Acute promyelocytic leukemia, hypogranular variant, with uncharacteristic staining with chloroacetate esterase.

Abstract:

:A diagnosis of the hypogranular variant of acute promyelocytic leukemia (APLv) may be difficult to establish based on cytomorphology alone. However, the great majority of cases have a classical immunophenotype by flow cytometric immunophenotyping (FCI) (CD13+, CD33+, dim CD64+, HLA-DR-, and CD34-) and a classical enzyme cytochemical (EC) staining pattern. [intensely staining with myeloperoxidase, Sudan Black B, and chloroacetate esterase (CAE) and negative with alpha'-naphthyl acetate and butyrate esterases]. Although the immunophenotype of APLv by FCI has varied in the literature (HLA-DR +/- and CD34 +/-), the EC staining pattern has remained constant. We report a case of APLv with characteristic cytomorphology, compatible FCI data (CD13+, CD33+, dim CD64+, HLA-DR +/-, and CD34-), chromosomal detection of t(15; 17), and molecular detection of the PML/RAR alpha fusion gene; however, staining of the leukemic cells with CAE was quite uncharacteristic. We describe our findings.

journal_name

Leuk Lymphoma

journal_title

Leukemia & lymphoma

authors

Dunphy CH,Polski JM,Johns G,Evans HL,Gardner LJ

doi

10.3109/10428190109097693

keywords:

subject

Has Abstract

pub_date

2001-06-01 00:00:00

pages

215-9

issue

1-2

eissn

1042-8194

issn

1029-2403

journal_volume

42

pub_type

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