Heterogeneous patterns of amplification of the NUP214-ABL1 fusion gene in T-cell acute lymphoblastic leukemia..     ///     Episomes with the NUP214-ABL1 fusion gene have been observed in 6% of T-ALL.     ///    One case showed insertion of apparently non-amplified NUP214-ABL1 sequences at 14q12.     ///    The amplified sequences were analyzed using array-based CGH.These findings confirm that the NUP214-ABL1 gene requires amplification for oncogenicity.     ///    Fluorescent in situ hybridization revealed a heterogeneous pattern of NUP214-ABL1 amplification. 