This case doesn't involve ingested rocks but "rocks" or stones (cystic calculi) that can form in the bladder when minerals that are normally dissolved crystalize out in the urine. At first the crystals are microscopic but can build on each other like a lattice work until they are large enough to irritate the bladder lining or even block the flow of urine. I've seen bladder stones that ranged from the size from grains of sand to hen's egg. These photos show the stones visible on x-ray, the stones following surgical removal, and the placement of the last suture in the bladder following removal. The patient is an 8 year old Miniture Schnauzer.
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