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1975～1995年采用纤维结肠镜对284例老年患者进行检查，所有病例均经病理诊断结果显示，I级和Ⅱ～Ⅲ级不典型增生腺瘤、大肠中、晚期癌和早癌的检出率分别为9．5％、8.4％、18.0％、2.5％。血便患者的大肠中、晚期癌、Ⅱ～Ⅲ级腺瘤检出率高于粘液使者（P＜0.01），血便患者的腺瘤不典型增生以Ⅱ～Ⅲ级为主，粘液便患者则以I级为主．≥70岁患者，Ⅱ～Ⅲ级不典型增生腺瘤较60～69岁患者为高（P＜0．01）。男性患者I级不典型增生腺瘤检出率高于女性患者（P＜0.01）。本组纤维结肠镜检查无严重并发症，对老年大肠腺瘤及大肠癌有较高的诊断价值，并提示老年大肠癌的发生与大肠腺瘤不典型增生发展有关。
From 1975 to 1995, 284 elderly patients were examined with colonoscopy. All cases were diagnosed by pathological findings. The detection rates of grade I and II-III atypical hyperplasia adenomas, middle and late colon and early cancers were examined. They were 9.5%, 8.4%, 18.0%, and 2.5%, respectively. The detection rate of middle and late stage large intestine cancer, grade II-III adenomas in blood stool patients was higher than that of mucin messengers (P<0.01). The dysplasia of adenomas in blood stool patients was mainly grade II-III, and that of mucous stool was I. Grade-based. In patients older than 70 years old, grade II-III atypical hyperplasia adenomas were higher than those 60-69 years old (P<0.01). The detection rate of type I atypical hyperplasia adenoma in male patients was higher than that in female patients (P<0.01). The group of colonoscopy without serious complications, for the elderly colorectal adenoma and colorectal cancer have a higher diagnostic value, and suggest that the occurrence of colorectal cancer and adenoma of atypical hyperplasia development.