Spontaneous erosion of ureterocele wall by stone: rare images.

The incidence of ureterocele at autopsy is estimated to be in 1/500 to 1/4000. A solitary stone in a single ureterocele is common, with a prevalence of 4%-39%. However, spontaneous rupture of the ureterocele wall by a stone has not been reported, to the best of our knowledge. We report the case of a 35-year-old man with right-side ureterocele, complicated by a stone that spontaneously eroded the ureterocele wall.