we investigated the secretion of chromogranin a by peptide hormone-producing human tumors in studies of patients with the following neoplastic disorders : pheochromocytoma , parathyroid adenoma , primary parathyroid hyperplasia , medullary thyroid carcinoma , thyroidal c-cell hyperplasia , carcinoid tumor , oat-cell lung carcinoma , pancreatic islet-cell tumor , and aortic-body tumor .
C0262587
parathyroid adenoma
C0030518
parathyroid