NT5E and head and neck squamous cell carcinoma: We have therefore re-addressed correlations of CD73 with parameters of interest and clinical endpoints in the HPV-negative TCGA-HNSCC (n = 415), the Fred Hutchinson Cancer Research (FHCRC) cohort of HPV-negative OSCC (n = 97; GSE41613), and HPV-negative HNSCC from the GSE65858 cohort (n = 196).