[2,8-dihydroxyadenine urinary calculus: the significance of exact physical calculus analysis].

A 21-year-old female patient was treated with Uralyt-U for 3 months for a radiolucent kidney stone. During this therapy the stone increased significantly in volume. After treatment by ESWL, the stone was analyzed by a chemical method and by X-ray diffraction. Calcium phosphate and urate were detected by the chemical method and 2,8-dihydroxyadenine by X-ray diffraction. This case report emphasizes the importance of precise stone analysis for medical treatment is emphasized.