We used reverse transcription polymerase chain reaction to evaluate the expression of EVI1 and GR6, and particularly of the fusion genes RPN1-EVI1 and GR6-EVI1 in 9 AML patients with either inv(3)(q21q26) (7 cases) or t(3;3)(q21;q26) (2 cases).     ///    "EVI1 expression might occur either as a consequence of rearrangements leading to the formation of different fusion transcripts, such as RPN1-EVI1 and RPN1-DEVI1 or following disruption of the PR activation domain of the MDS1-EVI1 gene.. "    ///    Association of 3q21q26 syndrome with different RPN1/EVI1 fusion transcripts..     ///    "EVI1 and GR6 were always expressed, as was RPN1-EVI1. "