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Radiation technique and secondary brain tumor, n (%).
| Radiation Technique | Neuroepithelial Tumor | Meningioma | Sarcoma | Total |
|---|---|---|---|---|
| Lateral opposing field | 10 (20.8) | 4 (10.8) | 9 (17.3) | 23 (16.7) |
| 3 or 4 field technique | 9 (18.7) | 5 (13.5) | 13 (25.0) | 27 (19.6) |
| Rotational technique | 2 (4.1) | 6 (16.2) | 2 (3.8) | 10 (7.2) |
| SRS | 1 (2.0) | 2 (5.4) | 3 (5.7) | 6 (4.3) |
| N.D. | 26 (54.1) | 20 (54.0) | 25 (48.0) | 71 (51.8) |
| Total | 48 | 37 | 52 | 137 |
N.D.: not determined; SRS: stereotactic radiosurgery.
