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Keywords:

  • horse;
  • desmitis;
  • collateral ligament;
  • tarsus;
  • lameness

Summary

Severe lameness, tarsocrural joint effusion and medially focused peritarsal swelling combined with focal pain on palpation are clinical signs suggestive of acute injury to the medial tarsal collateral ligament. Diagnosis can be made on physical examination and ultrasonographic findings; however, magnetic resonance imaging may provide more information especially with subtle injury. Acute exacerbation of the injury during the prolonged convalescence is common. The prognosis for medial tarsal collateral ligament desmitis appears good for survival but fair for return to previous levels of performance and requires prolonged periods of rest and a controlled exercise programme.