Antenatal ultrasound diagnosis of perineal ectopic testis--a case report.

Perineal ectopia testis is a rare congenital anomaly with incidence of < 1% of all cases of undescended testes. We report a case of perineal ectopic testis detected by ultrasound at 38 weeks gestational age presenting as an oval echogenic structure located beneath the male fetal genitals. The diagnosis was confirmed postpartum by clinical examination and karyotyping of the neonate. Orchiopexy was performed 1 year after delivery.