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December 1976

Acute Myelocytic Leukemia

Arch Intern Med. 1976;136(12):1377-1381. doi:10.1001/archinte.1976.03630120029012

The difference between the chemotherapeutic response in patients with acute myelocytic leukemia (AML) and in those with acute lymphocytic leukemia (ALL) would appear to be more a problem of lack of regeneration of normal myeloid tissues than a lack of susceptibility of the neoplastic cell to chemotherapy. The lymphoblasts of ALL are more readily damaged by treatments used in induction than are the leukemic cells in AML. It is easily possible, however, to produce marrow aplasia in patients with AML with the multitude of myelosuppressive drugs available. The therapeutic dilemma is that treatments that are active in this regard also damage the normal myeloid tissue. This damage is often not repaired during the period available prior to death from infection or bleeding. The fact that differentiation between neoplastic and normal cells can be accomplished at all on chemotherapeutic grounds in such a critical organ as the marrow is remarkable. That

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