Overview
A randomized controlled clinical trial to compare the short and long outcomes of low anterior resection for middle-low rectal cancer with or without pelvic peritonization.
Eligibility
Inclusion Criteria:
- Matching the diagnostic criteria of rectal adenocarcinoma
- Laparoscopic or robotic radical surgery for rectal cancer
- Preoperative TNM staging T1-3N0-2M0
- No history of malignant tumors by preoperative examination
- Middle and low rectal cancer
- Tumor size of 4 cm or less
- ASA 1-3 scores
- Written informed consent by the patient
- The patient is willing to randomize to any group
Exclusion Criteria:
- Previous abdominal surgery
- Past malignant tumor history
- Preoperative examination suggests distant metastasis
- Be participating or have participated in other clinical studies related to rectal cancer surgery within 6 months
- Emergency operation
Elimination criteria
- The tumor is confirmed to be T4b during the operation or other tumors are found to be combined with other tumors during the operation
- The anastomosis is located above the peritoneum reflex
- Intraoperative conversion to laparotomy
- Change the surgical method to perform Miles or Hartmann surgery
- Postoperative pathologically confirmed non-adenocarcinoma
- The patient asked to withdraw