Page 201 - Equine Clinical Medicine, Surgery and Reproduction, 2nd Edition

176 CHAPTER 1

VetBooks.ir 1.336 Fig. 1.336 Mediolateral radiograph of the shoulder
showing a well-demarcated osseous cyst-like lesion in
the distal scapula surrounded by a sclerotic rim.

Figs. 1.337, 1.338 Arthroscopic images of the
yearling Thoroughbred in 1.334 and 1.335 showing
marked irregular contour of the articular cartilage
on the distal scapula (1.337). Probing of the cartilage
showed loose attachment of the cartilage from
underlying diseased subchondral bone (1.338).
1.337 1.338

joint disease. Intra-articular medication may help DYSPLASIA
to resolve clinical signs associated with OCLL in
the shoulder. Arthroscopic debridement is pos- Definition/overview
sible but can be a challenge due to the location of Dysplasia of the scapulohumeral joint is associated
the cyst. with miniature horses such as Shetland ponies.

Prognosis Aetiology/pathophysiology
Shoulder OCD is often associated with secondary Malalignment of the humeral head and glenoid cav-
joint disease and a poor prognosis. ity during development of the scapulohumeral joint
can result in pain and instability.