This article originally appeared in the Winter 2024 issue of EquiManagement. Sign up herefor a FREE subscription to EquiManagement’s quarterly digital or print magazine and any special issues.Podotrochlosis affects approximately 10% of the equine population, primarily Quarter Horses, Thoroughbreds, and warmbloods. | Shelley Paulson
Forelimb lameness caused by pain isolated to the caudal heel negatively affects horses’ athletic performance and welfare. Historically, forelimb heel pain that blocked out using a palmar digital nerve block was quickly attributed to degeneration of the navicular bone, leading to a navicular syndrome diagnosis. We now know navicular syndrome affects more than just the bone and that caudal heel pain can stem from degeneration and inflammation of any structures comprising the podotrochlear apparatus. Hence, the term podotrochlosis has replaced the ambiguous navicular syndrome, giving a more encompassing view of the cause of lameness.
With the modernization of the name came advances in diagnosis as well as treatment. In this article, we’ll review the podotrochlear apparatus, the presentation of podotrochlosis, and relevant information from recently published articles, including the use of various imaging modalities and osteostixis for treating affected horses.
The Podotrochlear Apparatus and its Degeneration
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