Abstract
We report a case of endometriosis in a right external inguinal hernia. A 36-year-old woman was seen at our hospital because of a painful right inguinal mass during menstruation. She had noticed a gradually enlarging bulge and a local tenderness in the right groin. On admission, her physical examination was normal except for a right inguinal mass, 2.0 by 1.5cm in size, which was mobile but was not reducible into the abdominal cavity. Ultrasonography revealed the right inguinal tumor to be a low echoic lesion. Exploration of the mass through a right inguinal incision revealed an indirect inguinal hernia. The hernia sac was found to contain a round, irregular mass that had adhered to the wall of the sac. The mass was easily excised from its surroundings, and the sac was removed after a high ligation, following the usual procedure. Histologic examination of the mass revealed endometrial tissue and stroma surrounded with fibrous tissues. Her postoperative course was uneventful. No signs of recurrence have been seen in the past ten months.
