Findings:
There are radiolucent lines parallel to the physes within the metaphyses of the distal radius and ulna bilaterally. The ones associated with the ulna are more prominent.  There is a mild overlying soft tissue swelling.

 

Diagnosis and discussion:

Hypertrophic osteodystrophy.

The cause of this condition is unknown. This condition is usually seen in  large breed, rapidly growing dogs in the age range of 2-8 months. Usually there is a history of inappetance, depression, fluctuating pyrexia, palpable pain in the limbs, and soft tissue swelling in the metaphyseal regions.

The radiographic changes are usually bilateral in the limbs, although the ribs and scapulae can also be involved. The common radiographic changes are  bilateral metaphyseal radiolucent lines parallel to the physis. These represent acute suppurative osteomyelitis, necrosis, microfractures, and defective bone formation.  The condition is self limiting, and bone remodeling occurs, but sometimes some changes may persist. Relapses are also possible.

Recommended treatment is pain control with anti-inflammatory analgesics and supportive care . No specific treatment exists.