II. Causes: Megaloblastic Macrocytic Anemia

III. Causes: Non-megaloblastic Macrocytic Anemia (Marrow Toxins)

  1. Methotrexate
  2. Daunorubicin
  3. Adriamycin
  4. Benzene and derivatives (e.g. trinitrotoluene)
  5. Purine Antagonists
    1. 6-Mercaptopurine
    2. Thioguanine
    3. Azathioprine (Imuran)
    4. Acyclovir (Zovirax)
  6. Pyrimidine Antagonists
    1. Fluorouracil (Adrucil)
    2. Floxuridine (FUDR)
    3. Azidouridine
    4. Zidovudine (Retrovir)
  7. Ribonucleotide Reduction Inhibitors
    1. Hydroxyurea
    2. Cytosine arabinoside
  8. Alkylating Agents
    1. Cyclophosphamide (Cytoxan)
    2. Busulfan

IV. References

  1. Lee (1999) Wintrobe's Hematology, Lippincott, p. 1453
  2. Brigden (1995) Postgrad Med 97(5):171-86 [PubMed]

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