CDH1 and head and neck squamous cell carcinoma: Furthermore, the E-cadherin levels detected in EVs from HPV-16 positive HNSCC lines UM-SCC-47, UM-SCC-104, and UPCI:SCC152 were overall lower than those in EVs from HPV-negative or HPV18-positive UM-SCC-17A, UM-SCC-105, and UM-SCC-92.