Reproductive · Pediatric Urology
The facts most likely to be tested
Hypospadias results from the failure of the urethral folds to fuse along the ventral aspect of the penis.
The urethral meatus is located abnormally on the ventral surface of the penis, proximal to the tip of the glans.
Physical examination often reveals a dorsal hooded foreskin due to the incomplete development of the ventral prepuce.
Patients with hypospadias frequently present with chordee, a ventral curvature of the penis caused by fibrous tissue.
Circumcision is strictly contraindicated in newborns with hypospadias because the foreskin is required for future urethroplasty reconstruction.
Severe cases of hypospadias, particularly those associated with cryptorchidism, require a karyotype and endocrine evaluation to rule out Disorders of Sex Development (DSD).
Surgical correction is typically performed between 6 and 18 months of age to optimize functional and cosmetic outcomes.
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A 2-week-old male infant is brought to the clinic for a routine well-child check. On physical examination, the urethral meatus is noted to be located on the ventral shaft of the penis. The physician observes a dorsal hooded foreskin and a mild ventral curvature of the penile shaft upon erection. Both testes are descended and palpable in the scrotum. The infant is otherwise healthy and thriving.
What is the most appropriate management for this patient's foreskin?
Defer circumcision
This patient presents with classic signs of hypospadias; the foreskin must be preserved for use as a graft during future surgical reconstruction (urethroplasty).
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Etiology / Epidemiology
Congenital anomaly resulting from incomplete fusion of urethral folds. Increased risk with advanced maternal age and in utero endocrine disruptors.
Clinical Manifestations
Ventral displacement of the urethral meatus. Classic chordee (ventral penile curvature) and dorsal hooded foreskin.
Diagnosis
Primarily a clinical diagnosis based on physical exam. Karyotype analysis is indicated if associated with cryptorchidism.
Treatment
Surgical urethroplasty is the definitive treatment. Do not perform neonatal circumcision as foreskin is needed for reconstruction.
Prognosis
Excellent outcomes with early repair. 6-18 months is the optimal age for surgical correction.
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Epidemiology & Etiology
Hypospadias is one of the most common congenital anomalies, occurring in approximately 1 in 250 live male births. Etiology is multifactorial, involving genetic predisposition and environmental factors that disrupt androgen signaling during the first trimester. Maternal exposure to diethylstilbestrol or pesticides is a known risk factor.
Pertinent Anatomy
The urethral meatus is located on the ventral surface of the penis, proximal to the tip of the glans. The condition is classified by location: distal (glanular/subcoronal), midshaft, or proximal (penoscrotal/perineal). The dorsal hood represents the incomplete closure of the prepuce.
Pathophysiology
Normal penile development requires the fusion of the urethral folds along the ventral aspect of the urogenital sinus. Failure of this fusion, often due to androgen receptor insensitivity or insufficient testosterone production, results in the meatus opening prematurely. This developmental arrest frequently causes chordee, a fibrous band causing ventral curvature, which may impede future sexual function.
Clinical Manifestations
Physical exam reveals the meatus located anywhere from the glans to the perineum. The dorsal hooded foreskin is a pathognomonic finding, as the ventral foreskin is absent. Red flag: If hypospadias is accompanied by cryptorchidism, consider a disorder of sexual development (DSD) and perform a karyotype.
Diagnosis
Diagnosis is established via physical examination at birth. No imaging is required for isolated cases. If the meatus is proximal or associated with undescended testes, a pelvic ultrasound or genitourinary workup is necessary to rule out internal anomalies.
Treatment
Surgical urethroplasty is the standard of care, typically performed between 6 and 18 months of age. Contraindication: Never perform routine newborn circumcision, as the foreskin is essential for the reconstructive graft. Post-operative care focuses on preventing urethrocutaneous fistula formation.
Prognosis
Most patients achieve normal voiding and sexual function post-repair. Urethrocutaneous fistula is the most common complication, occurring in 5-10% of cases. Long-term follow-up is required to monitor for meatal stenosis.
Differential Diagnosis
Epispadias: meatus on the dorsal surface of the penis
Chordee without hypospadias: ventral curvature without meatal displacement
Ambiguous genitalia: requires urgent endocrine and genetic evaluation
Micropenis: normal meatal position but small phallic size
Phimosis: inability to retract foreskin, often confused with hooded prepuce