Abstract
We experienced a case of endometriosis of the rectum forming an ovarial cyst with endometriosis and fistula. A 34-year-old woman was admitted to the hospital because of anal bleeding and lower abominal pain. Colonoscopic examination revealed a submucosal tumorous lesion in the rectum. Barium enema showed a leakage and retention of contrast medium from the rectum. CT and magnetic resonance imaging visualized a cystic tumor of the rectum. A diagnosis of fistula formation of endometrial ovarian cyst to the rectum was made. Because of persisting anal bleeding, excision of the rectum including the cyst, fistula and adnexa uteri was carried out. The excised specimen revealed an infiltration of the endometrial gland into the muscular layer of the rectum. There has been no sign of recurrence, as of about 4 years after the operation. It is though that agressive surgical treatment is necessary for fistula-forming endometriosis of the intestine.
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