EGFR and head and neck squamous cell carcinoma: Since gene expression-based molecular subtypes have been shown to be enriched with some genomic alterations, such as EGFR amplification and HRAS-CASP8 co-mutations in the classical and basal subtypes, respectively [25, 26], we then tested the association of the RadR score with genomic instability and known recurrent genomics alterations in HNSCC.