All four patients had two malignant clones: one with only t(9;22)(q34;q11.2) and another with der(9)t(9;22)(q34;q11.2)inv(9)(p22q34) that resulted in the separation of the ABL1/BCR fusion gene.     ///    "Reverse transcriptase-polymerase chain reaction revealed a b3a2 type of BCR/ABL1 fusion transcript in all of them, proving their disease to be Ph-positive leukemia. "