Some scholars believe that CD23 can be produced in nasopharyngeal cancer tissue infected by EBV, the main mechanism is that the nuclear antigen of EBV nuclear antigen II, which is produced during EBV incubation period, is a necessity of B lymphocyte’s transformation, during which c-myc gene is regulated and CD23 is produced (14). This evidence concerns the gene FCER2 and nasopharyngeal carcinoma.