The goal of this observational study is to learn about the spatial distribution and significance of metastatic lymph nodes in colorectal cancer patients. The main question it aims to answer is:
* What is the spatial distribution pattern of metastatic lymph nodes in patients with colorectal cancer? * Can the spatial distribution pattern of metastatic lymph nodes in patients with colorectal cancer guide clinical practice? Participants should undergo regular follow-up examinations for at least 5 years after the surgery.
Aged between 18 and 80 years
Pathologically confirmed adenocarcinoma of the colon or rectum
Underwent radical resection for colorectal cancer with a D3 lymphadenectomy and lymph nodes were submitted for pathological examination according to standardized station-based and distance-based protocol
No distant metastasis or distant metastasis within 6 months after surgery
Pathologically confirmed benign tumors or non-adenocarcinoma malignancies
Underwent local excision or palliative resection
Regional lymph nodes were not dissected or submitted for pathological examination according to the unified station-based or distance-based protocol
With distant metastasis or distant metastasis within 6 months after surgery
Cancer Institute and Hospital, Chinese Academy of Medical Sciences
Lead sponsor
China-Japan Friendship Hospital
Collaborator
Shanxi Province Cancer Hospital
Collaborator
Zhengzhou University
Collaborator