Laparoscopic excision of a rudimentary uterine horn in a child.

Unicornuate uterus with a rudimentary horn is the rarest congenital anomaly of the female genital system. It can result in a variety of gynecologic and obstetric complications. This case report is an acute presentation of a cavitated, noncommunicating, rudimentary horn in a premenarcheal girl. Successful laparoscopic excision was performed. The full extent of the anomaly was diagnosed by a combination of operative findings and postoperative magnetic resonance imaging.