| cSCC | Cutaneous squamous cell carcinoma |
| aCSCC | Advanced cutaneous squamous cell carcinoma |
| laCSCC | Locally advanced cutaneous squamous cell carcinoma |
| mCSCC | Metastatic cutaneous squamous cell carcinoma |
| PD-1 | Programmed cell death protein 1 |
| PD-L1 | Programmed cell death ligand 1 |
| ICI | Immune checkpoint inhibitor |
| RT | Radiotherapy |
| EGFR | Epidermal growth factor receptor |
| ORR | Overall response rate |
| PFS | Progression-free survival |
| OS | Overall survival |
| irAE | Immune-related adverse event |
| ECOG | Eastern Cooperative Oncology Group |
| AJCC | American Joint Committee on Cancer |
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