Equine Pathology Workbook

Common cases of tenosynovitis are:

Windpuffs/windgalls

 Extensor tenosynovitis of carpus/tarsus

Thoroughpin

Superficial Digital Flexor Tendon Luxation Superficial digital flexor tendon luxation occurs when the SDF tendon of the subluxes or luxates off the point of hock. This is a rare but serious condition.

limb

SDFt luxation occurs when the ligament that attaches the SDF tendon to the is disrupted through direct trauma to the calcanean tuber or from tendonitis of the common calcanean tendon. Signs & symptoms include acute and moderate to severe lameness, swelling over the point of hock (initially looks like a capped hock), pain on palpation, movement of the SDF tendon off the point of hock either medially or (more common). In some horses the tendon only luxates when the horse moves, in others it remains permanently displaced.

Diagnosis is through signs & symptoms, palpation, ultrasound and x-ray to rule out an avulsion fracture of the calcanean tuber.

Treatment involves repair of the ligament with prolonged rest and limb immobilization in a bandage or cast for 6 weeks. In the acute stages sedation and analgesics are often given. After removal of cast, another 8 weeks of confinement is prescribed with 6 month prolonged rest. CEP when/if returning to work. Surgical fixation has proved unreliable due to high risk for re-tearing of the ligament. Prognosis is poor for athletic return. Those with a laterally placed SDF have a better prognosis versus a horse with a medial placed SDF tendon. The horse will remain lame, seen as jerky hind limb action. Horses tend to cope well and may still be useable for moderate - light activities.

Flexural Limb Deformity - Flaccidity of Flexor Tendons in Foals Flaccidity of the flexor tendons is most commonly seen in

.

The exact cause is unknown, though it is thought to be linked to systemic illness or a lack of weight-bearing activity.

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