PTGER4 is overexpressed and proposed as a therapeutic target for LUAD and other cancers (Doherty et al., 2009; Fulton, Ma & Kundu, 2006; Heinrichs et al., 2018; Kim et al., 2010; Ma et al., 2006; Xin et al., 2012). The gene discussed is PTGER4; the disease is cancer.