The presence of specific MR imaging findings at baseline and follow-up MR imaging
| MR Imaging Findings | Baseline (n = 33) | Follow-Up (n = 33)* | P† |
|---|---|---|---|
| ≥1 level involved | 3 (9) | 4 (12) | 1 |
| Disk space enhancement | 22 (67) | 25/32 (78) | .29 |
| T2 disk space abnormality | 29 (88) | 24 (73) | .13 |
| Epidural enhancement | 29 (88) | 19/32 (59) | .008 |
| Canal abscess | 17 (52) | 3/32 (9) | .001 |
| Canal compromise (%) | |||
| >25% | 19 (58) | 10/32 (31) | .008 |
| >50% | 7 (21) | 3/32 (9) | .22 |
| Paraspinal abscess | 7 (21) | 5/32 (16) | 1 |
| Paraspinal inflammation | |||
| None | 12 (36) | 12/32 (38) | |
| Mild | 18 (55) | 17/32 (53) | .75 |
| Moderate | 2 (6) | 3/32 (9) | |
| Severe | 1 (3) | 0 | |
| Vertebral body enhancement | |||
| None | 1 (3) | 2 (6) | |
| 1%–33% | 5 (15) | 5 (15) | 1 |
| 34%–66% | 7 (21) | 4 (12) | |
| >66% | 20 (61) | 22 (66) | |
| Vertebral marrow edema | |||
| None | 1 (3) | 1 (3) | .80 |
| 1%–33% | 3 (9) | 5 (15) | |
| 34%–66% | 10 (30) | 4 (12) | |
| >66% | 19 (58) | 23 (70) | |
| Vertebral body loss of height | |||
| None | 19 (53) | 7 (21) | |
| 1%–33% | 10 (30) | 18 (55) | <.001 |
| 34%–66% | 3 (9) | 2 (6) | |
| >66% | 1 (3) | 6 (18) |
Note:—Values represent No. (%) unless otherwise indicated.
* One patient did not receive contrast on the follow-up MR imaging, thereby limiting the evaluation of epidural, paraspinal, and disk space enhancement.
† Baseline MRI vs follow-up MRI.