Detailed FISH analysis identified a cryptic t(9;12) translocation, and molecular studies confirmed the presence of the ETV6-ABL fusion transcript.     ///     We report the transient response of a patient with the ETV6-ABL fusion gene to imatinib mesylate (STI571).     ///    Transient response to imatinib mesylate (STI571) in a patient with the ETV6-ABL t(9;12) translocation.. 