Most studies to date have focused on OLFM4, which has been associated with some of the most prevalent malignancies, including gastric cancer (Oue et al., 2009; Luo et al., 2011; Yu et al., 2011a; Liu et al., 2012), pancreatic cancer (Kobayashi et al., 2007; Chen et al., 2011), colon, lung and breast cancer, colorectal adenomas and liver metastases of colorectal origin (Seko et al., 2010; Besson et al., 2011; Sentani et al., 2013), endometriosis (Dassen et al., 2010), and cervical cancer (Yu et al., 2011b). The gene discussed is OLFM4; the disease is gastric cancer.