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  Discussion on Research Study: Shoulder OC
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DrO

Posted on Wednesday, Nov 19, 2008 - 6:39 am:

An interesting study that reviews a large number of shoulder OCD cases. We knew the prognosis was not good for intensive exercise endeavors but the 64% success for less stressful endeavors was encouraging. This is the first report I have seen that compares conservative and surgical therapy and is often the case with OC case review summaries essentially there was no difference in outcome.
DrO

Vet Comp Orthop Traumatol. 2008;21(5):406-12.
Scapulohumeral osteochonDrOsis. A retrospective study of 32 horses.

Jenner F, Ross MW, Martin BB, Richardson DW.
University Veterinary Hospital, University College Dublin, Belfield, Dublin 4, Republic of Ireland. E-mail: florien.jenner@ucd.ie.

OBJECTIVES: To review the outcome of equine shoulder osteochonDrOsis (OC) with surgical or conservative treatment. METHODS: Retrospective study of 32 horses, less than two years of age, with scapulohumeral joint (SHJ) OC. The lesion severity was graded based on measurements taken from lateromedial radiographs. Follow-up information was obtained from racing records or telephone conversations with owners. Successful outcome was defined as the ability of the horse to perform its intended use. RESULTS: Sixteen of 32 horses were affected bilaterally (48 joints). Eleven of 16 horses with bilateral OC underwent arthroscopic surgery; five had bilateral arthroscopy, six had unilateral arthroscopy of the most severely affected joint. Eight of 16 horses with unilateral OC underwent arthroscopy. The overall outcome was 'poor'. Only 15.4% (4/26) of potential race horses started a race, whereas 67% (4/6) non-racehorses were 'sound' for the intended use. Statistical analysis evaluating the effect of breed on outcome showed a statistically significant difference. There were no significant interactions between outcome and gender, affected limb, unilateral versus bilateral involvement, treatment or severity of the radiographic lesion. However, radiographic lesion severity on the humerus and glenoid showed significant positive correlation. CLINICAL SIGNIFICANCE: The overall poor prognosis for shoulder OC in young horses appears to be, in part, dependent on breed and intended use. There was not any difference in outcome between surgically and conservatively treated horses.
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