Knee pain following injury Evaluation is slightly limited secondary to motion artifact particularly on the sagittal PD sequence.MENISCI: There is attenuation and blunting of the body of the medial meniscus compatible with a radial tear. There is also undulation of the free edge fibers of the body of the medial meniscus that likely represent the sequela of additional tearing, although could in part be due to flounce. There is horizontal signal abnormality at the junction of the posterior horn and body which extends to the tibial articular surface with additional attenuation of the posterior horn itself which both likely reflect additional tearing. There is intermediate signal intensity replacing the much of the body of the meniscus suggestive of degeneration.The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: There is severe degeneration of the articular cartilage of the medial compartment with much of the weightbearing portions of the medial femoral condyle and medial tibial plateau devoid of articular cartilage. There is flattening of the weightbearing articular surface of the medial femoral condyle with underlying subchondral sclerosis and edema. Similar but less pronounced changes affect the medial tibial plateau. There is full-thickness loss of the articular cartilage along the lateral tibial spine with degenerative signal abnormality in the underlying subchondral bone. There is diffuse articular cartilage loss of the undersurface of the patella with foci of full thickness loss particularly along the medial facet. There is degeneration of the articular cartilage of the femoral trochlea inferiorly.LIGAMENTS: There is thickening and increased signal intensity of the ACL likely representing mucoid degeneration. There is perhaps mild mucoid degeneration of the PCL as well. There is mild edema along the superficial band of MCL and perhaps within the proximal substance of the ligament itself which could represent a sprain in the appropriate clinical context but may simply relate to the adjacent medial compartment pathology. The lateral collateral ligament is intact. EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
Complex tearing of the medial meniscus and severe osteoarthritic changes of the knee with other findings described above.