Probable Polycystic Kidney Disease in a 10 year old Yorkshire Terrier
Tyler Anderson DVM
Age: 10 years
Gender: Male Neutered
An abdominal ultrasound and echocardiogram study were recommended due to recent elevation of ALT on senior blood work and a Grade III/VI systolic murmur. The patient was otherwise asymptomatic having no evidence of PU/PD or azotemia.
Abdominal sonographic findings:
The liver was mildly enlarged having an anechoic cyst visualized in the dorsal right liver, measuring ~ 0.7 x 0.9cm.
The kidneys were severely enlarged bilaterally (Length L/R ~ 7.9/10.9cm) having multifocal anechoic cysts throughout the cortical and medullary spaces. Almost no “normal” renal parenchyma could be visualized due to severe compression by the space-occupying cystic lesions.
A single small urinary calculus was noted in the bladder, measuring ~ 1.0mm.
The echocardiogram study revealed myxomatous mitral (mild) and tricuspid (moderate) valve disease and pulmonary hypertension (moderate).
Diagnosis and Sonographic Analysis:
Differentials for bilaterally enlarged kidneys having multifocal cavitary-cystic lesions include Polycystic Kidney Disease vs. Neoplasia vs. Renal abscess (unlikely due to the number of cysts). Aspiration or biopsy of the kidneys would be required for a definitive diagnosis. Biopsies were not performed in this patient. A prescription renal diet and serial blood work/urine sampling were recommended to monitor renal function.
Special thanks to Banfield Rockville for the interesting case.