The expression of HIF-1α is highly correlated with malignant phenotype and decreased survival in gastric cancer, like several other cancers (Hui et al., 2002; Branco-Price et al., 2012; Kitajima and Miyazaki, 2013; Kim et al., 2015; Miao et al., 2017). The gene discussed is HIF1A; the disease is gastric cancer.