Other fusion genes are PCM1-JAK2 in acute myeloid leukemia, in atypical chronic myeloid leukemia and T-cell precursor acute lymphoblastic leukemia (TPALL), ETV6-JAK2 in acute lymphoblastic leukemia (ALL) and in chronic myeloid leukemia (CML) and BCR-JAK2 in atypical chronic myeloid leukemia (aCML) [31]. Here, JAK2 is linked to atypical chronic myeloid leukemia, BCR-ABL1 negative.