Cytogenetic abnormalities are the hallmark of leukemias.We report here two cases of unusual cytogenetic abnormalities associated with Philadelphia chromosome,one with mixed phenotypic acute leukemia showing monosomy 7 and t(9;22)(q34;q11.2)and the other with chronic myeloid leukemia and additional translocation involving chromosomes 10 and 13.Both patients achieved complete remission following imatinib based treatment.