29-year-old female with a history of trochlear microfracture in 2012. Evaluate healing. Evaluate for new chondral injury. Presents with left knee pain. MENISCI: The medial and lateral menisci appear intact.ARTICULAR CARTILAGE AND BONE: There is focal irregularity of the surface of the medial facet of the femoral trochlea, presumably representing the site of prior microfracture. There is increased signal intensity within the overlying articular cartilage with what appears to be focal full-thickness cartilage loss that we suspect has progressed when compared to the prior study. There is also mild edema-type signal within the underlying bone. The lateral facet of the femoral trochlea appears normal. The articular cartilage of the patella appears intact. There is degeneration of the articular cartilage of the medial femoral condyle posterior to the anterior horn of the medial meniscus over a diameter of at least 1 cm, with new small foci of full-thickness degeneration and edema within the underlying subchondral bone. The articular cartilage of the lateral compartment is relatively spared. There are tricompartmental osteophytes. LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Postsurgical changes of prior medial trochlear microfracture with overlying cartilage degeneration which appears to have progressed when compared to the prior study.2. Progression of degeneration of the articular cartilage along the medial femoral condyle with new small full-thickness defects.3. Loose bodies within the joint, posteriorly, as described above.