Triamterene Kidney Stones

摘要

A 64-year-old woman with a history of recurrent kidney stones presented with severe left flank pain radiating to the left lower quadrant of 4 days' duration. She brought with her a large fragmented 70-mg stone that she had passed in urine. Her medications included hydrochlorothiazide, 25 mg/triamterene, 37.5 mg.An abdominal radiograph (A) and a CT scan of the kidneys, ureters, and bladder (B) showed bilateral renal calcifications. On the right, the largest was 3 mm, and on the left, multiple punctate calcifications were evident. Urinalysis was positive for trace blood and trace leukocytes. The analysis of the stone revealed triamterene composition. The patient underwent successful placement of ureteral stents to help passage of the stones followed by lithotripsy.