Radiolucent urinary calculus in a transplant patient: an unsuspected cause of ureteropelvic obstruction.

The occurrence of nephrolithiasis and nephrocalcinosis in the patient who has undergone a renal transplant is rare and is usually related to parathyroid hypersecretion. A case is presented in which the patient had a radiolucent stone that arose as a result of the use of nonabsorbable sutures. It is clear that nonabsorbable sutures. It is clear that nonabsorbable sutures should be avoided in renal allotransplant recipients.