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[Macrocytic anemia].

J Zittoun

    La Revue Du Praticien
    |October 21, 1989
    PubMed
    Summary
    This summary is machine-generated.

    Macrocytic anaemias in children often stem from impaired bone marrow production, frequently linked to folate or cobalamin issues. Less common causes include genetic enzyme defects or certain medications.

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    Area of Science:

    • Pediatric Hematology
    • Nutritional Biochemistry
    • Molecular Genetics

    Context:

    • Macrocytic and megaloblastic anaemias are significant hematological conditions in pediatric populations.
    • These anemias are typically characterized by defective bone marrow production rather than hemolysis.

    Purpose:

    • To elucidate the diverse etiologies of macrocytic and megaloblastic anaemias in infants and children.
    • To differentiate between common and rare causes, including nutritional deficiencies, metabolic disorders, and drug-induced conditions.

    Summary:

    • The primary causes involve folate and/or cobalamin deficiency or metabolic disturbances affecting these vitamins.
    • Congenital enzyme deficiencies in pyrimidine/purine biosynthesis and thiamine-responsive anemia are less frequent causes.

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  • Certain hematological disorders and drug toxicities (antifolates, antipurines, antipyrimidines) can also induce these anemias.

    • Impact:

    • Provides a comprehensive overview for clinicians diagnosing and managing pediatric anemias.
    • Highlights the importance of nutritional status and metabolic screening in affected children.
    • Informs therapeutic strategies by identifying specific underlying causes, from vitamin supplementation to addressing drug-induced effects.