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. 1999 Jan 29;13(1):19–26. doi: 10.1002/(SICI)1098-2825(1999)13:1<19::AID-JCLA4>3.0.CO;2-1

Comprehensive review of adult acute myelogenous leukemia: Cytomorphological, enzyme cytochemical, flow cytometric immunophenotypic, and cytogenetic findings

Cherie H Dunphy 1,✉
PMCID: PMC6807799  PMID: 10025733

Abstract

This study reports findings from a retrospective, comprehensive review of 80 cases of adult AML in regard to cytomorphology, enzyme cytochemistry (EC), flow cytometric immunophenotyping (FCI), and chromosomal analysis. From this review, we conclude that diagnostically challenging cases can only be subtyped by combining the cytomorphology with EC, FCI, and subsequent cytogenetic results. This is particularly true in recognizing the hypogranular variant of AML,M3 (AML, M3m) and distinguishing it from other subtypes. Nonlineage expression of markers (CD1, CD2, CD4, CD5, CD7, and CD56) was nonspecific as to AML subtype. Of interest, CD2 coexpression in acute myelomonocytic leukemia with eosinophilia (M4‐Eo) was exclusively associated with inversion of chromosome 16 (inv 16) and was not observed in the other M4‐Eo's without inv16. We also recognized a previously undescribed M3m with CD56 coexpression, heightening awareness of this entity which needs to be distinguished from the unique subtype of CD56+ AML with otherwise similar immunophenotypic and morphologic characteristics. In addition, nonlineage expression of CD19 alone was exclusively associated with the cytogenetic finding of t (8;21) (q22; q22) and thus may represent a favorable prognostic indicator by FCI. J. Clin. Lab. Anal. 13:19–26, 1999. © 1999 Wiley‐Liss, Inc.

Keywords: AML, flow cytometry, cytogenetics, cytochemistry

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