Equis ISSN 2398-2977

Common digital extensor tendon: rupture

Contributor(s): Larry Booth, Prof Derek Knottenbelt, Graham Munroe, Chris Whitton

Introduction

  • Cause: primary: rare but may be heritable; excessive running with mare; sudden standing or other stress forces in very young foal. Secondary: to flexural deformities of carpus/metacarpophalangeal joint.
  • Signs: fluctuant swelling on dorsolateral aspect of distal carpus; slight flexion at carpus; abnormal gait.
  • Diagnosis: palpation, radiography, ultrasound.
  • Treatment: rest and supportive/protective bandaging (surgery with debridement +/- suture tendon unnecessary).
  • Prognosis: good.
Print off the Owner factsheet on Tendon injuries to give to your clients.

Pathogenesis

Etiology

Pathophysiology

  • Flexural deformity/inherited weakness/overstain   →   increased tension in common digital extensor tendon (CEDT)   →    rupture.
  • Ruptured common digital extensor tendon causes secondary tenosynovitis of the extensor sheath.

Timecourse

  • May be present at birth.
  • May develop within first few weeks of life.

Diagnosis

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Treatment

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Outcomes

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Eliashar E, Schramme M C, Schumacher J, Ikada Y & Smith R K W (2001)Use of bioabsorbable implant for the repair of severed digital flexor tendons in four horses.Vet Rec148(16), 506-509 PubMed.

Other sources of information

  • Ross M W & Dyson S J (2003)Rupture of the Common Digital Extensor Tendon.In:Diagnosis and Management of Lameness in the Horse.Saunders, Missouri. pp 694.


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