Equis ISSN 2398-2977

Foot: lateral cartilage inflammation (quittor)

Contributor(s): Olin Balch, Simon Curtis, Graham Munroe, Vetstream Ltd

Introduction

  • Cause: trauma, penetrating injury   →   chronic purulent inflammation of collateral cartilage foot characterized by necrosis and draining sinus at or proximal to the coronet.
  • Signs: draining sinus at, or proximal to, the coronary band.
  • Diagnosis: examination of the foot and lower limb   Musculoskeletal: physical examination - adult  ; radiography   Hindlimb: radiography  .
  • Treatment: surgical curettage of the necrotic focus; antibiotics.
  • Prognosis: depends on extent of damage and adequacy of surgical curettage and drainage.
Print off the Owner factsheets on Caring for your horse's feet and Quittor to give to your clients.

Pathogenesis

Predisposing factors

General
  • More common in draught horse especially when working in pairs   →   one horse can easily tread on the other. Therefore, less common now than in the past.

Pathophysiology

  • Penetrating wound or direct trauma   →   inflammatory response unable to resolve the lesion.
  • Dead cartilage or foreign body provoke ongoing inflammation.
  • Mixed bacterial infection   →   recurrent or chronic draining sinus.
  • Emerging at or above coronet - the area of least resistance.
  • Damaged cartilage has very poor powers of healing   →   necrosis rather than regeneration   →   provokes a foreign body reaction leading to sinus development.

Timecourse

  • Chronic, developing over weeks to months.

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.
  • Smith M R W (2014) Infection of the cartilages of the foot. Equine Vet Educ 26 (11), 580-583 VetMedResource
  • Milner P & Hughes I (2012) Remedial farriery Part 3: The role of farriery in the surgical management of quittor in the horse. UK Vet 17, 4-7 VetMedResource.
  • Cullimore A & Booth T (2010) Clinical aspects of the equine foot. Part 6: The collateral cartilages. UK Vet 15 (8), 9-12 VetMedResource.
  • Reeves M J et al (1989) Miscellaneous conditions of the equine foot. Vet Clin North Am Equine Pract (1), 221-242 PubMed.


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