Using multiplex reverse transcriptase-polymerase chain reaction analysis, we detected a cryptic SET-NUP214 rearrangement in our patient.     ///    Further studies are necessary to evaluate the incidence of SET-NUP214 rearrangement in T-ALL patients and the treatment responses as well as prognosis of these patients..     ///    T-cell acute lymphoblastic leukemia associated with complex karyotype and SET-NUP214 rearrangement: a case study and review of the literature..     ///    " SET-NUP214 rearrangements have been rarely reported in T-cell acute lymphoblastic leukemia (T-ALL), acute undifferentiated leukemia, and acute myeloid leukemia, and most documented cases have been associated with normal karyotypes in conventional cytogenetic analyses. "    ///    "Here, we describe a novel case of T-ALL associated with a mediastinal mass and a SET-NUP214 rearrangement, which was masked by a complex karyotype at the time of initial diagnosis. "    ///    "As only 11 cases (including the present study) of T-ALL with SET-NUP214 rearrangement have been reported, the clinical features and treatment outcomes have not been fully determined. "