BCR and chronic myelogenous leukemia, BCR-ABL1 positive: Similar to AML, chronic myeloid leukemia cases with BCR-ABL translocations had unmethylated WT1 promoters and AWT1 hypermethylation, however, polycythaemia vera and essential thrombocythaemia samples had methylation profiles indistinguishable from normal leukocyte controls.