CD4 and posterior cortical atrophy: Results showed that the PCa tissue in FRGPI-high subgroup was infiltrated by a higher fraction of M2 macrophages, T cells regulatory (Tregs), T follicular helper cells (Tfh), and memory B cells, but a lower fraction of resting memory CD4 T cells, resting mast cells, monocytes, and neutrophils (Figure 7C).