j\0rSSS.SSS.SSS.SSS./\S 'SS S.SS S.SS S.SS S./\S'SSS.SSS.SSS./\S'SSS.SSS.SSS.SSS./\S'SSS.SSS.SSS.SSS./\S'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.'SS/S.SS0S.SS1S./\S2'g3)4zClinical pathsaJDM is suspected in a child (median onset 7-11 years, bimodal peak at 3-7 years and early adolescence, girls more often than boys) with gradually progressive, symmetric proximal muscle weakness together with a heliotrope eyelid rash and/or Gottron papules over the knuckles or elbows. In a child with proximal weakness but no rash, juvenile polymyositis or muscular dystrophy is considered, since JPM is managed identically to JDM once confirmed.)titlecontent Diagnosisa(The Bohan and Peter criteria are applied: with the classic rash present, at least 3 of symmetric proximal weakness, elevated muscle enzymes (CK, AST, LDH, aldolase), characteristic EMG findings, or biopsy showing necrosis and inflammation are confirmed - though a normal CK does not exclude the diagnosis. MRI (STIR/T2 fat-saturated) is ordered as the preferred first-line imaging study to demonstrate symmetric proximal muscle inflammation (thighs, especially vastus lateralis/intermedius, more than pelvis or shoulders), with muscle biopsy or EMG reserved for diagnostically uncertain cases; the same enzyme/MRI work-up is pursued in a child with proximal weakness but no rash. The nailfolds are examined for capillary dilation with dropout, a useful supportive sign. Routine malignancy screening is not pursued in a child with JDM - unlike adult dermatomyositis, childhood disease is not a paraneoplastic syndrome. Screening is directed at extramuscular vasculopathic involvement instead: questions are asked about abdominal pain (intestinal ischemia risk), skin is monitored for ulceration, and cough or progressive dyspnea suggesting interstitial lung disease is watched for, with KL-6, anti-MDA5, anti-Jo-1, and IL-18 checked when ILD is a concern, since elevated levels flag risk for a rapidly progressive course. ManagementzEarly referral is made to [[221|pediatric rheumatology]]. In a child with skin findings alone and minimal muscle involvement (amyopathic JDM), follow-up is arranged over several years.zPrognosis and outcomeaDystrophic calcinosis is anticipated as a possible late finding (about 30% of patients), typically periarticular and appearing months to years after onset. In a child with amyopathic JDM, reassurance is given that the pediatric form, unlike the adult one, is not linked to malignancy or interstitial lung disease, but up to about a quarter go on to develop overt myositis. JDM is relatively responsive to immunosuppressive therapy, and prompt, adequate treatment improves long-term outcomes.i}uAt birth, the visible spinal defect is examined to characterize it as covered by thin epithelialized tissue or an exposed neural placode, and CSF leakage is watched for if a membrane is present, which raises infection risk and urgency for surgical closure. Bladder and bowel function are assessed specifically — constant dribbling with a relaxed sphincter versus a high-pressure bladder with dyssynergy — since both patterns require urologic involvement from the outset.aA careful neurologic exam is performed to localize the lesion level: lower-extremity tone and reflexes (flaccid paralysis and absent deep tendon reflexes below the lesion) and response to touch and pain are assessed, and associated deformities (clubfoot, hip subluxation) that reflect abnormal in-utero movement are looked for. Cranial imaging is obtained given the near-universal association with Chiari II malformation and the 80-85% likelihood of hydrocephalus requiring shunt placement.uAA multidisciplinary team is established early — neurosurgery, urology, orthopedics, genetics, physiotherapy, and a coordinating primary care physician — since myelomeningocele affects nearly every organ system and requires lifelong management rather than a single intervention. Shunt complications and infections are monitored for, particularly in infancy, given their impact on cognitive development. Motor status is tracked over time: most children remain stable postoperatively, so new neurologic deterioration should prompt evaluation for tethered cord (the most common cause, a diagnosis of exclusion), syringohydromyelia, or cervical myelopathy from Chiari II, rather than being dismissed as expected progression. Latex precautions are taken throughout care given the roughly one-third prevalence of latex hypersensitivity.aOWhen