A well differentiated, low grade neuroendocrine tumor (carcinoid tumor) that arises from the small or large intestine. The mitotic count is less than 2 per 10 HPF and/or the Ki67 index is equal to or less than 2 percent. The disease is MONDO_0021533 (intestinal neuroendocrine tumor G1). Also known as: carcinoid tumor of intestine, carcinoid tumor of the intestine, carcinoid tumour of intestine, carcinoid tumour of the intestine, grade 1 neuroendocrine neoplasm of intestine, intestinal NET G1, intestinal carcinoid tumor, intestinal carcinoid tumour.