47-year-old male with tear of the cartilage or meniscus of the knee. MENISCI: Again seen is extensive tearing of the anterior horn of the lateral meniscus, including a fluid-filled horizontal component. Overall the degree of signal abnormality within the meniscus appears to have increased slightly when compared to the prior study. There is globular signal abnormality within the anterior aspect of the lateral meniscus which likely reflects mucoid degeneration that penetrates the peripheral fibers of the anterior horn, extending into Hoffa's fat pad with parameniscal cyst formation. This is contiguous with band-like low signal intensity which perhaps represents scarring from prior arthroscopy. There is a 4 mm ovoid focus of intermediate signal intensity within the aforementioned parameniscal cyst which may represent a small cartilage fragment. The tip of the posterior horn of the lateral meniscus appears slightly blunted but the posterior horn otherwise appears intact. There is increased signal intensity within the posterior body and horn of the medial meniscus suggestive of mucoid degeneration, but we see no discrete tear.ARTICULAR CARTILAGE AND BONE: The articular cartilage appears normal for age with no large fluid-filled articular cartilage defects. Bone marrow signal intensity is within normal limits. There is a broad-based bony excrescence extending from the medial aspect of the proximal fibula which likely represents a tug lesion at the soleus muscle origin, of doubtful significance.LIGAMENTS: There is mild intermediate signal intensity between the IT band and lateral femoral condyle which may reflect mild inflammation. The cruciate ligaments appear intact. The medial collateral ligament appears intact. Mild increased signal intensity within the proximal fibers of the lateral collateral ligament proper may reflect degeneration.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
Extensive tearing of the anterior horn of the lateral meniscus with parameniscal cyst formation and other findings as described above.