a family considering prenatal surgery is counseled, the MOMS trial findings are presented accurately: prenatal repair can reduce shunt need and improve 30-month motor outcomes but carries real maternal and fetal risk, and the evidence base, per the 2014 Cochrane review, remains insufficient to make this a routine recommendation.i~aHemostasis is addressed first with direct pressure (tourniquet only if necessary), then the wound is assessed for depth and involvement of deeper structures - special vigilance is used with any neck laceration, given the proximity of the carotid arteries, jugular veins, trachea, and esophagus. For facial or intraoral lacerations, the mechanism is asked about (a fall while running with an object in the mouth is classic for palatal injury). While any laceration is evaluated, whether the location and pattern fit the stated mechanism is noted: greater concern for abuse is warranted when injuries are patterned (loop, cord, or belt marks) or located on soft-tissue areas (ears, neck, abdomen, buttocks, genitals) rather than bony prominences, when injuries are in multiple stages of healing, or when the laceration or bruise occurs in an infant who is not yet cruising or walking - "children who don't cruise rarely bruise" is a useful reminder that unexplained injury in this age group deserves careful scrutiny rather than routine reassurance.zAny palatal or oropharyngeal laceration extending laterally is treated as a potential great-vessel injury - MR angiography is pursued if worrisome neurologic signs or symptoms develop.aAdmission for observation is arranged for any palatal or oropharyngeal laceration extending laterally, given its potential great-vessel injury risk. For a cervicofacial laceration from a dog bite, special suturing technique is anticipated, generally under conscious sedation, with general anesthesia reserved for extensive tissue defects. Topical LET (4% lidocaine, 1:2000 epinephrine, 0.5% tetracaine) is used for straightforward lacerations amenable to topical anesthesia, with 20-30 minutes allowed for effect and blanching at the site watched for as a sign of adequate anesthesia before proceeding, since fear and lack of cooperation can otherwise make repair difficult in children.iuThe history specifically covers the number of wet nights per week, the longest stretch of dryness ever achieved, evening fluid intake, daytime voiding frequency and symptoms (urgency, straining, weak stream, dribbling), constipation, and snoring or mouth breathing. The family is directly asked about a parental history of childhood bedwetting, since this is rarely volunteered but carries strong prognostic value. In a previously dry child with new-onset enuresis, abuse or a new emotional stressor is considered as a possible trigger and screened for accordingly. The child is classified as having monosymptomatic (nighttime-only) or nonmonosymptomatic (with daytime symptoms) enuresis, since this determines whether further evaluation is needed — monosymptomatic enuresis with a reassuring history and exam requires no further workup, while nonmonosymptomatic enuresis warrants closer attention to bladder/bowel dysfunction and possible urology involvement.aTOn exam, hypertension or [[246|growth failure]] (chronic renal disease) is checked for, and a genital exam is performed for meatal stenosis or labial fusion, along with an abdominal exam for an enlarged bladder or kidneys. Urinalysis and culture are sent to exclude infection, and urine specific gravity is noted to screen for a concentrating defect. Imaging (renal ultrasound, VCUG) is reserved for children over age 10 with persistent enuresis or when history/exam suggests an organic cause (obstructive symptoms, [[187|hematuria]], hypertension, growth failure), rather than ordered routinely.azTreatment starts with behavioral modification and alarm therapy as first-line treatment, particularly effective in younger children, and medication is reserved for older children, those with additional symptoms, or those who fail behavioral/alarm therapy. Constipation and ADHD are treated concurrently if present, since untreated comorbidities can undermine enuresis treatment.a1Parental history of bedwetting carries strong prognostic value: 40% risk with one affected parent, 70% with both. Families are reassured that nocturnal enuresis causes no physical harm and has a high rate of spontaneous resolution, while its emotional impact on the child is still validated and