jTOb0rSSS.SSS.SSS./\S'SSS.SS S.SS S./\S 'SS S.SS S.SSS.SSS./\S'SSS.SSS.SSS.SSS./\S'SSS.SSS.SSS./\S'SSS.SSS.SSS.SSS./\S'SS S.SS!S.SS"S./\S#'SS$S.SS%S.SS&S.SS'S./\S('SS)S.SS*S.SS+S.SS,S./\S-'g.)/zClinical pathsaWhen a child reports cough, wheeze, or chest tightness with exercise, whether beta-agonist pretreatment controls the symptoms and whether other asthma features are present is determined first; if so, EIB is likely and formal exercise challenge testing is not always necessary. If symptoms are severe, occur with only minimal exertion, or persist despite beta-agonist pretreatment, further evaluation is pursued rather than assuming asthma - vocal cord dysfunction, exercise-induced [[385|laryngomalacia]], exercise-induced hyperventilation, restrictive chest wall disease, exercise-induced arrhythmia, exercise-induced [[143|anaphylaxis]] or reflux, and cardiac shunt lesions are considered. Two clinical patterns are distinguished: bronchospasm or poor endurance appearing during ordinary play, which signals poorly controlled persistent asthma; versus exercise-induced bronchospasm as the sole manifestation in an otherwise well-controlled child.)titlecontent DiagnosisaWhen objective confirmation is needed, a standardized exercise challenge (treadmill or cycle ergometer) is arranged rather than a methacholine challenge, since MCT cannot diagnose or exclude EIB; the child is instructed to avoid vigorous exercise for at least 4 hours beforehand to avoid a falsely negative result from the exercise refractory period. A drop in FEV1 of 15% or more from pre-exercise baseline at a postexercise interval confirms the diagnosis. ManagementaPhysical activity is not restricted in children with asthma - participation is encouraged, and instead the specific activity or environment (for example, avoiding very cold, dry air) is adjusted as needed based on asthma severity. The pattern of bronchospasm or poor endurance during ordinary play calls for starting or stepping up daily controller therapy, while exercise-induced bronchospasm as the sole manifestation is managed with pre-exercise treatment with a SABA or a leukotriene modifier taken shortly before vigorous activity, which is usually sufficient. Symptoms typically peak 5-10 minutes after stopping exercise and resolve over the next 20-30 minutes, which is useful for setting expectations with families and coaches about timing around practices and competitions.ijaIn an infant with frequent, effortless regurgitation who is otherwise well and gaining weight normally, the family is reassured that this is physiologic GER, typically peaking around 3-4 months and resolving by 12-18 months in the great majority of cases as the lower esophageal sphincter matures and the diet shifts to solids. In an older child, specific questions are asked about regurgitation into the mouth, heartburn, and dysphagia, which are the adult-type symptoms typical at this age.aWThe label GERD, and further workup, is reserved for infants or children with troublesome symptoms or complications: esophagitis-type symptoms (heartburn, regurgitation with discomfort), poor weight gain or [[246|growth failure]], or extraesophageal features such as [[199|chronic cough]], hoarseness, wheezing, or recurrent/chronic rhinosinusitis, especially in a child with a history of reflux as an infant. Esophagitis is confirmed with endoscopy and biopsy rather than treated empirically indefinitely, and alternative causes of recurrent vomiting (by age: gastroenteritis, intussusception, increased intracranial pressure, cyclic vomiting, eosinophilic esophagitis in younger children; functional dyspepsia, appendicitis, IBD, pregnancy, or disordered eating in adolescents) are ruled out before surgery is considered. Targeted testing (24-hour pH/impedance study, endoscopy, sweat chloride, bronchoscopy, or chest imaging) is pursued when the presentation is atypical, symptoms are severe, or the child is under 6 months with unexplained wheezing, rather than assuming reflux is the cause without evidence.aTreatment starts with nonpharmacologic measures in infants: feed volumes are reduced, feeds are thickened, and the infant is positioned upright after feeding. In older children, avoidance of foods that trigger symptoms and small, frequent meals are recommended. If symptoms persist or complications (esophagitis) are suspected, acid suppression (e.g., a proton pump inhibitor) is added and a prokinetic is considered if gastroparesis is present. Fundoplication is reserved for medically refractory GERD.ikanFAS is suspected in a small-for-gestational-age newborn with poor catch-up growth, abnormal tone (increased or decreased), irritability, or tremulousness. Because diagnosis is often missed