Epidermoid cyst of the scrotum extending into the true pelvis.

A 9-year-old boy presented with an asymptomatic scrotal mass that was separate from the testes. The workup included a scrotal ultrasound scan and voiding cystourethrogram. On surgical exploration, the mass was solid, separate from the testes, and extended into the pelvis. The mass was removed, and pathologic examination revealed an epidermoid cyst. This is an uncommon scrotal lesion in boys and may represent a monodermal teratoma or abnormal closure of the median raphe. To our knowledge, this is only the second case report of an epidermoid cyst of the scrotum extending into the true pelvis.