According to the results of the analysis of the relationship between the NFKB1 −94ins/del ATTG promoter polymorphism and subtypes of cancer, the NFKB1 −94ins/del ATTG promoter polymorphism is a risk factor for oral squamous cell carcinoma, ovarian cancer and nasopharyngeal carcinoma. This evidence concerns the gene NFKB1 and nasopharyngeal carcinoma.