Sun considers colorectal adenomas, the precancerous lesions in the incidence of colorectal cancer, as the most important stage that we can do something to prevent the occurrence of colorectal cancer.

• 孙师认为大肠腺瘤这一癌前病变在大肠癌的发生、发展中尤为重要，应未病先防，才能有效预防大肠癌的发生。