SATB1 and PML staining results in EBV+ cHL. A) SATB1 percentages in EBV+ cHL cases with negative, normal or strong HLA class I staining pattern differ significantly (p=0.0412, Kruskal-Wallis test). Dunn's multiple comparison test indicated a significant difference specifically between the HLA class I normal and strong staining groups (P<0.05). B) The number of cases with >10 PML-NBs significantly increases with HLA class I staining intensity from negative, to normal and strong (p=0.0011, Chi-square test).