Some studies indicated an overexpression of GSTP1 gene in esophageal cancer (Joshi et al., 2005), colorectal cancer (Zhang et al., 2014), renal cancer (Kaprilian et al., 2015), lung cancer (Yang et al., 2006), and in BC (Chen et al., 2013; Pljesa‐Ercegovac et al., 2011; Savic‐Radojevic et al., 2007). This evidence concerns the gene GSTP1 and colorectal cancer.