Using our custom-built 4-fusion-tool-pipeline specifically optimized for detecting gene fusions in acute leukemias [21], the presence of the BCR-ABL1 fusion transcript was consistently identified by all four analytical tools and further confirmed by qualitative and quantitative RT-PCR [EasyPGX ready BCR-ABL Fusion (Diatech, Chiyoda-ku, Tokyo); BCR-ABL P210 ELITe MGB Kit (Elitech, San Jose, CA, USA)]. Here, ABL1 is linked to acute leukemia.