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.
Patients with left-sided colorectal cancer (left colon cancer, sigmoid cancer, rectal cancer) underwent laparoscopic surgery with dissection of No.253 lymph node.
Cohort
Retrospective
Laparoscopic colorectal surgery
Procedure/SurgeryPatients underwent laparoscopic left colectomy, sigmoid resection or rectal surgery according to the location of tumor.
Metastatic rate of No.253 lymph node
Pathologically confirmed tumor cell infiltration in the No.253 lymph node
Number of harvested lymph nodes
Total number of lymph nodes dissected in the pathology report
Incidence of postoperative complications
The proportion of short-term complications occurring within 30 days post-surgery
5-year local recurrence rate
Local recurrence refers to the return of cancer in the same area where it originally developed, typically after treatment has been completed.
5-year disease free survival rate
Disease free survival refers to the length of time after primary treatment during which a patient survives without any signs or symptoms of the cancer.
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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
