Dear Visitor,

See below some pictures of our archives.

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The cross section of a typical purine based urolith (ammonium-urate) found in dalmatians .	Classic cause of the stone formation. Foreign body in the urinary system. See the surgical suture in center of the stone.	Struvite stone from a ferret.
A rarely found type of stone, a brushite urolith from a yorkshire terrier.	In horses urolithiasis is found very seldom. In the center of this struvite + carbonated-apatite stone from a stallion a tissue residuum was found as "foreign body".	A very "nice" cystine stone from the urinary bladder of a female european short haired cat.
Purine based stones are to be found not exclusively in dalamtians, but are frequent in some other breeds too. This is a relatively big ammonium-urate stone from an english bulldog.	Microphotograph of the previous stone. On the surface small "balls" can be observed, the spheruliths.	The small uroliths - called microlith - are frequently voided spontaneously. On the microphptoto small ammonium-urate microliths of 0,1 to 0,4 mm diameter are presented.
Renal uroliths are infequent in animals. Bilateral renal stones was found in this cat with a radiographic survey.	Photo of one of the renal stones (whewellite nephrolith) of the previous patient.	A typical ultrasonographic appearence of a urinary bladder stones. Photo by T. Vrabely.