Prostatic cavitary lesions containing urine in dogs

Methods: The study included dogs with clinically relevant prostatic-retention cyst/abscess (n=87) treated initially by percutaneous ultrasound-guided drainage of the prostatic cavity. Based on a prostatic fluid:serum creatinine ratio, the study population was divided into two groups: group 1 (n=16) with and group 2 (n=71) without evidence of urine within the lesion. Medical records of both the groups were reviewed. Results: Cavitary lesions containing urine were observed in 16 of the 87 dogs (18 center dot 4%; group 1). In 10 (62 center dot 5%) of the group 1 dogs, abdominal surgery was recommended, because of recurrent filling during follow-up. In group 2, abdominal surgery was recommended in only 11 of 71 cases (15 center dot 5%). Clinical Significance: In dogs, 18 center dot 4% (95% confidence interval, 10 center dot 9 to 28 center dot 1%) of the prostatic cavitary lesions contain urine. Measurement of creatinine within the prostatic cavity fluid is a helpful tool in diagnosing a presurgical intra-prostatic urethral fistulation, and these dogs tend to require a more aggressive surgical therapy than percutaneous drainage alone.