早期结肠癌是指病灶局限于结肠粘膜及粘膜下层者。当结肠癌病变处于早期阶段时，病人往往无临床症状，不会主动就诊，因此早期结肠癌在我国检出率还相当低。日本的消化科医师及内镜医师在早期结肠癌的诊断方面做了大量工作，使早期结肠癌的检出率逐年增多，５年生存率高达... Early colon cancer refers to lesions confined to the colon mucosa and submucosa. When the colon cancer lesions are at an early stage, the patients often have no clinical symptoms and will not take the initiative to seek treatment. Therefore, the detection rate of early colon cancer in China is still very low. Japanese gastroenterologists and endoscope doctors have done a lot of work in the diagnosis of early colon cancer, so that the detection rate of early colon cancer increased year by year, and the 5-year survival rate is as high as ...