Figure 6

30-year old male patient with confirmed AS (duration of inflammatory back pain 7 years, BASDAI 4.8, HLA B27 positive). Two coronal STIR images demonstrate inflammatory lesions in the thoracic spine (solid arrows), in the sacroiliac joint (sacral side) (open arrows), and in the left hip. Extensive bone marrow changes in the acetabulum (curved arrow) and an effusion of the hip joint are shown (arrowheads).