CD274 and head and neck squamous cell carcinoma: Finally, we compared the predictive prognostic ability of composite score with IRGPI, m6A risk score, TIS, TIDE, IFNG, MSI, Merck18, CD274, CD8, Dysfunction, Exclusion, MDSC, CAF, and TAM (M2) scores on the HNSCC cohort in TCGA.