Abstract
Herlyn-Werner-Wunderlich (HWW) syndrome is a rare and complex congenital anomaly of the genitourinary system characterized by uterus didelphys, an obstructed hemivagina, and ipsilateral renal agenesis. It is the result of the maldevelopment of both the Mullerian and Wolffian ducts. Clinical manifestations of dysmenorrhea, dysuria, and urinary retention appear after menarche due to the accumulation of menstrual blood and distention of the obstructed hemivagina. Diagnosis of this anomaly is often delayed, and the obstructive nature of the condition is missed due to cyclic menstruation from the one canalized hemivagina. This case report represents a typical form of HWW syndrome to highlight the importance of considering this rare entity in an adolescent girl presenting with signs of dysmenorrhea and urinary complaints. A 13-year-old patient was presented at the obstetrics and gynecology clinic due to low abdominal pain and urinary retention on the fifth day of menstruation. For the last 6 months, the patient suffered progressive cyclic low abdominal pain associated with menstruation. Inspection of the external genitalia was unremarkable, and the hymenal membrane had a normal oval opening. An ultrasound examination revealed the sonographic features of the didelphys uterus and was suggestive of a right obstructed hemivagina with hematocolpos. Magnetic resonance imaging and computed tomography urography showed evidence of didelphys uterus, right blind obstructed hemivagina associated with huge hematocolpos, and ipsilateral renal agenesis. The diagnosis of HWW syndrome was established. Surgical resection of the vaginal septum was undertaken without delay, and the patient was discharged the following days.