Myeloperoxidase-positive acute megakaryoblastic leukemia.

Abstract

Acute megakaryoblastic leukemia (FABM7) is an unusual but well recognized form of acute myelogenous leukemia in which the bone marrow blast cells are phenotypically recognized by the demonstration of cytoplasmic platelet peroxidase or surface staining for the IIb/IIIa platelet-specific glycoprotein. Herein, the authors report a case of acute megakaryoblastic leukemia that satisfies the accepted French-American-British criteria and in which the blast cells also exhibit evidence of myeloid differentiation, including surface MY7 (CD13) by flow cytometry and immunocytochemical positivity for myeloperoxidase. These findings suggest that megakaryoblasts may be closely related to myelomonoblasts, that they have the potential to partially differentiate along multiple phenotypic lines, and that aberrant phenotypes can occur that do not correspond to known stages of normal maturation. The authors illustrate the difficulty in classification of these aberrant phenotypes by standard cytochemical and morphologic criteria.

• Authors: L C Moscinski, A L So, J E Russell, J A Kant, M B Prystowsky
• Journal: American journal of clinical pathology (Am J Clin Pathol) Vol. 91 Issue 5 Pg. 607-12 (May 1989) ISSN: 0002-9173 [Print] England
• PMID: 2541607 (Publication Type: Case Reports, Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, P.H.S.)

Chemical References

• DNA
• Peroxidase

Topics

• Cell Membrane (immunology)
• DNA (genetics)
• Female
• Humans
• Immunohistochemistry
• Leukemia, Megakaryoblastic, Acute (enzymology, immunology, pathology)
• Middle Aged
• Peroxidase (metabolism)
• Phenotype