In a series of 145 consecutive un-selected adult patients with AML we simultaneously analyzed the presence of 4 genetic abnormalities, PML/RARalpha for t(15;17), AML1/ETO for t(8;21), CBFbeta/MYH11 for inv(16)/t(16;16) and rearrangements of the MLL gene for 11q23 abnormalities.     ///    "The AML1/ETO fusion transcript was detected in only 2 cases (1.4%) both with M2 morphology, but 29 other cases with M2 morphology were negative. "