Arthroscopic Debridement and Fixation of Osteochondritis Dissecans Lesions of the Medial Femoral Condyle.

Unstable osteochondritis dissecans lesions of the medial femoral condyle have classically been treated with open reduction and fixation under direct visualization through an open arthrotomy. Given the value of avoiding open arthrotomies, we present an arthroscopic approach for lesion elevation, debridement, and fixation. The lesion is first elevated using an arthroscopic elevator, leaving a laterally based osseous hinge. Once elevated, fibrous debris is debrided from the base of the lesion. Subsequently, the fragment is reduced, and percutaneous transpatellar instrumentation is used for fixation. The use of this technique allows for excellent mobilization, debridement, and fixation of the osteochondritis dissecans lesion while minimizing violation of periarticular soft tissues.