Human Monocytes - CD14, CD16 - Ziegler-Heitbrock


Clinical Utility of Classical and Nonclassical Monocyte Percentage in the Diagnosis of Chronic Myelomonocytic Leukemia.


Objectives: To determine if a clinically applicable flow cytometry methodology could identify chronic myelomonocytic leukemia (CMML) cases. Methods: Monocyte subset screening (CD14/CD16 expression) was performed on 68 blood and 25 bone marrow specimens with a monocytosis and/or flagged as possible CMML. Fifty thousand total events were obtained per case. Cases were categorized as CMML, atypical chronic myeloid leukemia (aCML), or non-CMML + non-aCML by clinicopathologic diagnosis. Results: The methodology differentiated blood and bone marrow CMML cases from non-CMML + non-aCML but not three aCML cases in the clinical setting. Furthermore, a decreased percentage of nonclassical monocytes (CD14dimCD16+) showed better sensitivity than the previously described approach that relied on increased percentage of classical monocytes (CD14brightCD16-). Conclusions: Quantification of monocyte subsets is useful in clinical practice as a diagnostic marker of CMML in blood and bone marrow specimens. The percentage of nonclassical monocytes should be included in analysis of monocyte subsets.

Authors: Hudson CA, Burack WR, Leary PC, Bennett JM.
Journal: Am J Clin Pathol. 2018 Aug 30;150(4):293-302
Year: 2018
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