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Fig. 2A. —22-year-old man with suspected meniscal tear who was injured playing collegiate football. Sagittal spin-echo MR image (TR/TE, 2583/75) through lateral compartment shows sharply marginated, fluidfilled defect in articular surface of lateral femoral condyle (between arrows), which was seen by both observers. Subchondral edema was seen only by observer 1.