A Case Report of Proximal Radioulnar Osteosarcoma in a Great Dane Dog

Area of Science:

• Veterinary Medicine
• Oncology
• Canine Pathology

Background:

• Osteosarcoma is the most common primary bone tumor in dogs.
• It typically affects the appendicular skeleton of large and giant breeds.
• Aggressive local invasion and early metastasis are characteristic features.

Purpose of the Study:

• To report a rare case of proximal radioulnar osteosarcoma in a Great Dane.
• To emphasize the importance of early diagnosis and surgical management in canine osteosarcoma.
• To highlight the challenges in managing this condition, including financial constraints for adjuvant therapy.

Main Methods:

• Case presentation of a 3.5-year-old Great Dane with progressive lameness and swelling.
• Radiographic examination to assess the bone lesion and rule out metastasis.
• Histopathological examination following forelimb amputation with scapulectomy for definitive diagnosis.

Main Results:

• Diagnosis of proximal radioulnar osteosarcoma confirmed.
• Successful surgical management with forelimb amputation and scapulectomy.
• Good postoperative recovery with no recurrence at 6-month follow-up; adjuvant chemotherapy declined due to cost.

Conclusions:

• Early recognition and comprehensive diagnostics are crucial for canine osteosarcoma.
• Timely surgical intervention is key for managing osteosarcoma, even at rare sites.
• Adjuvant chemotherapy is recommended to prevent metastasis, though accessibility can be a barrier.