[Treatment of suture-thread stones in the kidney by percutaneous nephrolithotripsy. Report of a case].

Percutaneous nephrolithotripsy was performed successfully to the stones in the left kidney, in which pyelolithotomy had been done three years earlier. There were foreign body stones with silk sutures used in the previous surgery as the nuclei. All the stones were removed, and a stricture in the renal pelvis was liberated endoscopically. No reports of endoscopic management to foreign body stones in a kidney are found in the Japanese literature. A few ways of the treatment are discussed.