Focussing on CD8+ T memory follicular cells (CD45RA− CD69+ CXCR5+ PD1+), we observed substantial co‐expression of FoxP3 and the induced‐Treg marker IKZF337 in both DLBCL and FL samples (Figure 4g). Here, CXCR5 is linked to diffuse large B-cell lymphoma.