Foreign Body Stones in the Urinary Bladder of Two Children

Bladder calculi rarelyseen in children and are usually a manifestation of an underlying pathologic condition of the lower urinary tract, metabolic disease, voiding dysfunction, urinary infection, obstruction, or foreign body retention. However, a forgotten double j stent and a ruptured Foley balloon-induced bladder stone are an unusual complication for children. We report two case of bladder stone induced by a fragment of a ruptured Foley balloon and forgotten double j stent . The bladder stone and balloon fragment and stent were successfully removed by cystoscopy by using a holmium:yttrium-aluminum-garnet (Ho-YAG) laser lithotripter