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Figure 7. Drawings illustrate the Sakakibara arthroscopic classification scheme for mediopatellar plicae: Type A, which consists of a cordlike elevation in the synovial wall (arrow); Type B, which has a shelflike appearance (arrow) but does not cover the anterior surface of the medial femoral condyle; Type C, which is large with a shelflike appearance (arrow) and covers the anterior surface of the medial femoral condyle; and Type D, in which the plica (arrow) has a central defect (fenestrated plica).
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