Inclusion Criteria:  Patients aged ≥18 and ≤75 years old. Patients with complete data on demography and clinicopathology.  Exclusion Criteria:  Patients with a history of inflammatory bowel disease, enterophthisis, familial adenomatous polyposis, P-J syndrome and intestinal lymphoma.  Patients with a previous history of colorectal neoplasm. Patients with a history of severe systemic diseases. Lack of complete clinical data for analysis.