title: The APUD cell system and its neoplasms: observations on the significance and limitations of the concept.
mesh_terms: D001078:APUD Cells / Q000502:physiology / Q000648:ultrastructure; D007516:Adenoma, Islet Cell / Q000473:pathology; D000310:Adrenal Gland Neoplasms / Q000473:pathology; D000324:Adrenocorticotropic Hormone / Q000378:metabolism; D002276:Carcinoid Tumor / Q000473:pathology; D018288:Carcinoma, Small Cell / Q000473:pathology; D005770:Gastrointestinal Neoplasms / Q000473:pathology; D006801:Humans; D006965:Hyperplasia; D007124:Immunoenzyme Techniques; D008175:Lung Neoplasms / Q000473:pathology; D008303:Malignant Carcinoid Syndrome / Q000473:pathology; D009369:Neoplasms / Q000473:pathology*; D010182:Pancreatic Diseases / Q000473:pathology; D010190:Pancreatic Neoplasms / Q000473:pathology; D010673:Pheochromocytoma / Q000473:pathology
chemical_list: D000324:Adrenocorticotropic Hormone