Neonatal hydrometrocolpos.

A neonate with persistence of the urogenital sinus, double vaginae and hydrometrocolpos, in association with an anterior perineal anus, ambiguous genitalia and a ventricular septal defect, is described. Abdominal ultrasound led to an early diagnosis which prevented morbidity and mortality from renal failure and unnecessary laparotomy. Drainage was achieved by a perineal procedure.