PSMB9 and nasopharyngeal carcinoma: Among the latent genes products, LMP-1 (Latent membrane protein-1) and LMP-2 (Latent membrane protein-2) are consistently expressed in subset of NPC tumors, therefore, they display useful oncogenic targets of NPC diagnosis (Brooks et al., 1992; Hao et al., 2004; See et al., 2008; Lao et al., 2017). LMP-1 encoded its latent membrane protein that induce morphological and phenotypic alterations in epithelial cells (Hao et al., 2004; Kang, Kieff, 2015; Dawson et al., 2012).