- Favorable risk cytogenetic abnormalities as defined by SWOG criteria (http://www.bloodjournal.org/cgi/content/abstract/96/13/4075) that include: inv(16)/t(16;16)/del(16q), t(15;17) with/without secondary aberrations, t(8;21) lacking del(9q) or complex karyotype (16). Prior to enrollment, FISH, molecular studies or routine cytogenetics must be completed to rule out these cytogenetic abnormalities.