addressed.iaLaryngomalacia is suspected in an infant with inspiratory stridor beginning in the first 2-6 weeks of life that worsens with crying, feeding, agitation, and supine positioning, and improves prone and at rest - this pattern, together with normal oxygen saturation and a normal chest radiograph, supports an upper-airway (supraglottic) source rather than lower respiratory disease. Early airway examination (rather than waiting) is obtained in infants presenting under 4 weeks of age or with severe obstruction, since these presentations warrant ruling out an alternative cause. If stridor sounds wet, is accompanied by cough with feeds, or there is a history of recurrent respiratory illness or pneumonia, evaluation for dysphagia is warranted, since laryngomalacia can impair suck-swallow-breath coordination. If stridor worsens or persists beyond the expected improving trajectory instead of following the typical course, reassessment for an alternate or coexisting diagnosis (such as an enlarging subglottic hemangioma, vocal cord paralysis, or subglottic stenosis) is warranted rather than continuing to attribute symptoms to uncomplicated laryngomalacia.aDiagnosis is confirmed with awake flexible fiberoptic laryngoscopy, looking for the omega-shaped epiglottis, short aryepiglottic folds, and inspiratory prolapse of the arytenoid mucosa/cuneiform cartilage. Dysphagia is evaluated with a contrast swallow study or FEES when suspected. For infants with moderate to severe obstruction, complete bronchoscopy is performed, since 15-60% have a synchronous airway anomaly that would otherwise be missed.aFFamilies are reassured that most laryngomalacia is mild and self-limited, and is managed expectantly with positioning and treatment of any coexisting GERD. Reflux is screened for and treated, since GERD/laryngopharyngeal reflux can worsen severity and prolong the clinical course. Surgical evaluation (supraglottoplasty) is pursued for stridor at rest with retractions and increased work of breathing, or for chronic signs such as failure to thrive, [[311|obstructive sleep apnea]], hypoxemia, or severe dyspnea - these more severe presentations occur in only about 10-22% of cases.zSymptoms typically peak by about 6 months, improve from 7-9 months, and resolve completely by 12-18 months in the majority of infants.iuBroad parasitic workup is reserved for children with a specific risk factor — travel to or residence in an endemic area, daycare attendance with a known outbreak, exposure to contaminated water (well water, a pool, a stream), or pet/animal contact — rather than ordering an O&P reflexively on every child with loose stools. Giardiasis is suspected in a child with diarrhea and a history of exposure to potentially contaminated water (well water, a stream, or even a treated pool, since Giardia resists chlorination), daycare attendance, or a household contact with similar symptoms — remembering that 25% of infected individuals are asymptomatic, so an asymptomatic carrier in the household can be the ongoing source. Because pets are rarely a source of human Giardia infection (due to host-specific strain differences), exposure history focuses on water sources, daycare, and person-to-person contact rather than the family dog or cat.aBefore parasitic testing is ordered in a child with diarrhea, pretest probability is considered: more than 90% of stool O&P exams in the US are negative, and helminths are rarely the cause of diarrhea. When protozoal infection (Giardia, Cryptosporidium, Entamoeba) is genuinely suspected, molecular (PCR-based) stool testing is favored over traditional O&P microscopy, since these are now the more accurate and commonly used diagnostic approach for these organisms.a When antiparasitic treatment is selected for any confirmed parasitic infection, FDA approval status and pediatric-specific indications are verified before prescribing, since the antiparasitic drug landscape includes agents with limited approval or that are available only through the CDC.iatIn an acutely ill child, diarrhea (stool bicarbonate loss), shock/lactic acidosis (perfusion is assessed carefully - dehydration, blood loss, sepsis, and heart disease can all present this way), and DKA are considered the most common acute causes. In a child with ketosis and only mild acidosis (bicarbonate above 18 mEq/L) attributed to poor intake, a concurrent illness such as gastroenteritis is actively sought, since starvation ketosis alone rarely explains significant