A Case of Mucosa Associated Lymphoid Tissue Lymphoma in the Sigmoid Colon

Hitoshi Takeuchi, Eiji Konaga, Genso Kobayashi, Masaaki Kashitani, Yoshimasa Yasui, Youkio Kimura, Masao Harano

Department of Surgery, Iwakuni National Hospital

Malignant lymphoma rarely occurs in the colon, especially in the sigmoid colon. The concept of mucosa associated lymphoid tissue (MALT) lymphoma is not widely accepted among pathologists. We report here the first case of MALT lymphoma in the sigmoid colon. The patient was a 54-year-old man who complained of fever. He was treated under the diagnosis of prostitis and Crohn's disease. However, his clinical condition did not improve. Barium enema study showed two skip lesions with irregular surface in the sigmoid colon. These changed from concave to elevated in the endoscopic findings. Thus, the patient, suspected of having malignant lymphoma rather than Crohn's disease, underwent sigmoidectomy. The surgical specimen was diagnosed as MALT lymphoma. We should observe clinical changes carefully to differentiate malignant lymphoma from inflammatory bowel diseases.

Key words
mucosa associated lymphoid tissue lymphoma, malignant lymphoma of the sigmoid colon, Crohn's disease

Reprint requests
Hitoshi Takeuchi Department of Surgery, Iwakuni National Hospital JAPAN

Accepted
April 14, 1993

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