Calcium Oxalate Urinary-Tract Stones in Patients on Maintenance Dialysis

Abstract
To the Editor: The low concentration of urinary crystalloids, and especially of calcium, makes it highly unlikely that patients with terminal renal failure will form kidney stones. Two patients passed multiple kidney stones while undergoing maintenance dialysis.Case 1. A 34-year-old man had end-stage proliferative glomerulonephritis. There was no past history of kidney stones. Since October, 1972, he has been undergoing chronic peritoneal dialysis. In July, 1973, he had right-sided renal colic, with frequency and darkening of the urine, and he passed multiple (at least 20), small (1 to 3 mm), round, brown stones composed of calcium oxalate. The serum . . .

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