acidosis. Metabolic acidosis with seizures or depressed sensorium in an infant is treated as a possible inborn error of metabolism until proven otherwise, while meningitis/sepsis with lactic acidosis is considered the more common explanation when neurologic signs and acidosis coexist without a metabolic-disease history. In a child with failure to thrive and chronic acidosis, evaluation for renal insufficiency or renal tubular acidosis is undertaken. Medication exposure and possible [[338|toxic ingestion]] (ethylene glycol, methanol) are always asked about, since these are treatable causes with excellent response to specific therapy when identified promptly.aBUN, creatinine, glucose, urinalysis, and electrolytes are obtained as baseline studies, and the anion gap is calculated to narrow the differential. For DKA, glucose, urine ketones and glucose are checked. Accompanying hypoglycemia or hyperammonemia is checked for when an inborn error of metabolism is suspected. Evaluation for renal insufficiency or renal tubular acidosis includes Fanconi syndrome-associated type II RTA (normoglycemia with glycosuria) and adrenal insufficiency (acidosis with hypoglycemia).afTreatment is directed first at correcting the underlying cause - rehydration and treatment of the precipitating illness, rather than bicarbonate, resolves most cases. Fluid balance is corrected in infants with a dilutional component to their acidosis. For chronic acidosis from ongoing bicarbonate loss, bicarbonate supplementation is added directly to feeds. Reflexive intravenous sodium bicarbonate bolus for acute acidosis is avoided: it is reserved for severely unstable, persistently acidotic infants who have failed other measures, and only when the infant is intubated/ventilated or breathing well enough spontaneously to clear the resulting CO2 load, given the risks of volume overload, [[379|intracranial hemorrhage]], hypernatremia, worsened respiratory acidosis, impaired oxygen delivery, and paradoxical intracellular acidosis. Families are counseled that chronic acidosis causes reversible [[246|growth failure]], and that adequate correction (for example, in [[284|chronic kidney disease]] with bicarbonate or citrate) is important specifically for growth and bone health, not simply for normalizing a lab value.ia If an infant is not caught by screening, a characteristic musty/mousy odor, fair complexion relative to family members, [[288|eczema]], vomiting, or irritability should prompt urgent phenylalanine testing rather than waiting for developmental delay to become apparent.aWhen a newborn screen returns positive for PKU, the diagnosis is confirmed with further testing (quantitative phenylalanine level, and genetic testing as indicated). It is verified that the state's newborn screen was actually performed, given that many primary care clinicians are now unfamiliar with untreated PKU phenotypes precisely because screening has made the untreated disease rare. A urine ferric chloride test can be done acutely for an infant not caught by screening. For a newborn of a mother with known PKU, phenylalanine levels are measured once enteral feeding is established, and early quantitative amino acid analysis is considered rather than relying on routine newborn screening alone, given the child's elevated background risk (about 1 in 80) and the possibility of in-utero phenylalanine-related effects (microcephaly, congenital heart disease, intellectual disability) even in a heterozygous, unaffected infant if maternal phenylalanine control was inadequate during pregnancy.a_A low-protein diet and phenylalanine-free medical formula are started as soon as possible, without waiting for confirmatory results before beginning dietary intervention. Confirmed PKU is managed with a lifelong phenylalanine-restricted diet under the guidance of a metabolic clinic and a nutritionist experienced in PKU, aiming for good phenylalanine control by 3-4 weeks of age and sustained control thereafter. Continued breastfeeding is supported where desired, but phenylalanine levels are monitored closely given ongoing intake from breast milk. Patients and families are counseled to avoid aspartame.zDelay in starting treatment risks irreversible intellectual disability, since damage becomes irreversible by about 8 weeks of age, and sustained phenylalanine control is aimed at maximizing neuropsychological outcome.iaCafe-au-lait macules are expected from birth, freckling by adolescence in about 75% of cases, and