg-length discrepancy and muscle atrophy at follow-up visits, since these indicate an established, chronic disease process needing more aggressive management, and address functional impact directly — ask about handwriting difficulty, morning limp, and any regression of gross motor skills, since these are practical markers of disease impact on daily life and school. Refer to [[221|pediatric rheumatology]] 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": "Maintain a high index of suspicion for neonatal HSV 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. Look specifically for cerebrospinal fluid pleocytosis, elevated liver transaminases, or coagulopathy in a septic-appearing neonate, since these findings should raise HSV alongside standard bacterial sepsis/meningitis considerations, and remember that 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, send CSF for HSV PCR (the most sensitive test for CNS disease), obtain surface/vesicle cultures or direct fluorescent antibody staining if lesions are present, and do not rely on the Tzanck smear or on serologic antibody testing, which are unhelpful in this setting. Given the time-sensitivity of outcomes, start empiric intravenous acyclovir 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. Counsel families of survivors that recurrent skin lesions are common (about 50%) in the weeks after completing the initial IV acyclovir course, and arrange close follow-up, 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 - do not assume a sports injury or sprain, particularly if symptoms fail to improve with a reasonable trial of conservative therapy (rest, activity modification) over a few weeks. Order a plain radiograph 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), obtain MRI and refer promptly 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, arrange percutaneous core-needle biopsy 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 awaiting biopsy and staging, keep Ewing sarcoma and osteoid osteoma 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. Counsel families 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, check a fecal elastase-1 level as the standard first-line screening test - remembering that a level above 100 mcg/g essentially rules out pancreatic insufficiency (99% predictive value), but that 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-test for progression to pancreatic insufficiency rather than assuming their prior sufficiency status still holds.\n\nOnce pancreatic insufficiency is confirmed, start pancreatic enzyme replacement therapy 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). Ensure the diet targets roughly 150% of normal caloric intake, considering overnight gastrostomy feeding if oral intake cannot meet this target, and start fat-soluble vitamin (A, D, E, K) supplementation given the near-universal need in this population. If the suspected etiology is chronic pancreatitis rather than CF, pursue imaging (ultrasound/CT, then ERCP/MRCP as needed) to characterize ductal anatomy and structural complications, and screen for coexisting endocrine insufficiency with fasting/postprandial glucose given the risk of diabetes developing over time. In a child with celiac disease or [[214|malnutrition]]-related pancreatic insufficiency, anticipate that enzyme dependence may resolve with adequate nutritional rehabilitation rather than being lifelong, and reassess periodically 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": "Take a careful history as the primary diagnostic tool, since migraine diagnosis rests almost entirely on history plus a normal exam rather than any test or scan. Ask specifically about family history of migraine, associated motion sickness or vertigo, headache duration and location, throbbing quality, and associated nausea/vomiting/photophobia/phonophobia, and note whether the pattern fits an episodic syndrome (cyclical vomiting, abdominal migraine, benign paroxysmal vertigo or torticollis) rather than a typical headache, particularly in a younger child.\n\nReserve neuroimaging and further workup for red flags rather than ordering them 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, use the tempo (slow march over minutes, resolving within 5–60 minutes) to distinguish it from stroke, and consider the acephalic migraine subtypes (familial hemiplegic migraine, basilar migraine, migraine aura without headache) when a stroke-like presentation lacks headache.\n\nScreen for and address coexisting anxiety, depression, and sleep disturbance 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. Reassure families 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, first use the history 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, start rehabilitation immediately rather than simply prescribing rest: ice for 20 minutes 3–4 times daily, compress without compromising perfusion, elevate the limb, use NSAIDs or acetaminophen for pain control, and begin pain-free isometric and range-of-motion exercises as soon as tolerated to prevent the deconditioning that comes from prolonged disuse. Advise against exercise for the first 5–7 days, and reserve local heat for after the acute swelling and tenderness phase has passed.\n\nFor a quadriceps contusion specifically, manage with ice and compression, add short-term crutches for moderate-to-severe injuries, and allow return to walking and activity as tolerated. For a hamstring injury, prioritize stretching and eccentric strengthening in rehabilitation given the muscle's inherent two-joint vulnerability to reinjury. Watch for the signs of myositis ossificans — 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, evaluate for [[200|concussion]] regardless of whether loss of consciousness occurred, and do not allow same-day return to play, since symptoms can evolve over the following hours. Obtain CT imaging 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. Counsel families that most concussions resolve within 7–10 days, while watching for the minority who develop persistent postconcussion symptoms beyond 28 days 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 should begin on the day of injury itself rather than being delayed: apply ice directly over the injury for 20 continuous minutes, 3–4 times per day, until swelling resolves; apply compression to limit further bleeding and swelling, taking care that it is not tight enough to impair perfusion; elevate the affected extremity to promote venous return and limit swelling; and use an NSAID or acetaminophen for analgesia. Begin pain-free isometric strengthening and range-of-motion exercises 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. Reserve renal biopsy and closer secondary-cause workup 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\nManage the practical complications proactively rather than only treating the proteinuria: monitor for signs of serious bacterial infection (peritonitis, pneumonia, sepsis), particularly from encapsulated organisms, given urinary immunoglobulin losses, and maintain a high index of suspicion for thrombosis (renal vein, cerebral venous sinus, pulmonary veins) given the hypercoagulable state — even though absolute risk in children (2–5%) is lower than in adults, the consequences can be severe. Recognize the paradox of nephrotic syndrome fluid status: 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, pursue biopsy and a secondary-cause workup (infectious serologies, ANA/complement, medication history) 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": "Screen for OSAS 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, and specifically examine for tonsillar hypertrophy, adenoidal facies, micrognathia, and growth parameters (failure to thrive or obesity), plus blood pressure. Refer for polysomnography 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, refer for adenotonsillectomy as first-line treatment; add CPAP for children who are poor surgical candidates or who have persistent OSA after surgery. Counsel families 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 — screen specifically for coexisting OSA, since the two conditions frequently overlap and untreated OSA can be contributing to asthma instability; confirm with polysomnography before starting CPAP, since CPAP helps genuine coexisting apnea but can disrupt sleep if apnea is not actually present. Manage [[98|allergic rhinitis]] and nasal congestion 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: check for proptosis, pain with eye movement, and limitation of extraocular movement. If any of these are present, treat as orbital [[353|cellulitis]] - hospitalize immediately for IV antibiotics, obtain a CT of the orbits and sinuses, and involve ophthalmology (and otolaryngology if sinus disease is found) - do not attempt outpatient management. 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. Reserve hospitalization/IV antibiotics for infants under 1 year old, toxic-appearing children, those who cannot tolerate oral medication, or those who fail an outpatient trial. Reassess at 24 hours: if there has been no clinical response, or if orbital involvement is newly suspected, obtain CT imaging of the sinuses and orbits and escalate to IV antibiotics. Ask specifically about antecedent trauma, insect bites, primary skin lesions, and recent upper respiratory or sinus symptoms to help identify the likely source and organism, and have 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."
  }
]