The purpose of this study is to investigate the metastatic status of lateral pelvic lymph nodes in rectal neuroendocrine neoplasms (rNENs) undergoing laparoscopic total mesenteric excision (TME). The hypothesis is that the rate of lateral lymph node metastasis is underestimated in rNENs undergoing TME, necessitating concurrent lateral Pelvic lymph node dissection.
Biopsy proven rectal neuroendocrine neoplasm (neuroendocrine tumor and carcinoma);
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.
Complete intestinal obstruction;
Hepatitis activity and peripheral neuropathy (such as peripheral neuritis, pseudo meningitis, motor neuritis, and sensory impairment);
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；
Pregnancy or breastfeeding;