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Raskovalova, Tatiana; Berger, Marc G; Jacob, Marie-Christine; Park, Sophie; Campos, Lydia; Aanei, Carmen Mariana; Kasprzak, Julie; Pereira, Bruno; Labarère, José; Cesbron, Jean-Yves; Veyrat-Masson, Richard
Haematologica (Roma), 12/2019, Volume: 104, Issue: 12Journal Article
Suspicion of myelodysplastic syndromes (MDS) is one of the commonest reasons for bone marrow aspirate in elderly patients presenting with persistent peripheral blood (PB) cytopenia of unclear etiology. A PB assay that accurately rules out MDS would have major benefits. The diagnostic accuracy of the intra-individual robust coefficient of variation (RCV) for neutrophil myeloperoxidase (MPO) expression measured by flow cytometric analysis in PB was evaluated in a retrospective derivation study (44 MDS cases and 44 controls) and a prospective validation study (68 consecutive patients with suspected MDS). Compared with controls, MDS cases had higher median RCV values for neutrophil MPO expression (40.2% 30.9%; <0.001). The area under the receiver operating characteristic curve estimates were 0.94 95% confidence interval (CI): 0.86-0.97 and 0.87 (95%CI: 0.76-0.94) in the derivation and validation studies, respectively. A RCV lower than 30% ruled out MDS with 100% sensitivity (95%CI: 78-100%) and 100% negative predictive value (95%CI: 83-100%) in the prospective validation study. Neutrophil MPO expression measured by flow cytometric analysis in PB might obviate the need for invasive bone marrow aspirate and biopsy for up to 29% of patients with suspected MDS.
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