Group sCRC :ascend colon was 21 (16.9% ) ,transverse colon was 6 (4.8%) ,descend colon was 14 (11.3%) ),sigmoid colon was 21 (16.9%) andrectum is 62 (38.5%) .

• 散发性结直肠癌组 升结肠癌21例(16.；9%25)、横结肠癌6例(4