until school age, suspicion is maintained in an older child who is thin, hyperactive, and shows fine-motor delay, especially with a history suggesting prenatal alcohol exposure.aFAS is confirmed using the full 4-part diagnostic framework rather than facial gestalt alone: at least 2 of 3 facial anomalies (short palpebral fissures at or below the 10th percentile, thin upper lip, smooth philtrum), growth at or below the 10th percentile (prenatal or postnatal), at least 1 structural or functional brain abnormality (small head circumference, or unexplained recurrent nonfebrile seizures), and neurobehavioral impairment. The diagnosis can be made with or without confirmed maternal alcohol use, but it is reserved for infants with a genuine history of substantial in-utero alcohol exposure plus the characteristic features - "fetal alcohol effects" is not applied loosely to children with developmental disorders who lack the clinical stigmata. Screening is directed specifically at associated structural anomalies (present in about half of affected children), particularly cardiac, neural tube, and genitourinary defects.atEvery pregnant patient is counseled that no amount of alcohol during pregnancy is considered safe, and that FAS/FASD is entirely preventable through abstinence - this is the single most impactful prevention message available. Co-occurring environmental adversity is addressed actively, since behavioral problems in children with FASD are often worsened by the same factors that may have contributed to the mother's alcohol use - toxic stress, neglect or abuse, domestic violence, homelessness, and family discord - so families are connected with appropriate psychosocial support alongside developmental and educational services.zPrognosis and outcomezFor a child already diagnosed anywhere on the FASD spectrum, expectations are set that neurocognitive and behavioral problems are lifelong, but that early recognition and therapy can meaningfully improve outcomes.iluIn a neonate presenting within the first week of life, especially within hours of delivery, with respiratory distress, apnea, or shock, early-onset GBS disease is considered — pneumonia with respiratory failure is common and can look like hyaline membrane disease on chest x-ray, and meningitis, while less common in this presentation (5-10% of cases), should still be considered. In an infant presenting between about 1 week and 3 months of age (typically 3-4 weeks) with fever, [[350|bacteremia]], or signs of meningitis, late-onset GBS disease is considered, which accounts for meningitis or occult bacteremia in about 30% of cases; focal infection (bone/joint swelling or pain, skin/soft tissue findings, respiratory symptoms) is also examined for, since [[175|osteomyelitis]], [[227|septic arthritis]], necrotizing fasciitis, pneumonia, adenitis, and [[353|cellulitis]] can all occur, albeit less commonly than bacteremia or meningitis.u;The diagnosis is confirmed by culturing blood, CSF, or a focal infection site, and white cell abnormalities like neutropenia support but do not confirm the diagnosis. When evaluating a pregnant patient's obstetric history, maternal GBS colonization (present in 15-35% of pregnant women) combined with intrapartum antibiotic prophylaxis is remembered as the basis for the 85% reduction achieved in early-onset disease — a history of untested or unscreened maternal GBS status in labor should raise the index of suspicion for early-onset disease in a symptomatic newborn.zAmpicillin is included in empiric therapy for suspected neonatal meningitis or sepsis in this age group, since it covers GBS along with Listeria and enterococci, the other major pathogens of concern at this age.aWhen counseling families after a diagnosis of invasive GBS disease, they are told directly about the risk of long-term impact: nearly half of early-onset disease survivors, and about 1 in 5 survivors of GBS meningitis specifically, have moderate to severe neurodevelopmental impairment, so early recognition and treatment matter, and close developmental follow-up is warranted after recovery.imaHPhysical examination alone is not relied upon to screen for fragile X syndrome in a young child, since the characteristic craniofacial features (long face, prominent forehead, prognathism, large ears) and macro-orchidism typically do not become apparent until the second decade of life, and macro-orchidism is rare before age 6.aA low threshold is kept for ordering fragile X DNA (CGG-repeat) analysis in any boy presenting with unexplained developmental delay, especially when accompanied by social anxiety, hyperactivity, gaze aversion, perseverative language, hand biting, or marked sensory hypersensitivity. Testing is also