Equis ISSN 2398-2977

Straight sesamoidean ligament: desmitis

Contributor(s): Larry Booth, Oliver Crowe, Graham Munroe, Vetstream Ltd, Chris Whitton

Introduction

Pathogenesis

Etiology

  • Tendon fatigue.
  • Direct trauma.

Predisposing factors

General

Pathophysiology

  • Forelimb > hindlimb.
  • Straight sesamoidean ligament (SSL) injury is uncommon and may not result in pastern swelling or heat in the acute phase.
  • May occur alone or with oblique sesamoidean ligament (OSL)   Oblique sesamoidean ligament: desmitis  and/or other soft tissue injuries   Proximal sesamoid: sesamoiditis  .
  • Subsequently:
    • Swelling may develop, but can be difficult to palpate with distal lesions.
    • Pain may be elicited on palpation in the palmar midline of the pastern region.
  • Concurrent effusion may occur in the digital flexor tendon sheath (DFTS).
  • Suspensory ligament (SL) rupture may   →    loss of tension in SSL   →    instability or palmar/plantar luxation of the proximal interphalangeal (PIP) joint.
  • Avulsion fracture of the insertion of the SSL to the proximal apsect of the middle phalanx has been described   →    areas of periosteal proliferative change.

Diagnosis

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Treatment

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Outcomes

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Smith S, Dyson S J & Murray R C (2008)Magnetic resonance imaging of distal sesamoidean ligament injury.Vet Radiol Ultrasound49(6), 516-528 PubMed.
  • Sampson S Net al(2007)Magnetic resonance imaging features of oblique and straight distal sesamoidean desmitis in 27 horses.Vet Radiol Ultrasound48(4), 303-311 PubMed.
  • Schneider R Ket al(2003)Desmitis of the straight sesamoidean ligament in horses: 9 cases (1995-1997).JAVMA222(7), 973-977 PubMed.

Other sources of information

  • Dyson S J & Genovese R L (2011)Straight Sesamoidean Desmitis.In:Diagnosis & Management of Lameness in the Horse. 2nd edn. Eds: Ross M W & Dyson S J. Saunders, Missouri. pp 756-759. ISBN: 9781416060697.


ADDED