[A Case of Malignant Lymphoma of the Small Intestine with Intussusception Resected Under Laparoscopic Assistance].

We report our experience with a case of malignant lymphoma of the small intestine associated with intussusception. The patient was a 57-year-old woman. She came to our hospital, complaining of lower abdominal pain from the previous day. An abdominopelvic CT scan showed findings of ileocolic intussusception, in which the ileum was inserted into the ascending colon. Colonoscopy revealed a 2-3 cm diameter lesion in the cecum next to the ileocecal valve, and biopsy of the lesion showed a diagnosis of suspected malignant lymphoma, although a definitive diagnosis was not reached. After admission, the patient's symptoms improved with nothing by mouth and fluid replacement, but ileocolic intussusception remained on abdominal pelvic CT scan, and the patient was referred for surgery for intussusception caused by a suspected malignant lymphoma lesion at the distal end of the ileum. Laparoscopic ileocolic resection with lymph node dissection was performed as an elective surgery on the 8th day after admission. The intussusception was not completely resolved, and a 3 cm diameter elastic hard protuberant lesion was found in the ileum 5 cm from the ileocecal valve. Histopathological examination revealed a diagnosis of diffuse large B-cell lymphoma. The patient was treated with R-CHOP as adjuvant therapy and is alive without recurrence.