title: Parathyroid hormone is normal in renal stone patients with idiopathic hypercalciuria and high fasting urinary calcium.
abstract: In a group of patients with idiopathic hypercalciuria and an increased fasting urinary calcium excretion we re-examined the question: does secondary hyperparathy-roididsm exist? Eight out of 51 patients with calcium renal stones had a high calcium excretion in both fasting and in 24 h urines. The carboxyl-terminal immunoreactive PTH (iPTH) values in these patients were 16 +/- 5 ngeq/ml (M +/- SD), no higher than the iPTH values in the other groups, e.g. normocalciuric patients had an iPTH of 23 +/- 8 ngeq/ml. The existence of secondary hyperparathyroidism in a subgroup of stone patients with increased fasting urinary calcium excretion is questionable.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002118:Calcium / Q000652:urine*; D005260:Female; D006801:Humans; D006962:Hyperparathyroidism, Secondary / Q000150:complications; D008297:Male; D008875:Middle Aged; D010281:Parathyroid Hormone / Q000097:blood*; D014545:Urinary Calculi / Q000097:blood* / Q000209:etiology / Q000652:urine
chemical_list: D010281:Parathyroid Hormone; D002118:Calcium