SULT1A1*2 isoform is associated with increased risks of lung (Pachouri et al., 2006; Liao et al., 2012), stomach cancer (Liang et al., 2004; Boccia et al., 2005), urothelial cancer (Roupret et al., 2007), and breast cancer (Lee et al., 2012). Here, SULT1A1 is linked to gastric cancer.