The goal of this observational study is to learn about the the pattern of metastasis of the No.253 lymph node in colorectal cancer. The main questions it aims to answer are: 1. What are the risk factors for metastasis to the No.253 lymph node? 2.What is the prognosis for patients with metastasis to the No.253 lymph node? Patients with descending colon cancer, sigmoid colon cancer, and rectal cancer who undergo curative surgery with dissection of the No.253 lymph node are included in this study
Age: 18-75 years;
Underwent laparoscopic left hemicolectomy, sigmoid colectomy, or rectal cancer radical surgery.
Postoperative pathology confirmed as adenocarcinoma.
No evidence of distant metastasis.
Previous history of malignant colorectal tumors.
Patients who have undergone multiple abdominal-pelvic surgeries.
Patients undergoing emergency surgery due to complications such as intestinal obstruction, intestinal perforation, or intestinal bleeding.
Surgery did not achieve R0 resection.
Cancer Institute and Hospital, Chinese Academy of Medical Sciences
Lead sponsor
Peking Union Medical College Hospital
Collaborator
Peking University Cancer Hospital & Institute
Collaborator
China-Japan Friendship Hospital
Collaborator
Chinese PLA General Hospital
Collaborator