[Hypercalciuric and hyperparathyroid renal lithiasis]

Idiopathic hypercalciuria was noted in 10% of a series of 1635 subjects with renal lithiasis. Eight-day administration of thiazide diuretics as a test for the discovery of latent hyperparathyroidism in idiopathic hypercalciuria is described. In 6 cases diagnosed in this way, surgery disclosed the presence of a parathyroid adenoma. Resection was followed by persistent hypercalciuria and, in some instances, renal lithiasis activity. The pathogenesis of associations of these frequently observed diseases is examined.