Department of Anorectal Surgery;
the First Affiliated Hospital of Zhengzhou University;
Department of Gas-trointestinal Surgery;
the Affiliated Tumor Hospital of Xinjiang Medical University;
Department of Gastroenterology;
the Third Xiangya Hospital of Central South University;
Department of Gastrointestinal Surgery;
Sun Yat-sen Memorial Hospital of Sun Yat-sen University;
Department of Coronary Artery Disease;
Heart Center;
the First Affiliated Hospital of Xinjiang Medical University;
Department of Oncology;
the Affiliated Hospital of Traditional Chinese Medicine of Xinjiang Medical University;
Colorectal; cancer; Lymph; node; metastasis; T1; stage; Prognosis;