24-year-old male basketball player with left knee pain and effusion going on for one year. MENISCI: Note is made of linear increased signal abnormality within a blunted posterior horn of the lateral meniscus which extends to the tibial articular surface consistent with a horizontal cleavage tear. The medial meniscus appears intact.ARTICULAR CARTILAGE AND BONE: Heterogeneous bone marrow signal abnormality may represent residual islands of red marrow. Note is made of a focal full-thickness articular cartilage defect along the medial facet of the patella.LIGAMENTS: The cruciate and collateral ligaments. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Horizontal cleavage tear of the posterior horn of the lateral meniscus with knee joint effusion as described above.2. Focal full-thickness articular cartilage defect along the medial facet of the patella.