Similar results were obtained in CML cases with three, four, and five variant genotypes from all the combined CAT C262T, GPX1 Pro198Leu, MnSOD Ala16Val, GSTM1, GSTT1, and GSTP1 polymorphisms. The gene discussed is GSTM1; the disease is chronic myelogenous leukemia, BCR-ABL1 positive.