BMI1 and nasopharyngeal carcinoma: To investigate whether there are mutations of IRES1 and IRES2 in the Bmi1 5′UTR, the RNA-seq data from 113 patients with NPC (GSE102349, https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE102349) were analyzed for the mutation of IRES2 in the Bmi1 5′-UTR.