Today’s case is a 7-year-old male neutered Labrador retriever. Owner noticed a lump on his left hock about 5 days ago. What are your findings?
There is a thin, radiolucent fracture line present in an oblique orientation on the proximal talus. This is best seen on the caudocranial projection. There is new bone proliferation on the medial and lateral aspects of the talus near the fracture margin. There is increased soft tissue opacity at the level of the tarsocrural joint indicating effusion. On stressed projections, the medial tibiotarsal joint is slightly widened. The arrows indicate the direction of stress applied to the joint.
Note – was not a true fracture.
Chronic, non displaced fracture of the left talus with marked tarsocrural effusion and osteoarthrosis. Mild joint instability may indicate disruption of the medial collateral ligaments.