Female 44 years old Reason: right knee meniscus tear History: pain and swelling MENISCI: Slight attenuation of the posterior horn of the medial meniscus that may reflect interval partial meniscectomy. A small focus of intermediate signal intensity along the undersurface of the remainder of the posterior horn of the medial meniscus may simply represent residual degenerative signal within the meniscus although we cannot completely exclude a small undersurface tear. More concerning however is replacement of the body of the medial meniscus with increased signal intensity, best seen on the coronal sequences, suggesting a large radial tear. The anterior horn of the medial meniscus appears intact. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is a new full-thickness defect of the articular cartilage on the weight-bearing surface of the medial femoral condyle measuring between 1.0 and 1.5 cm in greatest dimension. There is extensive edema within the underlying medial femoral condyle. There is also a large full thickness defect of the articular cartilage at the anterior aspect of the medial femoral condyle extending into the trochlea measuring between 1.0 and 1.5 cm in greatest dimension which is new from prior study. There is focal partial thickness degeneration of the articular cartilage of the lateral facet of the patella. The articular cartilage of the lateral joint compartment appears intact.LIGAMENTS: The anterior cruciate ligament now appears thickened and of increased signal intensity in a pattern suggestive of mucoid degeneration with small foci of signal abnormality within the adjacent tibial plateau and intracondylar notch of the femur. The posterior cruciate ligament is intact. There is edema along the superficial fibers of the medial collateral ligament that could represent a sprain in the correct clinical context. The deep fibers of the medial collateral ligament appear abnormally thickened which could represent tearing related to the aforementioned medial meniscus abnormalities. The lateral collateral ligament complex is intact.EXTENSOR MECHANISM: There is mild edema along the anterior margin of the patellar tendon but the patellar tendon and quadriceps tendon appear intact.ADDITIONAL
1. Post operative changes of the medial meniscus as described above with findings suggestive of a new large radial tear through the body of the medial meniscus.2. New full-thickness cartilage defects along the medial femoral condyle as described above with new edema in the medial femoral condyle as well.3. Thickening and increased signal intensity in the anterior cruciate ligament suggesting progression of mucoid degeneration.4. Other findings as described above.