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Related Experiment Videos

Microgranular promyelocytic leukemia: a multiparameter examination.

J R Krause1, V Stolc, S S Kaplan

  • 1Department of Pathology, University of Pittsburgh School of Medicine, PA.

American Journal of Hematology
|March 1, 1989
PubMed
Summary

Microgranular acute promyelocytic leukemia (M3v) cases show mixed myeloid and T-cell markers. Further research is needed to understand lineage infidelity in these rare leukemia subtypes.

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Area of Science:

  • Hematology
  • Oncology
  • Immunology

Background:

  • Microgranular variant acute promyelocytic leukemia (M3v) is a rare subtype.
  • Understanding its immunophenotype is crucial for diagnosis and treatment.

Purpose of the Study:

  • To investigate the immunophenotypic characteristics of M3v using a multiparameter approach.
  • To explore potential lineage infidelity in M3v.

Main Methods:

  • Morphology, cytochemistry, flow cytometry, cytogenetics, and gene rearrangement analysis were performed.
  • Surface markers associated with myeloid, monocytoid, and T-cell lineages were assessed.

Main Results:

  • Three of six M3v cases expressed both myeloid and monocytoid markers.

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  • Four of six cases showed T-cell-associated antigens on promyelocytes without T-B receptor gene rearrangement.
  • A single clonal cytogenetic abnormality, t(15q+; 17q-), was observed.

    • Conclusions:

    • M3v cases can exhibit co-expression of myeloid and T-cell markers, suggesting potential lineage infidelity.
    • Further studies on normal hematopoietic progenitor cells are needed to clarify lineage characteristics and co-expression during development.