Texture examinations on grain and thin section preparations of calcium oxalate calculi and their relations to pathogenetic parameters.

Texture examinations were made on 416 thin section and on 1,000 grain preparations of calcium oxalate calculi. The frequency of occurrence of four basic texture types in relation to pathological urine parameters, age and sex of the patients as well as types of stone removal are discussed. Percentage share of texture type I that correlates to hyperuricosuria shows a steady increase with increasing age. The proportions of types III and IV that are linked to hypercalciuria decrease with increasing age. The examinations show the feasibility of texture-type determinations within routine stone analysis and create the precondition for texture types to be included in metaphylaxis of calcium oxalate lithiasis.