Urodynamic studies in boys with disorders of the lower urinary tract. IV. Congenital bladder neck obstruction. A pre-...

Eighteen boys with diagnose of bladder neck obstruction, based on roentgenological criteria, underwent urodynamic investigations. In the majority of patients, urodynamics clearly deviated from the normal range, substantiating that bladder neck obstruction, although rare, really exists in male infants and children. A rather uniform radiographic appearance of the bladder neck was associated with different urodynamic patterns, suggesting that various pathophysiological mechanisms may be involved.