A Case of Ileal Malignant Lymphoma Presenting with Intussusception

: A-66-year-old male presented with a chief complaint of intermittent abdominal pain. Colonoscopy and barium enema indicated intussusception of a submucosal tumor of the ileum into the ascending colon. Surgery was thus carried out. The tumor was located 25 cm from the ileocecal junction, measured 4.1 × 3.2×2.3 cm, and showed intraluminal growth. Histopathologic examination of the resected specimen revealed a diffuse mixed cell type malignant lymphoma, and the tumor had invaded the subserosal layer. Intussusception due to malignant lymphoma is relatively rare in adults. We reviewed 43 cases of ileal lymphoma involving intussusception, reported in Japan over the preceding 12 years, and these cases are discussed along with the present case.