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[Preleukemia].

D Janić, E Stojimirović

    Bilten Za Hematologiju I Transfuziju
    |January 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    Preleukemia syndromes, characterized by marrow stem disorders preceding overt leukemia, present distinct clinical and hematological features. Recognizing these preleukemic signs is crucial for timely diagnosis and management of acute lymphoblastic leukemia (ALL) and acute non-lymphoblastic leukemia (ANLL).

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    Area of Science:

    • Hematology
    • Oncology
    • Stem Cell Biology

    Background:

    • Preleukemia syndromes, defined as marrow stem disorders with recognizable hematological abnormalities preceding overt leukemia, have historically been ill-defined.
    • Recent consensus defines preleukemia as a distinct entity requiring careful clinical and hematological evaluation.

    Observation:

    • Two distinct cases of preleukemia are presented: one evolving into acute lymphoblastic leukemia (ALL) and the other into acute non-lymphoblastic leukemia (ANLL).
    • The first case exhibited pancytopenia and hypocellular bone marrow preceding overt ALL, with associated lymphadenopathy, hepatosplenomegaly, and bone marrow blast infiltration (L1 morphology).
    • The second case, preceding ANLL, presented with pancytopenia and hypercellular bone marrow infiltrated with histiocytes demonstrating phagocytosis of blood cells, later diagnosed as acute monoblastic leukemia (M5).

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    Findings:

    • Clinical and hematological manifestations of preleukemic syndromes differ significantly based on the type of leukemia that subsequently develops (ALL vs. ANLL).
    • Key diagnostic indicators include specific patterns of cytopenia, bone marrow cellularity, and the presence of characteristic cell morphologies (e.g., blasts in ALL, monoblasts in ANLL).

    Implications:

    • Early recognition of preleukemic syndromes through careful assessment of clinical and hematological features can facilitate timely diagnosis of leukemia.
    • Understanding the distinct presentations of preleukemia associated with ALL and ANLL aids in refining diagnostic criteria and potentially developing targeted therapeutic strategies.
    • These case reports highlight the importance of recognizing subtle hematological changes as potential precursors to overt leukemia.