64-year-old male with left knee pain. Evaluate for lateral meniscus tear. MENISCI: There is a vertically oriented intermediate signal intensity traversing the peripheral aspect of the posterior horn of the medial meniscus compatible with a vertical tear. The anterior horn of the medial meniscus appears normal. The lateral meniscus appears normal.ARTICULAR CARTILAGE AND BONE: There is generalized thinning of the articular cartilage of the medial femoral condyle with areas of full-thickness intermediate signal intensity defects traversing the articular cartilage of the medial femoral condyle with adjacent bone marrow edema. The articular cartilage of the tibia appears normal. There is mild subchondral bone marrow edema within the medial tibial plateau. There are focal areas of partial thickness fissures within the articular cartilage of the mid femoral trochlea. There is small amount of bone marrow edema within the lateral facet of the patella. The articular cartilage of the patella appears normal.LIGAMENTS: The cruciate and collateral ligaments appear normal.EXTENSOR MECHANISM: The extensor mechanism appears normal and intact throughout its course.ADDITIONAL
1. Findings compatible with a vertical tear of the posterior horn of the medial meniscus. No evidence of lateral meniscus tear as clinically questioned.2. Articular cartilage defects affect the medial femoral condyle and trochlea. 3. Small joint effusion about the knee. Other findings as described above. 