54-year-old male with pain after twisting injury, evaluate for lateral meniscal tear Please note that due to a technologist error, sagittal T2 FS sequences were not obtainedMENISCI: There is blunting of the free edge of the posterior horn of the lateral meniscus which may reflect a prior partial meniscectomy, however fluid signal intensity is noted entering the free edge of the blunted posterior horn indicating a horizontal tear. There is lateral extrusion of the body of the lateral meniscus with intermediate signal intensity within the body extending to the tibial articular surface which may represent additional tearing or intrasubstance degeneration that pre-existed the meniscectomy. The anterior horn of the lateral meniscus is intact. There is a heterogeneous collection of near fluid signal intensity along the superior aspect of the extruded lateral meniscal body likely represents either a parameniscal cyst or focus of synovitis. The posterior horn of the medial meniscus appears slightly diminutive in size with blunting of the free edge and intrasubstance signal extending to the tibial articular surface, suggestive of fraying/degenerative tearing. The body and anterior horn of the medial meniscus is intact.ARTICULAR CARTILAGE AND BONE: There is full thickness degeneration of the articular cartilage along the posterior lateral femoral condyle as well as mild diffuse thinning within the remainder of the lateral compartment. Osteophytes are present along the anterior aspect of the medial femoral condyle with thinning of the overlying cartilage; otherwise the medial compartment cartilage is relatively spared. There is a full-thickness fissure within the articular cartilage along the inferior aspect of the trochlea. There is mild diffuse thinning of the articular cartilage of the patella.LIGAMENTS: The proximal ACL appears thinned, which may represent an old partial thickness tear; however there is no evidence of an acute tear. The PCL is intact. The proximal MCL appears thickened, which may represent old injury. The lateral collateral ligament complex is intact.EXTENSOR MECHANISM: The extensor tendon is intact.ADDITIONAL
1.Findings suggestive of prior arthroscopy and partial meniscectomy. There also appears to be a tear involving the free edge of the posterior horn of the lateral meniscus with additional possible meniscal tears as described above.2.Osteoarthritis and other findings as described above.