Female 28 years old; Reason: s/p knee dislocation and reduction, assess ligamentous injury MENISCI: There is vertical signal abnormality within the peripheral fibers of the posterior horn of the medial meniscus extending to the tibial articular surface, which may represent a short partial-thickness undersurface tear of the red zone, however this is equivocal. Mildly increased signal intensity is seen in the body of the medial meniscus, without discrete tear. Globular mildly increased signal intensity is seen at the inner fibers of the body of the lateral meniscus, without discrete tear. ARTICULAR CARTILAGE AND BONE: Small foci of bone marrow edema are present at the anteromedial aspect of the medial femoral condyle. We see no discrete cartilage defects. LIGAMENTS/TENDONS: There is a complete tear of the anterior cruciate ligament, likely through its mid substance. There is a complete (or near-complete) tear of the posterior cruciate ligament at its femoral attachment. The superficial band of the MCL is intact. Overlying edema may represent a sprain. The meniscofemoral coronary ligament is not seen, and we cannot exclude the possibility of a tear. Edema in the soft tissues immediately anterior to the MCL may reflect partial disruption of the medial retinaculum; a 7-mm linear focus of low signal intensity along the anteromedial aspect of the medial femoral condyle with mild underlying edema within the bone may represent a medial retinacular/capsular avulsion fracture. The LCL is indistinct, compatible with a full thickness tear. The distal fibers of the biceps femoris tendon are also indistinct, suggestive of at least a high grade partial thickness tear. The IT band is intact. There is extensive edema along the lateral retinaculum beneath the joint line. There is edema between the biceps femoris muscle and underlying femur as well as between the gastrocnemius heads. The popliteus tendon can be traced to its femoral attachment, though appears attenuated at its femoral attachment, suggestive of a partial tear.EXTENSOR MECHANISM: No significant abnormality noted. The extensor mechanism is intact. ADDITIONAL
1. Tears of the ACL, PCL, and LCL, as described above.2. Possible medial retinaculum injury and medial meniscus tear, as described above.3. Findings suggestive of at least a partial tear of the biceps femoris tendon and possibly of the popliteus tendon.4. Other findings, as described above. 