No association was observed between the laboratory parameters (blast, basophils, and WBC count) and the CAT C262T, GPX1 Pro198Leu, MnSOD Ala16Val, GSTM1, GSTT1, and GSTP1 variant genotypes in CML cases. The gene discussed is GSTM1; the disease is chronic myelogenous leukemia, BCR-ABL1 positive.