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Aneurysmal bone cyst in a six-month-old dog.
R T Pernell1, R W Dunstan, C E DeCamp
1Department of Small Animal Clinical Sciences, Michigan State University, East Lansing 48824-1314.
Journal of the American Veterinary Medical Association
|December 15, 1992
Summary
Aneurysmal bone cysts are rare in young Yorkshire Terriers, often presenting as pathologic fractures. This case highlights a young dog with an aneurysmal bone cyst, leading to limb amputation.
Area of Science:
- Veterinary Pathology
- Canine Orthopedics
Background:
- Aneurysmal bone cysts (ABCs) are rare, benign bone lesions typically seen in skeletally mature dogs.
- This case report details an unusual presentation of an ABC in a very young, small-breed dog.
Observation:
- A 6-month-old Yorkshire Terrier presented with acute forelimb lameness due to a Salter-Harris type IV fracture.
- Radiographs showed an osteolytic lesion in the distal humerus, indicative of a pathologic fracture.
- Histopathology revealed hemorrhage, dilated vascular spaces, hemosiderin-laden macrophages, and giant cells.
Findings:
- A diagnosis of aneurysmal bone cyst was established based on clinical, radiographic, and histopathologic findings.
- The lesion was associated with a pathologic fracture of the humeral lateral condyle.
- Limb amputation was performed, resulting in a favorable outcome for the patient.
Implications:
- This case expands the known demographic for aneurysmal bone cysts in dogs, challenging the typical age and size predilection.
- It underscores the importance of considering ABCs in young dogs with apparent traumatic fractures and osteolytic lesions.
- Early diagnosis and appropriate management are crucial for successful treatment of these rare bone pathologies in canines.