[Diagnosis of absorptive hypercalciuria]

Reference is made to the significance of hypercalciuria in the aetiology of calcium oxalate lithiasis. Differentiation between the various forms of hypercalciuria allows the therapy to be suited to the respective causes. In order to measure intestinal calcium absorption the authors examined serum samples from 22 patients after oral administration of Ca47; in 13 cases absorptive calciuria was diagnosed.