Summary of visual inspections of vertebral lesions on CTa
| CT Appearanceb | ||||
|---|---|---|---|---|
| Grade 1 | Grade 2 | Grade 3 | Grade 4 | |
| HHBM (n = 8) | 8 | 0 | 0 | 0 |
| Bone metastasis (n = 24) | 1 | 17 | 5 | 1 |
↵a When the CT appearance was divided into 2 categories (grade 1 vs grades 2–4), HHBM and metastasis differed significantly (Fisher exact test, P < .01).
↵b CT appearance of each vertebral body lesion was classified using the 4-point grading system: grade 1, normal appearance with normal or subtle high attenuation; grade 2, osteolytic lesions; grade 3, osteoblastic lesions; and grade 4, mixed osteolytic and osteoblastic lesions.