Rare non-papillary lithiasis of calcium oxalate monohydrate generated on a central core of potassium urate

Abstract

This report describes a patient who developed a spheroidal calculus with a central part composed of potassium urate, surrounded by a continuous layer of calcium oxalate monohydrate with crystals of calcium oxalate dihydrate on the surface. The mechanism of calculus development is also suggested.

Keywords

• Potassium urate
• Calcium oxalate monohydrate
• Renal calculus