Lateral Pelvic Lymph Node Dissection for Rectal Neuroendocrine Neoplasms Undergoing Laparoscopic Total Mesenteric Excision

Prior treatment

• Significant organ dysfunction or other significant diseases, including clinically relevant coronary artery disease, cardiovascular disease, or myocardial infarction within the 12 months before enrollment; severe neurological or psychiatric history; severe infection; active disseminated intravascular coagulation；
• Alcohol abuse or drug addiction;
• Concurrent uncontrolled medical condition;

Other illness

• Hepatitis activity and peripheral neuropathy (such as peripheral neuritis, pseudo meningitis, motor neuritis, and sensory impairment);

Other

• Complete intestinal obstruction;
• Pregnancy or breastfeeding;

• Biopsy proven rectal neuroendocrine neoplasm (neuroendocrine tumor and carcinoma);
• Meets any one of the following conditions:
  • Preoperative imaging examinations reveal that the maximum diameter of the tumor is greater than 2cm.
  • Preoperative imaging examinations reveal that the maximum diameter of the tumor is between 1-2cm and the clinical staging is T2 or higher.
  • Preoperative imaging examinations reveal that the maximum diameter of the tumor is between 1-2cm and is categorized as Grade 3 differentiation.
  • Recurrence after local excision under endoscopy.
• Eastern Cooperative Oncology Group(ECOG) performance score ≤ 1;
• Written informed consent;