Laparoscopic repair of a rectal fistula due to a benign ovarian dermoid cyst.

Ovarian dermoid cysts are one of the most common benign neoplasms in women. Rectal fistula formation due to an ovarian dermoid cyst, particularly a benign dermoid cyst, is extremely rare. A 17-year-old girl with symptoms of lower abdominal pain, passage of sebaceous materials in the stool, and hematochezia was found to have an 11-cm dermoid cyst complicated with a rectal fistula formation. Laparoscopic repair of the rectal fistula was performed successfully with bilateral ovarian cystectomies. This case presents the rare formation of a fistula between a benign dermoid cyst and the rectum and its treatment using laparoscopic repair without laparotomy.