NRP1 and head and neck squamous cell carcinoma: In order to evaluate the role of NRP-1 in primary HNSCC tumors, the NRP-1 expression levels were assessed in a cohort of 172 HNSCC human samples selected from the archives of Pathology Unit of University “Federico II” of Naples, with a validated follow-up, by performing a tissue microarrays immunohistochemical analysis (TMA IHC).