An Unsuspected Finding of t(9;22): A Rare Case of Philadelphia Chromosome-Positive B-Lymphoblastic Lymphoma

Figure 2

Fluorescence in situ hybridization analysis with a LSI BCR/ABL1 ES probes (Abbott Molecular, Inc.) on a formalin-fixed paraffin-embedded L5 vertebral body biopsy. Cells with a signal pattern of 1 red, 1 green, and 2 yellow (fusion signal) are positive for BCR/ABL1 rearrangement (marked by arrow); cells with 2 red and 2 green are normal (marked by arrow head).