In contrast to our data, one study that analyzed the expression of 109 genes associated with NF-kB pathways in 62 PTCL patients identified two different subgroups of PTCL, and the subgroup presenting up-regulated NF-kB genes was associated with better OS [20]. The gene discussed is NFKB1; the disease is mature T-cell and NK-cell non-Hodgkin lymphoma.