FGFR1 and acute lymphoblastic leukemia: Though usually presenting as an atypical chronic myeloid leukemia, the present case is the fourth BCR-FGFR1-positive patient diagnosed with lymphoblastic leukemia (Table 1) suggesting that specific domains or amino acid residues of the translocation partner protein of FGFR1 may not be the dominant factor that influences the presenting phenotype [22].