RASSF1 and nasopharyngeal carcinoma: In the study of nasopharyngeal carcinoma, it is found that the RAS association domain family 1A (RASSF1A) gene and disheveled-associated binding antagonist of β-catenin 2 (DACT2) promoter methylation can be used as markers for early auxiliary diagnosis (Ye et al., 2017; Zhang et al., 2018).