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Between 1973 and 1982, 4448 asymptomatic persons ("human-docking patients") and 1037 outpatients with symptoms were examined to screen colorectal carcinoma using rigid proctosigmoidscope. One hundred and seventy three cases of polyp (3.8%) and 6 cases of carcinoma (0.14%) were found in the "human-docking", while 49 cases of polyp (4.7%) and 56 cases of carcinoma (5.4%) were found in the symptomatic outpatients.<BR>The value of fecal occult blood and the accuracy of clinical symptoms of colorectal cancer in screening were also studied. It is emphasized from our ten years experience that flexible colonofiberscope instead of rigid proctosigmoidscope should be used in screening lower colorectal carcinoma, and the risk of overlooking carcinoma would be considerably high, when only fecal occult blood test was employed in the first step of mass screening for colorectal cancer.
日本大腸肛門病学会の論文