title: Ultrastructural features of functioning alpha- and beta-cell tumors.
mesh_terms: D000236:Adenoma / Q000473:pathology*; D007516:Adenoma, Islet Cell / Q000473:pathology; D000328:Adult; D000368:Aged; D002277:Carcinoma / Q000473:pathology*; D003594:Cytoplasmic Granules; D005260:Female; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007003:Hypoglycemia / Q000473:pathology; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000473:pathology*; D015043:Zollinger-Ellison Syndrome / Q000473:pathology*