Bladder stone due to accidentally intravesically inserted intrauterine device.

Bladder stones occasionally develop due to foreign body in the bladder. A 45-year-old woman, who had had an intrauterine contraceptive device inserted 10 years earlier, presented with dysuria, frequency and voiding difficulty with suprapubic pain. The intrauterine device was found in the bladder with stone formation and was removed by cystoscopic procedure.