Today’s case is a 5-month-old female neutered mixed breed dog. Adopted from shelter with pelvic limb lameness. What is your radiographic diagnosis?
There is a transverse fracture of the distal left femoral diaphysis that extends to the caudal aspect of the distal femoral physis. The fracture margins are rounded with smooth hypertrophy of new bone surrounding each fragment. There is no bridging callus present. The left femur is shorter compared to the right. There is diffuse osteopenia of the left femur and moderate muscle atrophy. There is increased soft tissue opacity within the left stifle joint, and an osteophyte is present on the distal patella. The remainder of the pelvic limb appears normal. The right pelvic limb is provided for comparison.
- Hypertrophic non-union fracture with possible physeal involvement
- Stifle effusion may be secondary to ligamentous trauma or meniscal trauma
Due to the age of the fracture, internal fixation was not performed. Activity restriction and physical therapy were recommended.