DEK and acute myeloid leukemia: The balanced translocation t(6;9)(p23;q34), with the fusion gene DEK/NUP214 as marker, is related with leukemias with or without monocytic features and is often associated with basophilia and multilineage dysplasia; mainly it relates to AML with maturation (FAB subtype M2) and LMA myelomonocytic (FAB subtype M4) but may occur in some other phenotypes.