title: Observations on the ultrastructure of a netastasizing beta cell islet tumor.
mesh_terms: D007516:Adenoma, Islet Cell / Q000473:pathology*; D000328:Adult; D003594:Cytoplasmic Granules; D005260:Female; D006801:Humans; D008928:Mitochondria; D009362:Neoplasm Metastasis / Q000473:pathology; D010190:Pancreatic Neoplasms / Q000473:pathology*