21-year-old male with instability, knee pain and locking. MENISCI: The medial and lateral menisci are intact.ARTICULAR CARTILAGE AND BONE: There is a full-thickness focal defect of the articular cartilage of the weightbearing surface of the medial femoral condyle (series 501/25) measuring approximately 3 mm in length with underlying bone marrow edema. The remaining articular cartilage appears to be intact.LIGAMENTS: The medial collateral ligament and lateral collateral ligament complex are intactEXTENSOR MECHANISM: Extensor mechanism is intact.ADDITIONAL
Full-thickness articular cartilage defect of the weightbearing surface of the medial femoral condyle and small joint effusion.