Pelligrini-Stieda Disease

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This eponym refers to avulsion of the medial femoral condyle at the origin of the medial collateral ligament. With Pelligrini-Stieda disease, chronic trauma (and tears) to the medial collateral ligament produces ossification.
 - Click on the image for a larger versionAOblique radiograph of the knee. The typical appearance of severe Pelligrini-Stieda disease.

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