Evaluation of foot pain in the standing horse by magnetic resonance imaging.

This research paper reviews the medical records of 41 horses that were examined using standing magnetic resonance imaging (MRI) for unexplained foot pain, and it follows up on their condition two years later. The study revealed various soft tissue and bone abnormalities, and it also relates specific ailments with the horse’s ability to perform.

Study Overview

• The study looked into 41 horses presenting symptoms of undiagnosed foot pain. The method of investigation used was standing magnetic resonance imaging, a diagnostic imaging technique that provides a detailed view of the structures within the body.
• The researchers monitored these horses, and after two years, collected data concerning their status from their owners.

Findings

• The MRI scans of the horses showed a variety of soft tissue and bone irregularities, with multiple lesions often appearing.
• Deep digital flexor tendonitis was found in 12 horses. This condition affects the tendon that runs down the back of the leg to the foot, causing pain and lameness.
• Distension (swelling) of the distal interphalangeal joint was recorded in 15 horses. However, this was not always linked to lameness.
• On the other hand, navicular bursa distension (swelling of a sac filled with lubricating fluid, located under the navicular bone in the hoof) was uniformly associated with lameness in the seven horses found with this condition.
• Navicular bone lesions were identified in 13 horses, usually without any discernable changes in radiographic images.

Follow-up Results

• They were able to collect follow-up data on 35 out of the 41 horses. Out these, 27 were still alive, and 16 had returned to their prior performance level.
• Quite notably, of the five horses that had navicular bursal changes, which were always associated with lameness, four had to be euthanized due to severe lameness, and one was able to return to work, but at a reduced level.

Conclusion

• This study shows the benefits of using standing MRI to diagnose horse foot pain, identifying the underlying cause of lameness which may not be discernible by general radiographic techniques. Achieving this precise diagnosis allows for better treatment planning.
• The research also highlights the need for further investigation into the link between navicular bursal changes and severe lameness, given the observed severe consequences in the studied cases.