Abstract
A 71-year-old woman complained of lower abdominal pain. Abdominal CT demonstrated a tumor in the pelvis, and the histological diagnosis by needle biopsy was diffuse large B cell lymphoma. The patient underwent R-CHOP chemotherapy. After 6 courses of chemotherapy, the tumor of ileum and mesenteric lymphadenopathy disappeared; however, the patient developed repeated small bowel obstruction. Thus, a partial resection of ileum and lymph node biopsy was performed. Macroscopic findings of the resected ileum showed severe stenosis with ulcer. Microscopically, viable lymphoma cells were not found in the resected intestine and lymph nodes. This case suggests that malignant lymphoma of the gastrointestinal tract with a complete response to chemotherapy sometimes requires surgical resection due to an obstruction.
