An immune signature consisting of BCL3, CCL2, CCL3, CCL4L1, CCL4L2, CCL7, CD83, CTSL1, CXCL2, CXCL3, DEFA1, DUSP4, EREG, GNL1, GPR183, HBEGF, IL10, IL1R1, IL1R2, IL1RAP, IL6, IL8, IRS2, JUN, NFIL3, NFKBIA, NLRP3, OASL, OSM, PDCD1, PELI1, PIK3R1, PNP, PTGER4, RGCC, RGS1, RIPK2, SEMA7A, THBS1, TNFAIP3, ULBP2 and VEGFA, was enriched (p = 2.6 × 10−11) in PBMCs from CRC. The gene discussed is PDCD1; the disease is colorectal carcinoma.