Oropharyngeal squamous cell carcinoma (OPSCC) refers to squamous cell cancers that develop in the posterior third of the tongue, tonsils, soft palate and posterior pharyngeal wall. The epithelial-mesenchymal transition (EMT) is a biological process that allows a polarized epithelial cell, which normally interacts with the basal membrane via the basal surface, to undergo biochemical, molecular and morphological changes, which culminate in the acquisition...