| dMMR | Mismatch Repair Deficient |
| ICI | Immune Checkpoint Inhibitor |
| MCC | Merkel Cell Carcinoma |
| MCPyV | Merkel Cell Polyomavirus |
| MMR | Mismatch Repair |
| MSI-H | Microsatellite Instability High |
| MSS | Microsatellite Stable |
| NGS | Next-Generation Sequencing |
| NK | Natural Killer |
| ORR | Objective Response Rate |
| PD-L1 | Programmed Cell Death Ligand 1 (PD-L1) |
| rwOS | Real-World Overall Survival |
| TIS | T-Cell Inflammation Scores |
| TMB | Tumor Mutational Burden |
| UVR | Ultraviolet Radiation |
| VN-MCC | Merkel Cell Polyomavirus-Negative Merkel Cell Carcinoma |
| VP-MCC | Merkel Cell Polyomavirus-Positive Merkel Cell Carcinoma |
| WES | Whole Exome Sequencing |
| WTS | Whole Transcriptome Sequencing |