title: Intranuclear fibrillar bundles in functioning beta-cell adenoma of pancreas.
mesh_terms: D007516:Adenoma, Islet Cell / Q000473:pathology*; D002467:Cell Nucleus; D002648:Child; D006651:Histocytochemistry; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D010190:Pancreatic Neoplasms / Q000473:pathology*