Department of Gastroenterology People’s Hospital of Xinjiang Uygur Autonomous Region Urumqi 830001 Xinjiang Uygur Autonomous Region China;
Department of Dermatology People’s Hospital of Xinjiang Uygur Autonomous Region Urumqi 830001 Xinjiang Uygur Autonomous Region China;
Sentinel polyps; Rectal polyps; Proximal colon cancer; Ascending colon cancer; Transverse colon cancer;