We also found that RiskScore was positively linked to nine immune checkpoint genes, comprising CD244, CD27, CTLA4, IDO2, LAG3, LAIR1, PDCD1, PDCD1LG2, and TIGIT, which demonstrated that STAD patients with higher RiskScore may have stronger immune evasion ability [54]. The gene discussed is PDCD1LG2; the disease is gastric adenocarcinoma.