A neoplasm with neuroendocrine differentiation that arises from the small or large intestine. It includes well differentiated neuroendocrine tumors (low and intermediate grade) and poorly differentiated neuroendocrine carcinomas (high grade). The disease is MONDO_0002883 (intestinal neuroendocrine neoplasm). Also known as: intestine NET, intestine neuroendocrine neoplasm, intestine neuroendocrine tumor, intestine neuroendocrine tumor, well differentiated, low or intermediate grade, intestine neuroendocrine tumour, neuroendocrine neoplasm of intestine, neuroendocrine neoplasm of the intestine, neuroendocrine tumor of intestine.