Table 3.
Pretreatment Characteristics: Cerebral Metastasis
| Variable | No. of Patients | % |
|---|---|---|
| Total | 1048 | 100.0 |
| Number of brain metastases | ||
| • 1 | 541 | 51.6 |
| • 2 | 191 | 18.2 |
| • 3 | 93 | 8.9 |
| • 4 | 41 | 3.9 |
| • ≥ 5 | 162 | 15.5 |
| • LMD | 3 | < 0.3 |
| • NA | 17 | 1.6 |
| Sentinel location of lesions | ||
| • Frontal lobe | 406 | 38.7 |
| • Temporal lobe | 79 | 7.5 |
| • Parietal lobe | 153 | 14.6 |
| • Occipital lobe | 96 | 9.2 |
| • Cerebellum | 203 | 19.4 |
| • Brainstem | 22 | 2.1 |
| • Durally based | 15 | 1.4 |
| • Other | 49 | 4.7 |
| Size of sentinel metastasis, mm | ||
| • ≤ 30 | 637 | 60.7 |
| • > 30 | 292 | 27.9 |
| • NA | 119 | 11.4 |
| Cranial imaging | ||
| • CT head | 635 | 60.6 |
| • MRI head | 873 | 83.3 |
| • NA | 13 | 1.2 |
| Reason MRI not undertaken | ||
| • Contraindicated | 17 | 9.7 |
| • Patient unwilling | 3 | 1.7 |
| • Indicated but not performed before MDT | 91 | 52.0 |
| • No clinical indication | 48 | 27.4 |
| • NA | 16 | 9.1 |
| MRI sequences | ||
| • Gadolinium contrast | 836 | 95.8 |
| • Navigation sequence | 378 | 43.3 |
| • DTI | 668 | 76.5 |
| • DWI | 66 | 7.6 |
| • Spectroscopy | 3 | 0.3 |
| Prior brain surgery | ||
| • Yes | 154 | 14.7 |
| • No | 891 | 85.0 |
| • NA | 3 | < 0.3 |
Abbreviations: DTI, diffusion tensor imaging; DWI, diffusion-weighted imaging; LDM, leptomeningeal disease MDT, multidisciplinary team meeting; NA, not available (unknown or not recorded).