appearance and disappearance of chronic myeloid leukemia (cml) in patient with chronic lymphocytic leukemia (cll).

chronic lymphocytic leukemia (cll) and chronic myeloid leukemia (cml) are the most common leukemias of the elderly (>43 year). however, the sequential occurrence of cml followed by cll in the same patient is extremely rare. in our report, a 52-year-old female was diagnosed with cll (type of bone marrow (bm) infiltration was nodular and interstitial) and was treated with chlorambucil. 64 months after the diagnosis of cll, she developed cml. she was treated with imatinib (400mg/day). after a few months, signs of cml were disappeared and cll became dominant. this is first reported case.