目的　探讨结肠镜检查对大肠癌的诊断价值。方法　对 5 8例大肠癌患者的临床症状、内镜检查及病理资料进行回顾性分析。结果　本组大肠癌患者 6 0岁以上多见 (占 70 .7% ) ,临床症状以血便为主 (发生率 5 6 .9% )。肿瘤部位多在直肠和乙状结肠。病理类型 :腺癌 2 0例 ,管状腺癌 14例 ,乳头状腺癌 8例 ,管状乳头状腺癌 10例 ,息肉恶变 6例。结论　对可疑病人进行结肠镜检查可大大提高早期诊断率 ,不能忽视青年大肠癌的发生 ,镜检中发现息肉并及时摘除 ,可减少癌变机会 Objective To investigate the diagnostic value of colonoscopy in colorectal cancer. Methods The clinical symptoms, endoscopy and pathological data of 58 patients with colorectal cancer were retrospectively analyzed. Results The patients with colorectal cancer more than 60 years old (accounting for 70.7%), the main clinical symptoms of bloody stool (the incidence of 5.69%). More tumor parts in the rectum and sigmoid colon. Pathological types: 20 cases of adenocarcinoma, tubular adenocarcinoma in 14 cases, papillary adenocarcinoma in 8 cases, tubular papillary adenocarcinoma in 10 cases, polyposis malignant transformation in 6 cases. Conclusions Colonoscopy of suspicious patients can greatly improve the early diagnosis rate, can not ignore the occurrence of colorectal cancer, microscopic examination of polyps found in time and removed, can reduce the chance of cancer