We analyzed the t(12;21) translocation and other related abnormalities using the fluorescent in situ hybridization (FISH) technique with the ETV6(TEL)/RUNX1(AML1) ES dual color translocation probe.     ///    "The frequency of FISH abnormalities in pediatric ALL cases were as follows: 8.5?% for t(12;21)(p13;q22) ETV6/RUNX1 fusion, 6.0?% for RUNX1 amplification, 3.0?% for tetrasomy/trisomy 21, 1.8?% for ETV6 deletion, 1.21?% for ETV6 deletion with RUNX1 amplification, 1.21?% for ETV6 amplification with RUNX1 amplification, 0.6?% for polyploidy, 0.6?% for RUNX1 deletion, and 0.6?% for diminished ETV6 signal. "    ///    Evaluation of ETV6/RUNX1 Fusion and Additional Abnormalities Involving ETV6 and/or RUNX1 Genes Using FISH Technique in Patients with Childhood Acute Lymphoblastic Leukemia.. 