Pain and swelling of right knee, evaluate for ACL, MCL, and meniscal injury. MENISCI: There is a complex, bucket-handle-like tear of the medial meniscus with displacement of meniscal tissue centrally within the medial compartment. Additionally, there is a near-full-thickness radial tear through the posterior horn of the lateral meniscus near its root at the interface with the meniscofemoral ligament of Wrisberg.ARTICULAR CARTILAGE AND BONE: There is edema within the lateral tibial plateau posteriorly representing a bone contusion. There is cyst formation in the medial tibial plateau posteriorly that we suspect is chronic. There is a focal cartilage defect along the medial femoral condyle above the torn posterior horn of the medial meniscus. There is moderate degeneration of the articular cartilage of the patella, particularly along the lateral facet, which includes foci of full-thickness cartilage loss. There is relatively mild partial thickness degeneration of the articular cartilage of the femoral trochlea centrally.LIGAMENTS: There is a full-thickness tear of the ACL with slight anterior translation of the tibia relative to the long axis of the femur. Distally, the superficial band of the medial collateral ligament appears torn, along with the patellotibial fibers of the medial retinaculum. An associated fluid collection along the anteromedial aspect of the proximal tibia likely represents a hematoma. The iliotibial band and biceps femoris tendon appear intact. Increased signal intensity within the proximal fibers of the lateral collateral ligament proper likely represents a sprain or partial tear. The popliteus tendon appears intact, although there is mild edema within the popliteus muscle. Additional edema within the soft tissues posterior to the fibular head raises concern for additional posterolateral corner (e.g., arcuate/popliteofibular ligament) injury. EXTENSOR MECHANISM: There is an incomplete tear of the patellar tendon predominantly involving the medial half of the tendon. The quadriceps tendon appears intact.ADDITIONAL
Extensive injury to the knee, including medial and lateral meniscal tears, anterior cruciate and medial collateral ligament tears, tearing of the patellar tendon, and other findings as above.