digestive system neuroendocrine tumor, grade 1/2 gastric neuroendocrine neoplasm gastric neuroendocrine tumor, well differentiated, low or intermediate grade ONCOTREE:SWDNET gastric well differentiated endocrine tumor/carcinoma gastric neuroendocrine tumour UMLS:C3272399 GNET MEDGEN:474032 gastric NET gastric well differentiated endocrine tumor NCIT:C95871 gastric well differentiated endocrine tumour GARD:0025056 gastric NET G1/2 MONDO:0015062 A well differentiated, low or intermediate grade tumor with neuroendocrine differentiation that arises from the stomach. gastric neuroendocrine tumor well-differentiated neuroendocrine tumours of the stomach well-differentiated neuroendocrine tumors of the stomach