Chemical composition of upper renal tract calculi in Multan.

Objective: To study the chemical composition of upper renal tract (renal and ureteric) calculi in Multan. Setting: Department of Urology, Nishtar Hospital, Multan. Study period: Septemeber 1992 to February 1999. Material and Methods: A total of 700 renal and ureteric calculi were analyzed by chemical method of Hodgkinson. Results: The commonest were uric acid (28.1 %) calculi, followed in frequency by calcium oxalate calculi (26.1%), mixed calculi containing calcium oxalate and uric acid (21.8%) and calculi containing calcium oxalate and calcium phosphate (10.4%). Other variety of calculi were less common. Conclusion: Uric acid, calcium oxalate and mixed uric acid and calcium oxalate calculi are the main types in Multan region.