Table 5.
Top 20 co-occurrence keywords involved in the research of PCa immunotherapy.
| Rank | Keywords | Frequency | TLS | Rank | Keywords | Frequency | TLS |
|---|---|---|---|---|---|---|---|
| 1 | immunotherapy | 1,103 | 5,247 | 11 | pd-l1 | 80 | 556 |
| 2 | prostate cancer | 954 | 4,297 | 12 | tumor microenvironment | 80 | 440 |
| 3 | cancer | 271 | 1,330 | 13 | immune checkpoint inhibitors | 78 | 414 |
| 4 | dendritic cell | 241 | 1,192 | 14 | castration-resistant prostate cancer | 76 | 351 |
| 5 | vaccines | 210 | 1,061 | 15 | radiotherapy | 75 | 403 |
| 6 | cancer vaccine | 191 | 1,016 | 16 | sipuleucel-t | 75 | 454 |
| 7 | cancer immunotherapy | 123 | 629 | 17 | t cells | 75 | 342 |
| 8 | chemotherapy | 91 | 534 | 18 | prostate-specific antigen | 73 | 524 |
| 9 | clinical trials | 85 | 515 | 19 | ctla-4 | 66 | 403 |
| 10 | metastasis | 80 | 426 | 20 | pd-1 | 62 | 530 |
TLS, total link strength.