considered in girls with unexplained developmental delay or autism-spectrum features, since about 30% of girls with the full mutation show cognitive effects, generally milder than in boys. A thorough family history is taken, specifically asking about intellectual disability, premature ovarian failure, and adult-onset tremor/ataxia in relatives, since these can reflect premutation carriage elsewhere in the family and should prompt cascade genetic counseling.aA multidisciplinary approach centered on developmental and behavioral monitoring is arranged: routine primary care health supervision, ongoing input from a clinician experienced with fragile X syndrome, and connection to educational and behavioral health resources in the community. Associated findings - hyperextensible joints, mitral valve prolapse, and macro-orchidism developing around puberty - are anticipated and screened for as part of routine follow-up rather than waiting for symptoms to prompt evaluation. Genetic counseling is extended to the family once a diagnosis is confirmed, since the finding has implications for other relatives who may carry a premutation and be at risk for premature ovarian failure or fragile X-associated tremor/ataxia syndrome, and since future pregnancies in the family carry recurrence risk shaped by the anticipation phenomenon (repeat expansion through maternal transmission).inu In a child with weakness, fatigue, headache, nausea, vomiting, dizziness, orthostasis, or [[334|syncope]] after heat exposure or exertion, with a core temperature roughly 37.7-40°C (100-104°F) and only mild or absent CNS dysfunction, heat exhaustion is diagnosed.uThe water-depletion pattern (fever, intense thirst, hyperventilation, paresthesias) is distinguished from the salt-depletion pattern (severe muscle cramps, anorexia, diarrhea, orthostatic hypotension, [[170|hyponatremia]], hemoconcentration, low urine sodium) — the latter especially in a child with cystic fibrosis, whose sweat sodium losses do not normalize with acclimatization. Critically, this is differentiated from [[295|heat stroke]]: a core temperature above 104-105°F with stupor, coma, seizure, or other significant CNS dysfunction, hot/possibly dry skin, and hemodynamic instability signals heat stroke, a life-threatening emergency requiring immediate aggressive cooling and ICU-level care rather than the measures used for heat exhaustion.uThe child is moved to a cool environment, excess clothing is removed, and active cooling is applied with fans and ice packs or ice water over the groin and axillae. Oral rehydration with electrolyte-containing fluids is given if tolerated; IV fluids are used if oral intake is not possible. Rectal temperature is monitored continuously during cooling, with active cooling stopped once the temperature falls below about 38.9°C (102°F) or the child begins shivering, to avoid overcooling. Close attention is paid to any sign of CNS dysfunction or hemodynamic instability during treatment, since this would indicate progression to heat stroke and the need for emergency transport and intensive care. For prevention in returning athletes, the modifiable risk factors are addressed directly: acclimatization time is built in, adequate hydration and salt replacement are ensured, adequate recovery is scheduled between exercise bouts, and clothing/equipment that allows heat dissipation is chosen.zeFamilies are reassured that full recovery is expected for heat exhaustion once appropriately treated.ioaNIn a neonate with hypotonia, jitteriness, tetany, clonus, seizures, respiratory distress, or [[138|feeding difficulty]], the timing of onset is noted: before 72 hours favors a transient, birth/pregnancy-related cause (prematurity, maternal diabetes, asphyxia, hypomagnesemia), while onset after the first week favors a more lasting pathology (hypoparathyroidism/DiGeorge, high-phosphate formula or cow's milk intake, severe maternal [[326|vitamin D deficiency]]). In an older child with irritability, lethargy, muscular twitching, tremulousness, or seizures, similar screening is performed.uIonized calcium is checked (preferred over total calcium alone). Dysmorphic features or congenital heart disease are looked for as clues to DiGeorge syndrome, and an ECG is obtained to check for QT prolongation. Phosphate, PTH, 25(OH)-D, and 1,25(OH)2-D are checked to localize the cause — and magnesium is always checked, since coexisting hypomagnesemia can make hypocalcemia refractory to treatment until corrected.aMost infants are managed conservatively with early nutrition and close monitoring, since the majority remain asymptomatic. Intravenous or oral calcium replacement is given for symptomatic neonates. For chronic hypocalcemia due to