Moreover, Bi et al. reported that PD-L1 expression was positively related to latent membrane protein 1 (LMP1) expression in natural killer/T-cell lymphoma (NKTCL), which was probably mediated by the MAPK/NF-κB pathway and correlated with poor prognosis in NKTCL 20. The gene discussed is NFKB1; the disease is extranodal nasal NK/T cell lymphoma.