MR Features of the Cavernous Angiomas (n = 29)
| MR features | MR Sign of T1 Hyperintense Perilesional Signal | P | |
|---|---|---|---|
| Positive (n = 18) | Negative (n = 11) | ||
| Volume of vasogenic edema, cm3 | 32.3 ± 22.0 | 12.4 ± 9.6 | .009 |
| Volume of mass, cm3 | 12.3 ± 7.6 | 9.1 ± 5.5 | .220 |
| Presence of enhancement* | 9 | 3 | .248 |
| Time interval between symptom onset and MR imaging, d | 10.4 ± 9.7 | 18.3 ± 11.2 | .060 |
| Location | |||
| Cerebral hemisphere | 16 | 5 | |
| Cerebellar hemispheres | 1 | 3 | |
| Brain stem | 1 | 3 | |
Note:—Volumes of masses and edemas are mean ± SD.
* Enhanced T1-weighted images were not available in 2 patients with positive MR signs of a T1 hyperintense perilesional signal and in 1 patient with no MR sign.