Common Pediatric Diseases and Disorders
This second part of our comprehensive guide to congenital anomalies covers genitourinary abnormalities, musculoskeletal defects, and major chromosomal syndromes. Understanding these conditions is essential for early recognition, appropriate management, and providing comprehensive family-centered care that addresses both medical and psychosocial needs.
💧 Genitourinary Anomalies
Urinary and Genital Abnormalities
Hypospadias
- Incidence: 1 in 200-300 males
- Urethral opening on ventral side of penis
- Associated with chordee (ventral curvature)
- Management: Surgical correction at 6-18 months
- Critical: Do NOT circumcise—foreskin needed for repair
Cryptorchidism
- Incidence: 3-5% at birth
- Undescended testis
- Complications: Infertility, increased cancer risk
- Management: Orchiopexy before 12-18 months if not descended
Posterior Urethral Valves (PUV)
- Obstructing membrane in posterior urethra (males)
- Presentation: Hydronephrosis, poor urinary stream
- Diagnosis: VCUG (voiding cystourethrogram)
- Management: Surgical valve ablation
- Prognosis: Variable—can cause chronic kidney disease
Renal Anomalies
- Vesicoureteral Reflux (VUR): Backflow of urine—antibiotic prophylaxis
- Renal Agenesis: Unilateral (compatible), Bilateral (Potter sequence—lethal)
- Polycystic Kidney Disease: ARPKD (infant), ADPKD (adult)
🦴 Musculoskeletal Anomalies
Bone and Joint Abnormalities
Clubfoot (Talipes Equinovarus)
- Incidence: 1 per 1,000
- Foot turned inward and downward
- Treatment: Ponseti method—serial casting starting within first week
- Success rate: >90% with early treatment
Developmental Dysplasia of Hip (DDH)
- Risk factors: Female, breech, family history
- Screening: Barlow/Ortolani maneuvers, ultrasound at 6 weeks
- Treatment: Pavlik harness (<6 months), closed/open reduction (>6 months)
- Outcomes: Excellent with early diagnosis
Digit Anomalies
- Polydactyly: Extra digits—surgical excision if needed
- Syndactyly: Fused digits—surgical separation if impairment
Skeletal Dysplasias
- Osteogenesis Imperfecta: Brittle bones, blue sclera—bisphosphonates
- Achondroplasia: Most common dwarfism—normal intelligence
🧬 Chromosomal Abnormalities
Major Chromosomal Syndromes
Down Syndrome (Trisomy 21)
- Incidence: 1 in 700 (increases with maternal age)
- Features: Flat face, upslanting eyes, single palmar crease, hypotonia
- Medical issues: Cardiac defects (40-50%), leukemia risk, hypothyroidism
- Management: Cardiac echo, thyroid screening, early intervention
- Life expectancy: 60+ years
Trisomy 18 (Edwards Syndrome)
- Incidence: 1 in 6,000
- Features: Severe ID, growth restriction, clenched fists, cardiac defects
- Prognosis: Median survival <1 week; 90% die in first year
- Management: Often compassionate care
Trisomy 13 (Patau Syndrome)
- Incidence: 1 in 10,000
- Features: Severe ID, holoprosencephaly, cleft lip/palate, polydactyly
- Prognosis: Median survival <1 week; 90% die in first year
Turner Syndrome (45,X)
- Incidence: 1 in 2,500 females
- Features: Short stature, webbed neck, coarctation of aorta, infertility
- Intelligence: Usually normal
- Management: Growth hormone, estrogen replacement
Klinefelter Syndrome (47,XXY)
- Incidence: 1 in 500-1,000 males
- Features: Tall stature, small testes, gynecomastia, infertility
- Management: Testosterone replacement, fertility counseling
🧭 Genetic Counseling
Risk Assessment and Family Planning
Indications for Counseling
- Family history of genetic disorder
- Consanguinity
- Advanced maternal age (≥35 years)
- Abnormal prenatal screening
- Recurrent pregnancy loss
- Known genetic carrier status
Prenatal Testing Options
- Noninvasive: Ultrasound, maternal serum screening, NIPT
- Invasive: Amniocentesis (15-20 weeks), CVS (10-13 weeks)
- Risk: 0.5-1% miscarriage with invasive procedures
🏥 Management Principles
Comprehensive Care Approach
Delivery Room
Preparation & Stabilization
Team Approach
Multidisciplinary Care
Family Support
Psychosocial Care
Evaluation
Comprehensive Workup
Delivery Room Management
- Preparation: Multidisciplinary team present for known anomalies
- Assessment: Airway, breathing, circulation
- Critical: Don't feed if suspected GI anomaly
- Stabilization: Respiratory support, vascular access, temperature control
Multidisciplinary Care
- Pediatrician/Neonatologist
- Surgeon (general, neurosurgery, orthopedics, urology)
- Geneticist
- Social work
- PT/OT/Speech therapy
- Nutritionist
Family Support
- Immediate: Honest communication, photos, contact with baby
- Ongoing: Support groups, early intervention, respite care
- Mental health: Address grief, anxiety, depression
🔑 High-Yield Summary - Part 2
| Condition | Key Features | Critical Management Points |
|---|---|---|
| Hypospadias | Ventral urethral opening | Do NOT circumcise; surgical repair at 6-18 months |
| Clubfoot | Foot turned inward/downward | Ponseti casting within first week; >90% success |
| Down Syndrome | Facial features, hypotonia, cardiac defects | Cardiac echo, thyroid screening, early intervention |
| Trisomy 18/13 | Multiple anomalies, severe prognosis | Compassionate care; most die in first year |
🎯 Key Takeaways - Part 2
- Hypospadias requires preservation of foreskin for surgical repair—do not circumcise
- Clubfoot treatment with Ponseti method should begin within the first week of life
- DDH screening is essential, especially in females, breech presentations, and positive family history
- Down syndrome requires comprehensive evaluation for cardiac defects (40-50% prevalence)
- Trisomy 18 and 13 have very poor prognosis, with most infants dying within the first year
- Turner syndrome features short stature, webbed neck, and coarctation of aorta
- Multidisciplinary team approach is essential for optimal management of complex anomalies
- Family support and genetic counseling are crucial components of comprehensive care
💡 Clinical Pearls
- "Folic acid prevents neural tube defects." 400-800 mcg daily reduces risk 50-70%
- "Polyhydramnios = think GI obstruction (EA/TEF, duodenal atresia)." Fetus can't swallow amniotic fluid
- "Oligohydramnios = think renal anomaly (bilateral agenesis, PUV)." Reduced urine output
- "VACTERL: look for multiple anomalies." If one component present, screen for others
- "Down syndrome babies need cardiac evaluation." 40-50% have heart defects
- "Bilious vomiting in newborn = surgical emergency." Malrotation with volvulus or atresia
- "Don't circumcise hypospadias!" Need foreskin for surgical repair
- "Clubfoot: start Ponseti casting within first week." >90% success, avoids extensive surgery