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

¹ Bell Equine Veterinary Clinic, Mereworth, Maidstone, Kent ME18 5GS
² Department of Large Animal Medicine, University of Georgia, Athens, Georgia, USA
³ Department of Radiology, Matthew J. Ryan Hospital, University of Pennsylvania Veterinary School, Spruce Street, Philadelphia, USA

The records of 41 horses with previously undiagnosed foot pain that had been examined by standing magnetic resonance imaging were reviewed and follow-up information was obtained from their owners two years after the examination. A range of soft tissue and osseous abnormalities were identified, with multiple lesions frequently occurring. Deep digital flexor tendonitis was recorded in 12 of the horses, and distension of the distal interphalangeal joint was identified in 15, but it was not always associated with lameness; in contrast, distension of the navicular bursa was always associated with lameness in the seven affected horses. Navicular bone lesions were identified in 13 of the horses, often in the absence of radiographic changes. Follow-up information was obtained for 35 of the horses, 27 of which were alive; of these, 16 had returned to their previous level of performance. Of the five horses with navicular bursal changes, four had been euthanased owing to lameness and the other had returned to work at a reduced level.

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