It has been found in nasopharyngeal carcinoma that nasopharyngeal carcinoma cell lines surviving radiation treatment show decreased E-cadherin and increased vimentin, resulting in EMT occurrence with strong migration activity.6 It has also been demonstrated in other head and neck squamous cancer cell lines that X-ray radiation can promote EMT and enhance migration and invasion.97 This evidence concerns the gene VIM and nasopharyngeal carcinoma.