Introduction

• Rare, congenital.
• Signs: recurrent lameness (uni- or bi-lateral) between 3-10 months old.
• Begging posture.
• Better hindquarter development - may attempt to walk upright on hindlimbs.
• Treatment: conservative.
• Diagnosis: signs, radiography.
• Prognosis: fair - lameness may improve with age.
• Breed predilection (toy poodle and sheltie breeds) for medial luxations without trauma.

Pathogenesis

Pathophysiology

• Congenital abnormality of scapulohumeral joint.

• Flattened or convex glenoid and relatively large humeral head.
• Acromion most commonly displaced laterally, ie medial luxation.
• May be bilateral.

Diagnosis

Treatment

Outcomes