Abstract
Myelodysplastic syndromes (MDS) are classified by the WHO as myeloid neoplasms, and are characterized by cytopenia and dysplasia in one or more myeloid cell lines. Recently, a flow cytometric score (FCM-score) was published capable of discriminating low-grade MDS from non-clonal cytopenias (Della Porta et al., 2012). We tested the applicability of the FCM-score in a patient population from a large peripheral teaching hospital in The Netherlands. The evaluation of the proposed FCM score in low-grade MDS showed a high sensitivity and specificity, and clinically significant positive and negative likelihood ratios. The use of CD10 and CD19 positivity to identify progenitor B-cell blasts provided a specific and precize method to separate progenitor B-cell blasts from myeloid blasts within the CD34+/low CD45+ population and may be more convenient compared to the published method using low SSC and CD45 expression. This study confirms the value of utilizing the FCM-score in our patient population.
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