cfDNA	Cell-free DNA
CNI	Copy number instability
CSC	Cancer stem cells
CT scan	Computed-tomography scanner
CTLA-4	Cytotoxic T-lymphocyte-associated antigen 4
ECOG	Eastern cooperative oncology group
Fc	Crystallizable fragment
FcR	Crystallizable fragment receptor
HNSCC	Head and neck squamous cell carcinoma
ICI	Immune checkpoint inhibitor
iRECIST	Immune response-evaluation criteria in solid tumors
irRC	Immune-related response criteria
irRECIST	Immune-related response-evaluation criteria in solid tumors
NGS	Next-generation sequencing
NSCLC	Non-small-cell lung cancer
OS	Overall survival
PD-1	Programmed cell death protein 1
PD-L1	Programmed cell death ligand 1
PD-L2	Programmed cell death ligand 2
RECIST	Response-evaluation criteria in solid tumors
TAM	Tumor-associated macrophage
TGK	Tumor growth kinetics
TGR	Tumor growth rate
TILs	Tumor-infiltrating T lymphocytes
Tregs	Regulatory T-cells
TTF	Time to treatment failure
uPD	Unconfirmed progressive disease