SILICA STONE DEVELOPMENT DUE TO LONG-TIME ORAL TRISILICATE INTAKE

We report a case of a 30-year-old female who had a long-term history o f trisilicate-containing antacid intake for gastric discomfort. She ha d experienced repeated attacks of renal colic. Neither intravenous pye lography nor ureteroscopy could define the presence of calculi. The me tabolic evaluations were normal. However, X-ray diffraction revealed a silicate stone. We suggest that the attack of renal colic in those pa tients with long-term history of trisilicate intake should arouse the possibility of silica urolithiasis.