Lisch nodules on slit-lamp exam in about 75% of prepubescent children after age 3 - so a young child may only show cafe-au-lait spots initially. In counseling families, both parents are evaluated carefully, since about half of cases are inherited (autosomal dominant, nearly full penetrance) and half are new mutations - this distinction matters for genetic counseling of the family.a]The 2-of-7 criteria are applied systematically: 6 or more cafe-au-lait macules (over 5 mm prepubertal, over 15 mm postpubertal), 2 or more neurofibromas of any type or 1 plexiform neurofibroma, axillary/inguinal freckling, optic pathway glioma, 2 or more Lisch nodules, a distinctive osseous lesion, or a first-degree relative with NF1. When a child has 6 or more cafe-au-lait macules but no other criterion yet, NF1 is not dismissed - the child is followed clinically, since about 95% eventually meet full diagnostic criteria (usually by 8-10 years of age). Referral to ophthalmology for slit-lamp exam and screening is made whenever NF1 is suspected or diagnosed, given the risk of Lisch nodules and, more importantly, optic pathway glioma (occurring in 15-20% of NF1 children, usually before age 6), which can cause visual loss or [[222|precocious puberty]].ayExpectations are set that NF1 manifestations emerge over time rather than all at once, and that about two-thirds of patients have a mild course while the remaining third face a range of unpredictable complications - so periodic, structured monitoring (rather than one-time reassurance) is the right model of care. [[114|Learning disability]] is actively screened for and addressed, since it affects 30-60% of children with NF1 and is a major driver of quality of life, independent of physical manifestations. Signs of vascular dysplasia (moyamoya arteriopathy, in 3-7% of children) are watched for if new neurologic symptoms develop.zOptic pathway and brainstem gliomas in NF1 tend to behave more indolently than in children without NF1, which can inform a more conservative initial approach to management in consultation with neuro-oncology.iuIn an adolescent at least 2 years post-menarche with irregular cycles (under 21 or over 45 days in years 1-3 post-menarche, or under 21/over 35 days or fewer than 8 cycles/year beyond that, or any cycle over 90 days), evaluation is made for PCOS. True virilization (clitoromegaly, voice change, rapidly progressive hirsutism) is specifically watched for — this is not consistent with PCOS and should prompt evaluation for a more severe androgen-excess condition instead.uEvaluation is made for both hyperandrogenism (clinical: hirsutism, moderate-to-severe acne, male-pattern alopecia; biochemical: elevated free/total testosterone, DHEA-S, androstenedione) and other causes of irregular cycles (thyroid dysfunction, hyperprolactinemia) are excluded before PCOS is diagnosed — this evaluation is done before oral contraceptives are started for the irregular cycles, since starting hormonal therapy first can mask the underlying picture. Pelvic ultrasound is not relied upon in this age group: polycystic-appearing ovaries are a normal finding in many adolescents from ongoing pubertal anovulatory cycles, so the adult ultrasound criterion should not be applied.uOnce PCOS is diagnosed, its common comorbidities are screened for, especially in an overweight or obese adolescent: lipid panel, glucose tolerance/HbA1c for type 2 diabetes risk, evaluation for [[311|obstructive sleep apnea]], and screening for depression and anxiety. Lifestyle intervention is emphasized as first-line management — even a 5-10% weight loss can meaningfully improve symptoms — and it is explained that a BMI over 30 limits fertility, so weight management also serves reproductive goals. For endometrial protection, at least 4 menstrual periods per year are ensured unless the patient is on contraception, given the endometrial cancer risk from chronic anovulation and unopposed estrogen. Further treatment (hormonal therapy, antiandrogens, metformin) is individualized based on the patient's predominant symptoms — menstrual irregularity, hyperandrogenism, or metabolic features — rather than a one-size-fits-all regimen.iN)DATAe/tmp/claude-0/-home-danvics-docker-quiz/c1e0577a-e42c-4a3d-b1ea-3edd61103a4e/scratchpad/mdm/batch4.pyr s  )ij $NO %_` "0]^  S  )EF $PQ %h i "0AB  S  )DE $^_ %U V  S  )mn $z { %ab "0cd  S  )qr $de %m n "0xy  S  )YZ $wx %GH S  )_` $ef %MN S  )wx $NO %F G "0KL  S  )LM $CD %` a "0BC  S  )CD $Z [ %YZ S r