Chronic myelomonocytic leukemia monocytes uniformly display a population of monocytes with CD11c underexpression. Journal Article

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Authors: Sojitra, P; Gandhi, P; Fitting, P; Kini, AR; Alkan, S; Velankar, MM; Venkataraman, G
Article Title: Chronic myelomonocytic leukemia monocytes uniformly display a population of monocytes with CD11c underexpression.
Abstract: OBJECTIVES: To examine the utility of CD11c expression on monocytes in normal controls and patients with chronic myelomonocytic leukemia (CMML) (n = 23) with flow cytometric immunophenotyping. METHODS: Twenty-three CMML samples and 10 control bone marrows submitted for lymphoma staging without evidence of disease were examined. RESULTS: Monocytes in CMML samples ranged from 4% to 35%. Expression of at least one aberrant monocytic marker was found on the monocytes in 18 (82%) of 22 evaluable cases. The most common aberrancy was underexpression of CD11c (n = 15), while none of the bone marrow controls showed underexpression of CD11c. CONCLUSIONS: A distinct heterogeneous population of monocytic cells with underexpression of CD11c was identified in all these cases. CD11c underexpression was independent of other aberrancies, including HLA-DR underexpression (n = 14), aberrant CD56 expression (n = 11), and underexpression of CD33, CD38, and CD14 (n = 6, 5, and 5, respectively), supporting the utility of CD11c expression status on monocytes in establishing a CMML diagnosis.
Journal Title: American Journal of Clinical Pathology
ISSN: 1943-7722; 0002-9173
Publisher: Unknown  
Date Published: 2013