HIF1A and head and neck squamous cell carcinoma: As OSCC is a subset of HNSCC, a much larger pool of viable research can be obtained, and due to etiological similarities between OSCC and other types of HNSCC, it is plausible to assume that establishing HIF-1α as a reliable prognostic indicator in HNSCC would imply its prognostic importance/effect in OSCC, as well.