Male, 24 years old. Evaluate for left knee synovitis. History: Recurrent left knee swelling on SSA. Has CRP 37 in the past - now negative. Joint swells with any exercise. MENISCI: The menisci appear normal without evidence of tear.ARTICULAR CARTILAGE AND BONE: There is edema-type signal within the posterior aspect of the medial tibial condyle in the vicinity of the attachments of the posterior capsule and semimembranosus which appears slightly more extensive on the current study compared to the prior. There is also a small focus of subchondral signal abnormality within the tibial plateau beneath the posterior horn of the medial meniscus which was not present on prior study and may represent a small erosion (series 4, image 29). There is a tiny defect of the overlying articular cartilage at this site.There is also a small focus of edema-type signal within the anterolateral aspect of the lateral tibial plateau which is new from prior study. There is mild subarticular edema on either side of the tibiofibular joint with possible small erosion of the fibular head (series 6, image 7). There is also edema within the lateral aspect of the patella at the retinaculum attachment which is more extensive than that seen on prior study.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: Extensor mechanisms is intact.ADDITIONAL
Large joint effusion with synovitis which appears to have progressed when compared with the prior study. Foci of bone marrow edema have also progressed with new small erosions. These findings suggest inflammatory arthritis.