hypoparathyroidism, oral calcium salts, generally combined with vitamin D, are used as the preferred long-term approach. If hypocalcemia proves resistant to standard calcium/vitamin D replacement, magnesium status is checked and corrected before calcium therapy is escalated further. Breastfeeding is favored over formula where relevant, since formula feeding is associated with a higher rate of hypocalcemia in term infants, and high-phosphate cow's milk or formula is avoided in infants at risk for late-onset hypocalcemia.ipa1In a child with dark (cola- or tea-colored) urine, urinalysis and exam are checked for the full nephritic picture - [[187|hematuria]] with red blood cell casts, proteinuria, hypertension, and edema; RBC casts essentially confirm a glomerular/vasculitic source and exclude extrarenal bleeding. Serum C3 is checked as an early branch point: low C3 with elevated ASO/streptozyme supports APSGN (the most likely diagnosis in a 4-12-year-old with a preceding pharyngitis, otitis media, or skin infection 1-6 weeks earlier), while a normal C3 shifts the differential toward IgA nephropathy, ANCA vasculitis, or anti-GBM disease. Specific questions are asked about recurrent painless macroscopic hematuria, which points to IgA nephropathy but can also be an early presentation of Alport syndrome in the first decade of life.a)Urgent escalation is warranted when a child with GN shows a rapidly progressive course - worsening renal function, especially with anemia, marked hypertension, and edema out of proportion to a typical self-limited postinfectious picture - since this raises concern for RPGN or a crescentic process requiring biopsy and consideration of immunosuppression. Pulmonary hemorrhage in a child with glomerulonephritis is treated as a medical emergency suggesting anti-GBM disease (Goodpasture syndrome) or ANCA vasculitis, since delayed treatment can be fatal.aJAdmission is arranged for renal insufficiency, oliguria, or acute hypertension, with the latter managed aggressively with fluid/salt restriction and antihypertensive therapy. For a child with biopsy-proven MPGN/C3 glomerulopathy or another chronic GN, care is coordinated with pediatric nephrology for immunosuppressive treatment.a0Families are reassured that typical APSGN has an excellent prognosis, with most children recovering fully even though microscopic hematuria can linger for up to a year, and are counseled that response in chronic GN varies by the specific underlying mechanism rather than following one predictable course.iqaEvaluation starts by classifying the pattern: diffuse versus circumscribed, and congenital versus acquired, since this framework (congenital diffuse, congenital localized, acquired diffuse, acquired localized) narrows the differential substantially. For circumscribed acquired hair loss, close examination looks for the three leading causes: a smooth, well-demarcated bald patch suggests [[346|alopecia areata]]; scaling with broken hairs (sometimes black dots) suggests [[339|tinea capitis]]; and hairs of variable, uneven length with an irregular pattern (crown, occipital, parietal areas), sometimes with scalp crusting, suggests trichotillomania. For diffuse hair loss, specific questions are asked about events 2-4 months prior (illness, surgery, childbirth, high fever, new medication, crash dieting, or major stress), since this history points to telogen effluvium. Anagen effluvium is considered in any child on chemotherapy or radiation who develops hair loss.a|A Wood lamp exam is performed if tinea capitis is suspected, but a negative result does not exclude the diagnosis, since T. tonsurans - the dominant US cause - does not fluoresce; fungal culture/microscopy follows if suspicion remains. Associated autoimmune conditions (thyroid disease, vitiligo) are screened for in alopecia areata, and the nails are checked for pitting on exam.aFor alopecia areata, topical or intradermal triamcinolone is offered. For telogen effluvium, reassurance alone is usually sufficient once the inciting stressor is identified and addressed. For tinea capitis, systemic antifungal therapy is started rather than topical treatment, since topical agents cannot penetrate the hair shaft; kerion-type presentations are treated the same way, since most respond well without incision. For trichotillomania, a strong therapeutic alliance is built with the child and family, cognitive behavioral therapy is initiated, and adjunct medication (clomipramine or N-acetylcysteine) is considered for refractory cases, recognizing the OCD-spectrum nature of the behavior.zFor telogen effluvium, reassurance is given that regrowth is expected over 6-12 months. 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