A 41-year-old female with Philadelphia chromosome (Ph1-positive chronic myelogenous leukemia was observed for 7 years. Cytotoxic therapy was not instituted until blastic crisis developed in the last 4 months. Successive hematologic measurements revealed cyclic fluctuations in blood leukocyte and platelet counts. These cycles had an average duration of 71 days during the 43 months observed. The oscillation amplitude decreased gradually over time, followed by hematologic remission until the last 4 months. The possible relationship between long-term survival and cyclic leukocytosis is discussed.
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© 1992 S. Karger AG, Basel
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