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In this study, kindly provided by Donnington Grove Equine Vets, we look at the case of a 2-year-old thoroughbred racehorse who presented acutely right hind lame. Initial radiographs revealed an incomplete minimally displaced lateral condylar fracture.


Upon admission to the hospital, additional radiographic projections were acquired. On flexed dorsoplantar radiographs, a radiolucent line was noted extending along the axial aspect of the lateral proximal sesamoid bone indicating a suspected additional fracture line.

Figure 1 shows a possible second fracture at the lateral proximal sesamoid bone (green arrow).

CT Findings

Further imaging with Hallmarq’s Vision CT enabled a more quantitative and precise evaluation, conclusively confirming the existence of a second non-displaced fracture line extending proximodistally through the axial aspect of the lateral proximal sesamoid bone.

Figure 2 shows the fracture of the lateral condyle on 3D reconstruction (green arrows)
Figure 3 shows a fracture of the lateral condyle on 3D volume rendering
Figure 4 shows the fracture line of the lateral proximal sesamoid bone on the frontal and transverse plane

The horse underwent surgical reduction and stabilization of the lateral condylar fracture under standing sedation. No additional treatment was pursued for the sesamoid fracture due to the challenges associated with accessing the site.


Although the treatment plan remained unchanged, the presence of the lateral sesamoid fracture impacted the prognosis, making it less favorable. The CT scan facilitated a more precise prognosis and informed adjustments to the management plan accordingly.

With thanks to surgeon Dr Henry O’Neill, Donnington Grove Equine Vets, UK, for sharing this case with us.


Vision CT