carcinoid tumor gastric neuroendocrine tumor G1 MONDO:0006227 stomach carcinoid tumor grade 1 neuroendocrine neoplasm of stomach gastric ECL-cell carcinoid tumor EFO:1000275 stomach NET G1 gastric ECL cell NET G1 gastric carcinoid tumor stomach neuroendocrine neoplasm G1 gastric ECL cell NET MEDGEN:83885 stomach neuroendocrine tumor, well differentiated, low grade A well differentiated, low grade neuroendocrine tumor (carcinoid tumor) that arises from the stomach. The vast majority of cases arise from the corpus-fundus region. The mitotic count is less than 2 per 10 HPF and/or the Ki67 index is equal to or less than 2 percent. It may be associated with autoimmune chronic atrophic gastritis, multiple endocrine neoplasia type 1, or it may be sporadic. gastric carcinoid tumour UMLS:C0349529 gastric enterochromaffin-like cell neuroendocrine tumor GARD:0024341 gastric enterochromaffin-like cell carcinoid tumour gastric NET G1 gastric enterochromaffin-like cell neuroendocrine tumour gastric enterochromaffin-like cell carcinoid tumor gastric ECL cell, histamine-producing NET gastric ECL-cell carcinoid tumour NCIT:C4635 stomach carcinoid tumour gastric neuroendocrine tumor, well differentiated, low or intermediate grade obsolete_Gastric Neuroendocrine Tumor G1