Abstract
A case of primary malignant lymphoma of the cecum which formed a large mass occupying the pelvic cavity is reported. A 17-year-old man complaining of fainting was sent to our department with a diagnosis of anemia and pelvic tumor of unknown origin. Abdominal echogram and computed tomography showed a large mass involving the intestine in the pelvic cavity. Barium enema study demonstrated stenosis of the ascending colon. Colonscopy showed a tumor with granular surface in the ascending colon, and the biopsy specimen revealed malignant lymphoma, diffuse medium cell type. Angiogram showed that the tumor was fed by the ileocolic artery. He underwent right hemicolectomy and lymph node dissection. Macroscopic examination of the resected specimen showed that the tumor originated in the cecum, and histological study revealed malignant lymphoma, diffuse medium B cell type. He underwent chemotherapy and is being followed up as an outpatient.
