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Chemotherapy related leukemogenesis.

D Meytes, B Ramot

    Archives of Toxicology. Supplement. = Archiv Fur Toxikologie. Supplement
    |January 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    Aggressive chemotherapy can lead to secondary acute leukemia, a serious complication. This risk increases with prolonged treatment, particularly with alkylating agents, and involves a preleukemic phase.

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    Area of Science:

    • Oncology
    • Hematology
    • Cancer Research

    Background:

    • Cancer chemotherapy has improved patient outcomes but can cause secondary malignancies.
    • Acute leukemia is an emerging complication of aggressive cancer treatments.

    Purpose of the Study:

    • To investigate the complication of secondary acute leukemia following cancer chemotherapy.
    • To understand the pathogenesis and clinical characteristics of chemotherapy-induced leukemia.

    Main Methods:

    • Review of clinical data and literature on secondary leukemia after chemotherapy.
    • Analysis of preleukemic phase characteristics, including pancytopenia and refractory anemia.
    • Examination of cytogenetic abnormalities (e.g., chromosomes 5 and 7) and leukemia subtypes.

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    Main Results:

    • Secondary acute leukemia typically emerges about 5 years after initiating chemotherapy, with increasing incidence over time.
    • Myelomonocytic, monocytic, and erythroleukemia with atypical features and resistance to therapy are common.
    • Hypoploidy and chromosomal aberrations involving chromosomes 5 and 7 are frequently observed.

    Conclusions:

    • Chemotherapy, especially prolonged use of alkylating agents, increases the risk of secondary acute leukemia.
    • Leukemogenesis is a multistep process involving DNA errors, stem cell replication, and immunosuppression.
    • An underlying predisposition to leukemia may be present and exacerbated by chemotherapy, leading to increased incidence in long-term survivors.