Kaplan-Meier univariate 5-year survival analysis in pharyngeal squamous cell carcinoma. In the EMT- group both TWIST and SNAI1 were negative and in EMT+ group both transcription factors were positive. In group others, both or either TWIST or SNAI1 were expressed in tumor stroma. Absence of TWIST and SNAI1 expression in tumor stroma predicted better DSS and OS A). Survival was poorer when one or both transcription factors were positive in tumor stroma B).