Table 1.
Lesion-Based Characteristics and Margin Assessment
| All Lesions | Number and Percentage of Lesions Requiring >1-mm Margin to Cover Disease Extent at Time of Treatment | |||
|---|---|---|---|---|
| N | % | N | % | |
| Location of the lesion | ||||
| Frontal lobe | 181 | 34.1 | 59 | 40.1 |
| Temporal lobe | 96 | 18.0 | 26 | 17.7 |
| Cerebellum | 91 | 17.1 | 20 | 13.6 |
| Occipital lobe | 76 | 14.3 | 23 | 15.6 |
| Parietal lobe | 66 | 12.4 | 16 | 10.9 |
| Brainstem | 21 | 4.1 | 3 | 2.0 |
| Concurrent systemic therapy | ||||
| Yes | 95 | 17.9 | 16 | 10.9 |
| No | 436 | 82.1 | 131 | 89.1 |
| Corticosteroids | ||||
| Yes | 243 | 45.7 | 83 | 56.5 |
| No | 288 | 54.3 | 64 | 43.5 |
| Histology of primary lesion | ||||
| Lung cancer | 256 | 48.2 | 73 | 49.7 |
| Malign melanoma | 26 | 4.9 | 11 | 7.5 |
| Breast cancer | 181 | 34.1 | 44 | 29.9 |
| Colorectal cancer | 23 | 4.3 | 0 | 0.0 |
| Other | 45 | 8.5 | 19 | 12.9 |
| Total | 531 | 100 | 147 | 100 |