Mutations in DDX3X have also been discovered in aggressive natural killer-cell leukaemia (ANKL), a rare mature NK-cell tumour [110]; Burkitt lymphoma (BL) [161]; and Burkitt-like lymphoma with 11q aberration (BLL-11q), a category similar to Burkitt lymphoma but lacking the MYC rearrangement and containing 11q arm distortion [111]. This evidence concerns the gene DDX3X and aggressive NK-cell leukemia.