Somatic eGenes, where the lead eQTL was somatic, included important gastric cancer oncogenes, such as KRAS, CCDN1, and CCND2 among others45, genes involved in antigen generation, processing, or presentation (e.g., APOBEC3B, CANX, CTSS), and cytokines/chemokines or other key immune regulators (e.g., STAT1, CXCL5, CXCL9, TNFRSF9). The gene discussed is CTSS; the disease is gastric cancer.