Abstract
A case involving a giant hourglass-shaped calculus located partly in the prostatic urethra and partly in the bladder. Such stones have earlier been observed as a rare complication after transvesical prostatectomy, especially in cases where non-absorbable sutures were used. In the present patient with a neurogenic bladder disease, prostatic concretions migrating into the bladder gave rise to the nidus of the stone.