Primary amenorrhea secondary to imperforate hymen

Hymen imperforation is uncommon. Symptoms include primary amenorrhea, cyclical lower abdominal pain, and rarely a pelvic mass syndrome. Delayed discovery may lead to endometriosis and infertility. Pelvic ultrasound and nuclear magnetic resonance detect associated genito‐urinary malformations. Hymenectomy is the standard surgical treatment. Hymen imperforation is uncommon. Symptoms include primary amenorrhea, a bulging perineal mass, cyclical abdominal pain, and urinary retention or infections. Clinical awareness allows an opportune diagnosis, thus preventing complications.