Primary small rectal neuroendocrine tumor with pelvic lateral lymph nodes metastasis: A case report and review of literature

This report presents a 47-year-old man with a small tumor(about 6mm×8mm in size) in the rectum during an enteroscopy for physical examination, who finally be diagnosed as neuroendocrine tumors (NETs) with the pelvic lateral lymph nodes metastasis and total mesorectal excision (TME) and lateral lymph node dissection were performed on the patient.Abstract: Neuroendocrine tumors (NETs) can occur in almost any organ of the body, and they vary in size and volume.The small tumors may be less than 1cm in size, but the large ones can exceed 20 cm.The probability of developing NETs in different organs varies greatly, but rectal NETs are relatively common.In this report, we present the case of a 47-year-old man who was asymptomatic and incidentally diagnosed with a small NET in the rectum during an enteroscopy for physical examination.The diagnosis was confirmed by pathological examination of the biopsy.Then, the local resection and a wide free margin