我院开展肠镜检查以来，发现 2例大肠非特异性单纯性巨大溃疡。由于溃疡异常巨大和溃疡部位位于非好发部，加之内镜下活检未发现组织学特征性改变及本病发病率低等原因，而导致镜检诊断和临床诊断均误诊为溃疡型大肠癌，现报告如下。　　例 1患者男， 42岁。因右侧腹部隐痛伴解 In our hospital since the colonoscopy, found 2 cases of large intestine non-specific simple huge ulcer. Due to the huge ulcer and ulcer in the non-fat part, combined with endoscopic biopsy found no histological changes and the low incidence of this disease, which led to microscopic diagnosis and clinical diagnosis were misdiagnosed as ulcerative colorectal cancer, The report is as follows. Example 1 patient male, 42 years old. Due to the right abdomen pain and complacency