Primary isolated central nervous system acute lymphoblastic leukemia with BCR-ABL1 rearrangement: A case report

Figure 3 The fusion of BCR-ABL1 loci of cerebrospinal fluid was detected by fluorescence in situ hybridization using the vysis extra signal probeyielding red-green fusion signal. A: The image shows 1 green, 1 red, and 2 yellow signals a result of fusion of red and green; B: The fusion signal indicates a reciprocal translocation between chromosomes 9 and 22 forming a BCR-ABL fusion gene.