There was a positive correlation between levels of sIL-2R and number of CD68-positive macrophages in extranodal DLBCL (ρ = 0.5891, p-value = 0.0039), but not in nodal DLBCL (ρ = 0.09, p-value = 0.6167) (Figure 5H). Here, CD68 is linked to diffuse large B-cell lymphoma.