Summary of visual assessments of vertebral lesions on MRIa
| T1WI | T2WI | Distribution Pattern | Appearance | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Hyper | Iso | Hypo | Hyper | Iso | Hypo | Diffuse | Patchy | Nodular | Homo | Hetero | |
| HHBM (n = 8) | 0 | 0 | 8 | 0 | 0 | 8 | 5 | 2 | 1 | 8 | 0 |
| Metastasis (n = 21) | 0 | 0 | 21 | 3 | 6 | 12 | 20 | 0 | 1 | 15 | 6 |
Note:—Hyper indicates hyperintensity; Iso, isointensity; Hypo, hypointensity; Homo, homogeneous; Hetero, heterogeneous.
↵a When the signal intensity was divided into 2 categories (hypointensity vs iso- to hyperintensity), there was no significant difference in the T1 signal intensity of the lesions between patients with HHBM and those with bone metastasis. On the other hand, there was a significant difference in the T2 signal intensity of the lesions between the 2 groups (Fisher exact test, P = .033). There was no significant difference in the distribution pattern and appearance of the lesions between patients with HHBM and those with bone metastasis.