A Rare Case of Primary CD56+ T-cell Lymphoma of the Small Intestine

A 72-year-old woman admitted for lower abdominal pain. She had a hard, mobile abdominal mass located from the subumbilical region to the pelvic cavity. Abdominal X-ray findings showed ileus of the small intestine. Computed tomography showed an abdominal mass containing air, necessitating surgery under a diagnosis of severe ileus due to the abdominal mass. We found in surgery that the mass originated from the mesentery of the small intestine near the promontrium, which involved part of the small intestine and sigmoid colon, i. e., 2 sites of the small intestine and part of the sigmoid colon. We excised 2 sites of the small intestine and part of the sigmoid colon with the tumor. The abdominal mass was pathologically diagnosed as CD56+ T-cell lym-phoma of the small intestine. She refused chemotherapy and alimentary examination, and left hospital. But she caused perforated panperitonitis of the duodenum T-cell lymphoma considered to be simultaneity and multiple. She was died after the operation on the 83rd. The T-cell lymphoma of the small intestine are only 30 cases including our case. Especially, CD56+ T-cell Lymphoma has a high rate of perforation, the prognosis is so poor, and it was considered the disease which should be careful of.