Authors of section


Jörg Auer

Executive Editor

Jörg Auer

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Degenerative scapulohumeral joint disease

Causes and clinical signs

The origin of degenerative joint disease development in the scapulohumeral joint may be a traumatic event or develop slowly over a period of time. It is almost exclusively diagnosed in ponies and Mini Shetland ponies.

The animal shows a chronic lameness and, in long standing cases, partial atrophy of the shoulder muscles. The animal shows a shortened protraction phase of the limb during walking.



Radiographs usually show the nature of the problem.

The craniocaudal view (left) depicts a defect in the humeral joint surface which is presently occupied by the medial edge of the glenoid resulting in a subluxation of the joint.

The lateral view (right) shows superimposition of the scapular and humeral joint surfaces (arrow).