CD274 and head and neck squamous cell carcinoma: Our team sought to find out if patients diagnosed with unresectable, LA HNSCC at a Portuguese Oncology Centre, had information regarding PD-L1 and CPS status at the moment of diagnosis, and if so, how did this correlate to the characteristics of the disease and the patient, and if there was any impact in prognosis, through the analysis of recurrence-free survival (RFS).