title: Hypocalcemia associated with a calcitonin-producing hepatocellular carcinoma.
abstract: We report a case of symptomatic hypocalcemia with a calcitonin-producing tumor. This case is unusual for two reasons. First, the primary tumor was a hepatocellular carcinoma that was producing large amounts of calcitonin. To our knowledge, well-defined cases of calcitonin-secreting hepatoma have not been previously reported. Second, the patient's hypercalcemia was shown to be secondary to hypomagnesemic inhibition of parathyroid function and not related to hypercalcitonemia.
mesh_terms: D000368:Aged; D002116:Calcitonin / Q000378:metabolism*; D006528:Carcinoma, Hepatocellular / Q000150:complications* / Q000378:metabolism; D006801:Humans; D006996:Hypocalcemia / Q000150:complications* / Q000209:etiology; D008113:Liver Neoplasms / Q000150:complications* / Q000378:metabolism; D008274:Magnesium / Q000502:physiology; D008297:Male; D009376:Neoplasms, Hormone-Dependent / Q000378:metabolism
chemical_list: D002116:Calcitonin; D008274:Magnesium