Hidden obstruction: A rare case of hematometrocolpos in a young adolescent with vaginal atresia.

Hematometrocolpos is a condition characterized by the accumulation of menstrual blood in the uterus and vagina due to an obstruction, often caused by congenital malformations such as vaginal atresia or imperforate hymen. A 12-year-old girl presented with acute pelvic pain and absence of menarche. Ultrasound ruled out ovarian pathology but revealed distension of the cervix and vagina.