| SRS | stereotactic radiosurgery |
| PD-1 | programmed death 1 |
| MM | malignant melanoma |
| BM | brain metastases |
| PD-L1 | programmed death ligand 1 |
| PsP | pseudoprogression |
| ECOG | Eastern Cooperative Oncology Group performance status |
| cMRI | cranial magnetic resonance imaging |
| CTCAE | Common Terminology Criteria for Adverse Events |
| CT | computed tomography |
| GTV | gross tumor volume |
| OAR | organs at risk |
| ICP | intracranial pressure |