A Case of Multiple Rectal Neuroendocrine Tumors with Metastases in the Inferior Mesenteric Lymph Nodes

Abstract

A 69-year-old man who had been diagnosed with sigmoid colon cancer underwent laparoscopic sigmoid colectomy, and the resected specimen demonstrated lymph node metastasis of a neuroendocrine tumor (NET). Afterwards, total colonoscopy was performed, and a NET was shown in the rectum. Laparoscopic super-low anterior resection was performed, and 23 NETs were seen in the specimen on histopathology. All tumors were less than 8 mm in diameter, but 11 of 15 harvested lymph nodes were found to be metastatic. The patient is doing well 3 years after surgery with no evidence of tumor recurrence or distant metastasis.