The mutation rate of epithelial cell shed from intestine in stool was 37.75%(15/13). The positive rate of adenomas and CRC were 25%(2/8)and 40%(14/35)respectively.

• 患者粪便脱落细胞APC基因的突变率为37.；75%25(16/43)；腺瘤和大肠癌APC基因突变分别为25%25(2/8)和40%25(14/35)。