Occurrence of human leukocyte antigen B51-related ankylosing spondylitis in a family: Two case reports

Figure 1 Radiographic images of the father (case 1) and the daughter (case 2) with ankylosing spondylitis. A: Sacroiliac joint of the father showing complete ankyloses; B: Lumbar spine imaging of the father in the shape of “bamboo spine”; C: Computed tomography image of the sacroiliac joint of the daughter showing multiple definite erosions with sclerotic changes on both sacroiliac joints; D: Magnetic resonance image of the lumbar spine of the daughter revealing fat deposition at the corners of the lumbar spine, probably due to ankylosing spondylitis.