原发于大肠的恶性淋巴瘤（下称恶淋）较少见，仅占所有原发于胃肠道恶淋的１０％左右。我们５年来对本病的内镜下特点及组织学形态特点进行了初步研究，对本病的早期认识和诊治有进一步提高，现就本组资料报告如下。自１９９０年至１９９４年大肠镜检查共８７８４例，诊断为恶 Malignant lymphoma (hereinafter referred to as malignancy) originating in the large intestine is rare, accounting for only about 10% of all cases of primary malignancies in the gastrointestinal tract. We have conducted preliminary studies on the endoscopic characteristics and histological features of the disease over the past five years. We have further improved our early understanding of the disease and its diagnosis and treatment. We report on this group’s data as follows. A total of 8784 cases of colonoscopy from 1990 to 1994 were diagnosed as EVIL