title: Ultrastructure of functioning beta cell tumors of the pancreatic islets.
mesh_terms: D007516:Adenoma, Islet Cell / Q000473:pathology*; D000328:Adult; D000368:Aged; D002454:Cell Differentiation; D002462:Cell Membrane; D003594:Cytoplasmic Granules; D005260:Female; D006729:Hormones, Ectopic / Q000378:metabolism; D006801:Humans; D007003:Hypoglycemia / Q000473:pathology; D007328:Insulin / Q000378:metabolism; D000078790:Insulin Secretion; D007365:Intercellular Junctions; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009940:Organoids; D010190:Pancreatic Neoplasms / Q000473:pathology*
chemical_list: D006729:Hormones, Ectopic; D007328:Insulin