Figure 4From: Whole body MR imaging in ankylosing spondylitis: a descriptive pilot study in patients with suspected early and active confirmed ankylosing spondylitis47-year old male patient with confirmed AS (duration of inflammatory back pain 13 years, BASDAI 7.0, HLA B27 positive). Fatty replacement of subchondral bone marrow is shown in the lower sacral quadrant (arrows) on the coronal T1-weighted image.Back to article page