Hematometrocolpos
Hematometrocolpos is a rare condition which occurs when the uterus fills with menstrual blood. Symptoms are typically a lack of a menstrual period, recurrent pelvic pain, and a pelvic mass.
It is usually caused by a nonperforated hymen but may also be the result of either a transverse vaginal septum or a “uterus didelphys,” (double uterus), both rare congenital anomalies.
All such causes can be surgically corrected.