B-cell infiltration is associated with survival outcomes following programmed cell death protein 1 inhibition in head and neck squamous cell carcinoma
Programmed cell death protein 1(PD-1) axis blockade has become the mainstay in the treatment of recurrent and/or metastatic (R/M) head and neck squamous cell cancer (HNSCC). PD-L1 is the only approved biomarker for patient selection; however, response rate is limited even among high expressors. Our primary objective was to investigate the association of immune-cell-related biomarkers in the tumor and tumor microenvironment with PD-1 checkpoint inhibitors’ outcomes in patients with R/M HNSCC.