Male, 50 years old. Pain. MENISCI: There is a complex tear of the medial meniscus involving the body and posterior horn with increased signal intensity replacing the undersurface fibers of the body of the meniscus posteriorly and blunting of the posterior horn. Furthermore, there is an ovoid focus of low signal intensity immediately anterior to the root of the posterior horn that likely represents a displaced meniscal fragment. The anterior horn is intact. The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: We see no fluid-filled articular cartilage defects. Bone marrow signal intensity is normal.LIGAMENTS: The cruciate and collateral ligaments are normal. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
Complex tear of the medial meniscus with displaced meniscal fragment as described above.