Canis ISSN: 2398-2942

Sesamoid: fracture

Contributor(s): Michael Guilliard

Introduction

  • Cause: trauma.
  • Signs: acute onset lameness with soft tissue swelling and pain around sesamoid bones.
  • Reduced range of movement of metacarpo/metatarso-phalangeal joints.
  • Pain and crepitus on flexion and extension of the affected joint.
  • Diagnosis: history, signs, radiography.
  • Treatment: conservative support dressings adequate for pet dog; surgical removal of fractured sesamoid is usual in sporting dogs.
  • Prognosis: good.

Pathogenesis

Etiology

  • Sesamoid bone fractures due to direct trauma or mechanical overload.

Pathophysiology

  • Acute trauma.
  • Configuration may be slab, mid-body, sagittal or chip fractures.
  • Sesamoid bones 2 and 7 more prone to injury as the flexor tendons lie centrally between the paired sesamoid bones in digits 3 and 4 but are offset in digits 2 and 5 to exert more pressure on sesamoids 2 and 7.

Diagnosis

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Treatment

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Outcomes

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Further Reading

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