title: Haemangiosarcoma of the os penis in a dog: The most common neoplasm of the canine penis.
abstract: A castrated 9-year-old intact male boerboel cross-breed dog was presented with a month-long history of stranguria. On physical examination, a mass was noted at the caudal extremity of the os penis. Haematology, serum chemistry and urinalysis were all unremarkable. Abdominal and urethral ultrasound demonstrated an enlarged bladder and a dilated urethra, which was followed to the caudal extremity of the os penis. A hyperechoic, roughly spherical,vascularised mass was noted at the caudal os penis, which resulted in obstruction of the penile urethra. Radiographs demonstrated a soft tissue mass with osteolysis of the os penis. Cytology suggested an osteosarcoma. Treatment included amputation of the penis and adjuvant doxorubicin with carboplatin. Histopathology of the penis confirmed a haemangiosarcoma. The patient survived for 20 months. This is only the second published case report describing a penile haemangiosarcoma, and the first published report demonstrating the treatment and outcome of a case of haemangiosarcoma of the os penis. Based on published and unpublished reports, haemangiosarcoma appears to be the most common neoplasm of the canine penis.
authors: Department of Companion Animal Clinical Studies, University of Pretoria. richard.burchell@up.ac.za.
authors: Richard K
authors: RK
authors: Burchell
authors: Robert M
authors: RM
authors: Kirberger
authors: Drienie D Didi
authors: DD
authors: Janse van Rensberg
mesh_terms: D000671:Amputation, Surgical / Q000662:veterinary; D000818:Animals; D004283:Dog Diseases / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D004285:Dogs; D006394:Hemangiosarcoma / Q000473:pathology / Q000662:veterinary*; D008297:Male; D010412:Penile Neoplasms / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D010413:Penis / Q000473:pathology / Q000601:surgery