Characteristics of γH2AX negative and positive DLBCL patients with respect to IPI score, p53 expression levels, cell of origin (GCB vs non-GCB), Bcl-2 expression, c-MYC expression, and DDR pathway activation (pCHK1/2, pCDC25c). This evidence concerns the gene TP53 and diffuse large B-cell lymphoma.