SACROILIAC
JOINT ON CT IMAGING IN JUVENILE ANKYLOSING SPONDYLITIS
Duan
Xiaomin, Sun Guoqiang
Radiological
Department, Beijing Children’s Hospital, Capital Medical University,
Beijing, China
Objective: To summarize characteristics of sacroiliitis on CT imaging in
young patients with ankylosing spondylitis.
Methods:
42 JAS patents were recruited and CT imaging of sacroiliac joint was
completed after diagnose. Another fifteen healthy volunteers underwent the
CT imaging.
Results:
CT imaging of joint space was normal, widened and irregularly widened and
narrowed no ankylosis. The changes of sacroiliac joint include bony
cortical uncontinuous, thicken and thin, subchondral sclerosis,
decalcification, erosion and cystic change.
Conclusion: In this group patients the changes of SI joints showed grade 0
to sacroilitis, no grade IV: In grade 0, the CT show was normal; In grade
I, the CT chanfes were suspicious in which joints surface were obscure and
cortical continues were not good; In grade II: There were irregular of
joints surface, thin or thicken in cortex, subchondral little cystic
changes, focal sclerosis and decalcification, but the joints space were
preserved. In grade III, There were out of shape in joint space include
widened and narrowed, but no ankylosis. Subchondral changes include cystic
change, extensive bony erosion, decalcification and sclerosis.