High-resolution aCGH analysis of the cell line CML-T1 identified a gain at 9q34.1 starting at ABL1 breakpoint at 130.6 and covering 3.9Mb in 3' direction until the distal part of the RXRA gene at 134.5, confirming the FISH mapping data (Figure 3). The gene discussed is RXRA; the disease is chronic myelogenous leukemia, BCR-ABL1 positive.