Table 4.
Top 20 co-occurrence keywords on research of immunotherapy for brain metastasis.
| Rank | Keywords | Occurrences | TLS | Rank | Keywords | Occurrences | TLS |
|---|---|---|---|---|---|---|---|
| 1 | Immunotherapy | 742 | 1450 | 11 | Pembrolizumab | 87 | 232 |
| 2 | Brain Metastases | 358 | 770 | 12 | Lung Cancer | 81 | 182 |
| 3 | Melanoma | 348 | 706 | 13 | Ipilimumab | 78 | 234 |
| 4 | Brain Metastasis | 200 | 420 | 14 | Metastasis | 77 | 119 |
| 5 | Radiotherapy | 149 | 352 | 15 | Chemotherapy | 73 | 172 |
| 6 | Targeted Therapy | 132 | 315 | 16 | Immune Checkpoint Inhibitor | 72 | 125 |
| 7 | Non-Small Cell Lung Cancer | 122 | 241 | 17 | NSCLC | 72 | 140 |
| 8 | Immune Checkpoint Inhibitors | 112 | 223 | 18 | PD-L1 | 65 | 160 |
| 9 | Stereotactic Radiosurgery | 112 | 292 | 19 | PD-1 | 58 | 172 |
| 10 | Nivolumab | 98 | 272 | 20 | Tumor Microenvironment | 57 | 84 |
TLS, Total Link Strength.