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Bilateral Forelimb Lameness in an 11 year-old Thoroughbred

Bilateral Forelimb Lameness in an 11 year-old Thoroughbred. Drs. Karyn Labbe and Beth Biscoe, Washington State University Dr. John Mattoon, Washington State University. Bilateral forelimb lameness in an 11 year-old Thoroughbred.

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Bilateral Forelimb Lameness in an 11 year-old Thoroughbred

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  1. Bilateral Forelimb Lameness in an 11 year-old Thoroughbred Drs. Karyn Labbe and Beth Biscoe, Washington State University Dr. John Mattoon, Washington State University

  2. Bilateral forelimb lameness in an 11 year-old Thoroughbred • Patient is a previous racehorse acquired by the owner with the intended use of barrel racing • History of intermittent lameness in both forelimbs noticed by the owner 9 months prior • No improvement was seen with a prolonged period of stall rest

  3. Primary Veterinarian Workup • Injection of both fore coffin joints resulted in transient lameness improvement for 3 months • Referring radiographs of the left front foot revealed moderate navicular bone degeneration

  4. Lameness evaluation at presentation • Patient showed a grade II/V left fore lameness, which was exacerbated by left circling • Left fore palmar digital nerve analgesia resolved the left fore lameness and resulted in the horse displaying a grade III/V right fore lameness • Right fore palmar digital nerve analgesia improved the RF lameness greater than 75%

  5. Further Imaging • The decision was made for MRI of both fore feet • Nail screening radiography prior to MRI identified a type II fracture of the right fore third phalanx

  6. Advanced ImagingMRI Left Front Foot Region • MRI Proton Density (PD) transverse images shown • Distal to proximal • 2 vitamin E capsules were placed along lateral side

  7. MRI Left Front Foot Region Sagittal Plane • Proton Density sagittal plane • Lateral to medial

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