SCC	Squamous cell carcinoma
LPC	Lysophosphatidylcholine
WGCNA	Weighted gene correlation network analysis
OS	Overall survival
GPS	Glasgow prognostic score
CONUT	Controlling nutritional status
HR	Hazard ratio
CI	Confidence interval
PS	Performance status
PC	Phosphatidylcholine
CE	Cholesteryl ester
HC	Healthy cohort
ICI	Immune checkpoint inhibitor
PFS	Progression-free survival
CRP	C-reactive protein
LDL	Low-density lipoprotein
HDL	High-density lipoprotein
LPA	Lysophosphatidic acid
irAE	Immune-related adverse events