title: Prostatic cavitary lesions containing urine in dogs.
abstract: OBJECTIVE
  The purpose of this retrospective study was to determine the proportion of urine-containing prostatic cavitary lesions ("urinary cysts") in dogs and to describe their clinical management.
  
  
  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 (18·4%; group 1). In 10 (62·5%) 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 (15·5%).
  
  
  CONCLUSIONS
  In dogs, 18·4% (95% confidence interval, 10·9 to 28·1%) 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.
authors.affiliation: Department of Veterinary Clinical Science, Clinic for Small Animals, Justus-Liebig-University Giessen, Giessen, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Bokemeyer
authors.forename: C
authors.initials: C
authors.lastname: Peppler
authors.forename: C
authors.initials: C
authors.lastname: Thiel
authors.forename: K
authors.initials: K
authors.lastname: Failing
authors.forename: M
authors.initials: M
authors.lastname: Kramer
authors.forename: M
authors.initials: M
authors.lastname: Gerwing
mesh_terms: D000038:Abscess / Q000175:diagnosis / Q000601:surgery / Q000662:veterinary*; D000818:Animals; D003560:Cysts / Q000175:diagnosis / Q000601:surgery / Q000662:veterinary*; D004283:Dog Diseases / Q000175:diagnosis / Q000601:surgery*; D004285:Dogs; D008297:Male; D011469:Prostatic Diseases / Q000175:diagnosis / Q000601:surgery / Q000662:veterinary*; D012189:Retrospective Studies; D014570:Urologic Diseases / Q000175:diagnosis / Q000601:surgery / Q000662:veterinary*