In industrialized countries, calcium oxalate is the most common type of urinary stone. Multiple series report that 36% to 59% of all stones are calcium oxalate stones.1 The remaining stones (in descending order of prevalence) are calcium phosphate, struvite (which is associated with infection), uric acid, and cystine. Many stones are made up of a combination of compounds.
REFERENCE 1. Preminger GM: Medical management of urinary calculus disease. Part II. Classification of metabolic disorders and selective medical management. AUA Update Series 1995;14:1-8.