Here, we report the investigation of a cryptic rearrangement leading to MLL-MLLT3 transcript formation.     ///    The presence of the MLL-MLLT3 transcript is consistent with the clinical findings in this patient..     ///    Cryptic insertion of MLL gene into 9p22 leads to MLL-MLLT3 (AF9) fusion in a case of acute myelogenous leukemia.. 