Feline polycystic kidney disease in Persian and other cats: a prospective study using ultrasonography

Objective To determine the prevalence of feline polycystic kidney disease in Persian cats presented to the University of Melbourne Veterinary Clinic and Hospital between February and August 1999. Design A prospective animals was performed. A prospective clinical study using client owned Procedure Two hundred and fifty Persian cats, ranging in age from 13 weeks to 10 years, were presented to the University of Melbourne Veterinary Clinic and Hospital for ultrasound examination of both kidneys. The cats were placed in dorsal and lateral recumbency and alcohol and ultrasonic coupling gel were applied to the skin. The kidneys were examined ultrasonographically in longitudinal, sagittal and transverse planes. Results were recorded for each cat at the time of examination as either negative or positive for PKD. In addition 14 Exotics (short-haired Persians), 4 Ragdolls and 3 British Short-Hair cats were examined. Results Forty five percent of Persian cats examined were found to be positive for feline polycystic kidney disease on the basis of presence of anechoic cysts within the renal parenchyma. These cats ranged in age from 13 weeks to 10 years. Fifty per cent of the Exotic cats were positive for polycystic kidney disease whereas all Ragdolls and British Short Hairs were negative for the disease. Only one positive cat was reported to be showing clinical signs of renal disease. Conclusion The prevalence of feline polycystic disease in Persian cats presented to the University of Melbourne between February and August 1999 was 45%. Exotic cats were found to have the slightly higher incidence of 50%.