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[Primary hyperparathyroidism in patients with bilateral nephrolithiasis].

Experience in the diagnosis and treatment of the renal form of primary hyperparathyroidism in 57 patients with bilateral nephrolithiasis was summed up. The main diagnostic criterion was the detection of biochemical changes in the blood and urine (hypercalcemia, hypophosphatemia, hypercalciuria) and the use of some tests (Howard's test and parathyroidin test). Parathyroidectomy was performed after establishing diagnosis. A new stage in therapy of such patients was a study of renal function and phosphocalcium metabolism after parathyroidectomy. The improvement of some indices (an increase in glomerular filtration, urea excretion with urine and relative urine density, and a decrease in hypercalciuria and hyperphosphaturia) indicated the effectiveness of surgical intervention for primary hyperparathyroidism in patients with bilateral nephrolithiasis. It was also confirmed by a decrease in lithogenic relapse after parathyroidectomy.