has characteristic has characteristic disease has location small intestine neuroendocrine tumor, well differentiated, low or intermediate grade duodenal neuroendocrine tumor, well differentiated, low or intermediate grade https://www.malacards.org/card/duodenal_neuroendocrine_tumor duodenal neuroendocrine tumor MONDO:0015063 NCIT:C135080 A well differentiated, low or intermediate grade tumor with neuroendocrine differentiation that arises from the duodenum. MEDGEN:1619951 UMLS:C4525619 GARD:0019751 duodenal neuroendocrine tumour Orphanet:100076 neuroendocrine neoplasm tumor grade 1 or 2, general grading system duodenal neuroendocrine neoplasm duodenum