Table 3.
Patient Characteristics
| Characteristics | Median (Range) | No. (%) |
|---|---|---|
| Age (years) | 59 (23–81) | |
| KPS | 90 (70–100) | |
| 70–80 | 23 (47) | |
| 80–100 | 26 (55) | |
| RPA Class | ||
| 1 | 12 (24) | |
| 2 | 37 (76) | |
| Histology | ||
| NSCLC | 28 (57) | |
| Breast Cancer | 9 (18) | |
| GI Malignancies | 4 (8) | |
| Melanoma | 4 (8) | |
| Other | 4 (8) | |
| Controlled Primary | ||
| Yes | 32 (65) | |
| No | 17 (35) | |
| Extracranial Metastasis | ||
| Yes | 22 (45) | |
| No | 27 (55) | |
| Number of Lesion | ||
| 1 | 48 (98) | |
| 2 | 1 (2) | |
| Location of Lesion | ||
| Supratentorial | 41 (82) | |
| Infratentorial | 9 (8) | |
| Superficial Tumor with Dural/Pial Involvement | ||
| Yes | 32 (64) | |
| No | 18 (36) | |
| Tumor Maximal Dimension (cm) | 2.9 (1.0–5.2) | |
| ≥3.0 cm | 23 (46) | |
| <3.0 cm | 27 (54) | |
| Cavity Maximal Dimension (cm) | 2.8 (1.7–5.4) | |
| ≥3.0 cm | 18 (36) | |
| <3.0 cm | 32 (64) | |
| Resection Status | ||
| Gross total resection | 46 (92) | |
| Subtotal resection | 4 (8) | |
| Reason for not proceeding to SRS | ||
| Early CNS failure | 4 (8) | |
| General medical decline | 3 (6) | |
| Large surgical cavity size | 2 (4) | |
| Failure to follow up | 1 (2) | |
| Time from surgery to SRS (days) | 31 (7–56) | |
| Dose (cGy) | 1800 (1500–2200) | |
Abbreviations: CNS= central nervous system; KPS= Karnosfky Performance Status scale; NSCLC= non-small cell lung cancer; PTV= planning tumor volume; RPA= Recursive partitioning analysis; SRS= stereotactic radiosurgery.