CD4 and prostate adenocarcinoma: We found that DBNDD1 gene expression was positively correlated with immune infiltration of B cells(r = 0.272, p = 1.79 × 10−8), purity (r = 0.204, p = 2.79 × 10−5), CD4+ effector memory T cells (r = 0.142, p = 3.77 × 10−3), CD4+ type 1 helper T cells (r = 0.198, p = 4.98 × 10−5), M2 macrophages (r = 0.118, p = 1.65 × 10−2), and myeloid-derived suppressor cells (r = 0.197, p = 5.28 × 10−5), mast cells (r = 0.212, p = 1.25 × 10−5), and neutrophils (r = 0.108, p = 2.08 × 10−2) in PRAD (Figure 9A).