Naturally occurring xanthine urolithiasis in a domestic shorthair cat.

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A five -year -old neutered male domestic shorthair cat was presented after three episodes of urethral obstruction and anuria requiring relief urethral catheterisation . A double contrast cystogram revealed the presence of multiple small cystoliths which were radiolucent on plain radiographs . A perineal urethrostomy and a cystotomy were performed to relieve the urethral obstruction and to remove the cystoliths . Quantitative analysis revealed the cystoliths to be composed of 100 per cent xanthine . Clinical history suggested the xanthinuria to be naturally occurring . Unfortunately , the cat was killed in a road traffic accident two months after the surgical procedure , preventing further long -term assessment .