MKI67 and Epstein-Barr virus infection: There was no significant difference in the expression of CD5 (P=0.641), SOX11 (P=0.17), CD10 (P>0.999), BCL-6 (P=0.396), and Ki-67 (P=0.707), with 30% as the threshold between MCL patients with and without EBV infection.