A childhood blast victim presenting with bladder stone in adulthood-A rare case report of retained blast fragment with secondary stone.

Secondary bladder stones in young adults are usually a result of bladder outlet obstruction secondary to urethral stricture disease or neurogenic bladder. Foreign body inside bladder is a perfect nidus for the development of secondary bladder stone. We report a rare case of bladder stone in a young adult developing on the retained blast fragment inside bladder.