TNFRSF12A and cancer: Single-cell transcriptomic profiling revealed selective enrichment of TNFRSF12A expression in cancer-associated fibroblasts (CAFs), with its expression levels positively correlating with fibroblast infiltration density in the tumor microenvironment (McCluster algorithm: Cor = 0.316, p = 2.15 × 10−5; TIDE algorithm: Cor = 0.329, p = 9.12 × 10−6).