40-year-old male with a right knee medial mass. Assess right knee medial mass as well as for intra-articular pathology. MENISCI: The medial lateral meniscus appear intact.ARTICULAR CARTILAGE AND BONE: There is osteophyte formation along the femoral trochlea, centrally, with near full-thickness to full-thickness degeneration of the overlying articular cartilage. The bone marrow signal intensity is normal. The lateral and medial compartment cartilage appears relatively spared. LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: Extensor mechanism appears intact.ADDITIONAL
1. Large lobulated and septated medial soft tissue mass of predominantly fluid signal intensity on T2WI likely representing a ganglion or perhaps a peculiar accumulation of bursal fluid.2. Osteoarthritis of the patellofemoral joint with cartilage degeneration along the femoral trochlea. We otherwise see no intra-articular pathology.