Title: Osteochondritis Dissecans<br/>Author: Brian Corwell<br/><a href='http://umem.org/profiles/faculty/294/'>[Click to email author]</a><hr/><p>
Complete or incomplete separation of the articular cartilage and subchondral bone</p>
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-70% occur at the lateral aspect of the medial femoral condyle</p>
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-Also seen in the talar dome and capitellum</p>
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Repetitive overloading leads to fragmentation and separation from surrounding bone</p>
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Prognosis better in kids than in adults</p>
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<a href="http://www.eorif.com/KneeLeg/Images/OCD4w.jpg">http://www.eorif.com/KneeLeg/Images/OCD4w.jpg</a></p>
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CC: Vague difficult to localize activity related pain and swelling. Mechanical symptoms only if loose body is present</p>
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PE: Wilson’s test</p>
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Internal tibial rotation and knee extension impinges the tibia on the OCD lesion causing pain. Pain abates with external rotation and flexion.</p>
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<a href="https://www.youtube.com/watch?v=e7zrKo41Pos">https://www.youtube.com/watch?v=e7zrKo41Pos</a></p>
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Plan of care: Limit activity and trial period of non-weight bearing for 6 weeks.</p>
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50% resolve in 10 to 18 months with conservative care.</p>
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Detached, loose or unstable fragments or failure of non-operative care will need surgery</p>