All the following are features of Ankylosing Spondylitis except:
|D||Squaring of the vertebral bodies|
a. Vertebral chondritis and adjacent subchondral osteitis followed by fibrosis and ossification lead to bony bridging of adjacent vertebrae (syndesmophytes).
b. The advanced radiographic appearance of the ossification process of AS is aptly named bamboo spine. The Romans sign is an erosion surrounded by sclerosis at a vertebral body margin.
c. Periostitis of the periphery of the vertebral body leads to early squaring of vertebral bodies