HHLA2 and cancer: In cancers such as THYM, UVM, MESO, PRAD, COAD, READ, KICH, UCS, LGG, OV, KIRP, LIHC, BRCA, BRCA-LumA, BRCA-LumB, and SARC, ADM exhibited strong positive correlations with almost all immune-related genes, including BTLA, BTN2A1, CD160, CD200, CD200R1, CD209, CD226, CD244, CD276, CD28, CD40, CD48, CD86, CTLA4, PVR, TIGIT, TNFRSF18, TNFRSF9, TNFSF14, TNFSF18, CD27, CD274, CD70, CD96, ICOS, TNFRSF25, TNFRSF4, TNFSF9, TNFSF15, HHLA2, TNFRSF14, CD47, and PDCD1.