Figure 9b. Severe nonerosive arthritis of the second and third metacarpophalangeal joints in a 36-year-old woman. (a) Coronal contrast-enhanced fat-saturated T1-weighted MR image shows inflamed synovium. An area of hypoenhancement is seen within the enhancing and thickened synovial tissue (arrowheads), a finding consistent with hypovascular pannus. (b) Axial contrast-enhanced fat-saturated T1-weighted MR image shows the extent of the hypovascular pannus (*).