Lumbar spine involvement
Ankylosing spondylitis | Enteropathic spondylitis | Psoriatic spondylitis | Reactive arthritis | |
---|---|---|---|---|
Number of films available (no of cases) | 78/91 | 25/31 | 28/34 | 5/7 |
Worst grade (number (%)) grades 3–4 | 43 (55) | 10 (40) | 7 (25) | 1 (20) |
Number (%) symmetry4-150 | 38/52 (73) | 8/16 (50) | 4/14 (29) | 2/3 (67) |
Paravertebral ossification (number (%)) | 1 (1) | 1 (4) | 1 (4) | 0 |
Chunky syndesmophytes (number (%))4-150 | 12/52 (23) | 3/16 (19) | 5/14 (36) | 1/3 (33) |
Ligamentous calcification (number (%)) | 11 (14) | 1 (4) | 1 (4) | 0 |
Squaring (number (%)) | 15 (19) | 1 (4) | 1 (4) | 0 |
Romanus lesion (number (%)) | 17 (22) | 0 | 4 (14) | 3 (60) |
Spinal pseudarthrosis (number (%)) | 2 (3) | 0 | 1 (4) | 0 |
Zygoapophyseal ankylosis (number (%)) | 16 (21) | 4 (16) | 0 | 0 |
Discitis (number (%)) | 5 (6) | 2 (8) | 1 (4) | 0 |
Bamboo spine (number (%)) | 9 (12) | 3 (12) | 0 | 0 |
↵4-150 Note data on symmetry and syndesmophyte morphology only apply to severity grades 2–4: the number of available films is given by the denominator.