Down's syndrome, precocious puberty, and transverse vaginal septum: An unusual cause of abdominal pain

Hematocolpos should be considered in adolescent girls who present with lower abdominal pain, a pelvic mass, and primary amenorrhea. The authors describe a rare case of a young child with Down's syndrome, precocious puberty, and hematocolpos caused by a transverse vaginal septum. The diagnosis was facilitated using a combination of computed tomography and ultrasound scanning.