Analysis of HPV and Biomarkers Present in the Biological Fluids of Patients Suffering From Head and Neck Cancer as a Non-invasive Strategy for Detecting Recurrence

"For tissue collection, tumor and surrounding tissues will be used healthy specimens taken during surgical removal, according to clinical practice. Blood and saliva sampling will be carried out at different times:~i) the day before surgery; ii) the day after surgery (only for blood); iii) at the time of patient discharge (approximately 15 days after surgery); iii) during the check-up visit scheduled to monitor the follow-up (FU)"