Reason: L knee meniscus tear History: L knee pain MENISCI: The medial and lateral meniscus appear intact. There is globular signal within the posterior horn of the medial meniscus indicating intrasubstance degeneration.ARTICULAR CARTILAGE AND BONE: There is a full-thickness articular cartilage cleft along the median eminence of the patella. There is also a focal near full-thickness to full-thickness articular cartilage cleft along the lateral facet of the patella. There is blistering of the articular cartilage along the medial facet of the patella. There is partial-thickness articular cartilage degeneration along the weightbearing surface of the medial femoral condyle above the posterior horn of the meniscus. There is focal full-thickness articular cartilage degeneration along the anterior aspect of the medial tibial plateau with underlying subchondral signal abnormality and cyst formation. There is a focus of low signal intensity within the medial femoral condyle which likely represents a benign bone lesion.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Focal full-thickness articular cartilage clefts and degeneration most pronounced along the patellofemoral articulation.2. 4 mm focus of susceptibility artifact within the subcutaneous tissue along the anterior and medial aspect of the knee which may reflect postsurgical change although this could represent a foreign body in the correct clinical context.3. The menisci appear intact.