49-year-old male with right medial knee pain for 6 months with no improvement after physical therapy. Evaluate for meniscal tear versus chondral injury. MENISCI: Branching, linear signal abnormality is seen within the posterior horn of the medial meniscus extending from the root into the posterior aspect of the meniscal body, with a dominant horizontal component extending to the femoral articular surface and an additional vertically-oriented component seen more peripherally extending to the tibial articular surface. These findings are compatible with complex tear. Tiny para-meniscal cysts are seen at the periphery of the posterior horn. Anterior horn of the medial meniscus is preserved. Lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: Subjectively there is mild diffuse thinning of the femoral articular cartilage within the medial compartment without focal defect. The lateral compartment articular cartilage and patellofemoral articular cartilage are within normal limits.Bone marrow signal intensity is within normal limits.LIGAMENTS: Cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: Extensor mechanism is intact. ADDITIONAL
Complex tear of the posterior horn of the medial meniscus as detailed above.