| Patients | 48 |
| Lesions | 54 |
| Median overall survival from surgery (months) | 20.2 |
| Median age at surgery (years) | 63.5 |
| Median time from STI to surgery (months) | 12 |
| Gender |
| Male | 32 (66.7) |
| Female | 16 (33.3) |
| Primary cancer |
| Lung | 31 (64.6) |
| Breast | 9 (18.8) |
| Others | 8 (16.6) |
| Location |
| Supratentrial | 47 (87) |
| Infratentrial | 7 (13) |
| Neurological deficit |
| Yes | 36 (67) |
| No | 18 (33) |
| RPA classification at surgery |
| Class1 | 7 (13) |
| Class2 | 18 (33) |
| Class3 | 29 (53) |
| Radiotherapy before salvage surgery |
| STI | 46 (85) |
| SRS | 24 (44.5) |
| SRT | 17 (31.5) |
| Repeated STI | 5 (9) |
| WBRT+STI | 8 (15) |
| Surgical method |
| Minimum resection | 26 (48) |
| with radiotherapy | 12 (22) |
| without radiotherapy | 14 (26) |
| Resection with free margine | 28 (52) |
| Pathological diagnosis |
| Tumor recurrence + Necrosis | 47 (87) |
| Radiation necrosis alone | 7 (13) |
| Extent of resection |
| Gross total removal | 48 (89) |
| Subtotal removal | 6 (11) |
| KPS before surgery |
| 90–100 | 18 (33) |
| 70–80 | 5 (9) |
| 50–60 | 20 (37) |
| 30–40 | 11 (20) |
| 0–20 | 0 (0) |
| KPS after surgery |
| 90–100 | 24 (44) |
| 70–80 | 16 (30) |
| 50–60 | 10 (18.5) |
| 30–40 | 3 (5.5) |
| 0–20 | 1 (2) |
| Radiotherapy after salvage surgery |
| Yes | 20 (38) |
| WBRT | 10 (18.5) |
| STI | 10 (18.5) |
| No | 34 (62) |
| Treatment period |
| 2002–2010 | 19 (40) |
| 2011–2019 | 29 (60) |
