Association of GSTT1 and GSTM1 deletions with esophageal and cervical cancer susceptibility is supported by data obtained by studying populations from India, Korea, Turkey, Great Britain, Italy, USA, and other countries (Ketterer et al., 2007; Gao et al., 2011; Zhang et al., 2012). This evidence concerns the gene GSTM1 and cervical carcinoma.