Abstract
Primary malignant lymphoma of the large intestine is comparatively rare. A case of invagintion caused by a primary malignant lymphoma in the cecum is reported here.
A 76-year-old man was admitted to the hospital because of repetitive abdominal pain. The fist-sized movable tumor was palpated in the hypochondrium. Barium enema revealed a cup-shaped or ring-like defect at the end of the barium column. The invagination was reduced by air inflaction and the tumor shadow was shown in the cecum. The cross-section of the tumor invaginated in the distended large intestine was shown by CT scan. Endoscopy revealed the elevated and eroded tumor with uneven surface. Therefore, he was diagnosed as having the invagination due to malignant tumor in the cecum and then a right hemicolectomy (D3) was performed. No peritoneal dissemination and no invasion into the surrounding fatty tissue or other organs was seen in the operation. Pathological diagnosis was malignant lymphoma, diffuse, mixed, B-cell type, se, and n2 (+). After the surgery, chemotherapy (CHOP) was carried out. The patient is alive with no recurrence sign.
