Variability in stone composition and metabolic correlation between kidneys in patients with bilateral nephrolithiasis.

Purpose: To evaluate the clinical significance of discordant stone analyses in patients undergoing bilateral ureteroscopy.

Materials And Methods: A retrospective chart review was performed for all patients undergoing stone extraction with bilateral ureteroscopy at our institution in an aim to identify patients who had bilateral stone analysis and 24-h urine chemistry data available. Stones were then classified based upon the dominant present (> 50%).