Urinary obstruction secondary to an ossifying fibroma of the os penis in a dog.
A 13-year-old, 25-kg, castrated male border collie was referred for evaluation of pollakiuria, stranguria, and a decreased urine stream. A calcified periurethral mass near the caudal aspect of the os penis was identified on survey abdominal radiographs. A retrograde contrast urethrocystogram demonstrated that the mass was compressing the penile urethra. The mass was surgically resected. A histopathological diagnosis of an ossifying fibroma of the os penis was made. This report describes an atypical presentation of a rare tumor, an ossifying fibroma, that caused a urinary obstruction in a male dog. A review of the incidence, histopathological features, and behavior of ossifying fibromas is included.
Departments of Small Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
Tatjana K
TK
Mirkovic
Cindy L
CL
Shmon
Andrew L
AL
Allen
D000818:Animals; D003937:Diagnosis, Differential; D004283:Dog Diseases / Q000175:diagnosis* / Q000601:surgery; D004285:Dogs; D018214:Fibroma, Ossifying / Q000150:complications / Q000175:diagnosis / Q000601:surgery / Q000662:veterinary*; D008297:Male; D010412:Penile Neoplasms / Q000150:complications / Q000175:diagnosis / Q000601:surgery / Q000662:veterinary*; D016896:Treatment Outcome; D014524:Urethral Obstruction / Q000175:diagnosis / Q000209:etiology / Q000601:surgery / Q000662:veterinary*