Minimally differentiated acute leukemia

Leukemia Research
F J CadwellJ A Goeken

Abstract

We have studied 35 adult patients with morphologically undifferentiated peroxidase-negative acute leukemia that failed to meet the criteria for acute lymphoblastic leukemia and compared them to patients with FAB M1-M7 seen by the same physicians. The diagnosis of minimally differentiated acute leukemia (MD-AL) was associated with a higher incidence of prior hematologic disease, lower WBC, fewer blood blasts, lower marrow cellularity and a tendency towards older age. Of all patients treated with AML since January 1983, those with MD-AL were less likely to get a complete remission than those with other subtypes (35 vs 64%, p = 0.03). Treatment failure was usually due to resistant disease. Analysis of outcome as a function of drugs used during induction therapy showed an advantage for regimens containing vincristine and prednisone. The leukemic blast cells of nine patients were immunophenotyped for myeloid, lymphoid and megakaryoblast/platelet antigens. Although there were too few for a full statistical analysis as was applied to the larger group of 35 patients with MD-AL, these patients had a lower bone marrow cellularity as compared to FAB M1-M7 and a low remission rate. Eight of these were found to have positive myeloid markers...Continue Reading

References

Feb 1, 1979·British Journal of Haematology·J A WhittakerM Khurshid
Feb 1, 1977·Proceedings of the National Academy of Sciences of the United States of America·I GoldschneiderF J Bollum
Aug 1, 1986·The Journal of Infectious Diseases·S R PrebludA R Hinman
Sep 15, 1981·Cancer·S W NeedlemanJ O Armitage

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