TY - JOUR
T1 - Flow cytometry immunophenotypic analysis of philadelphia-negative myeloproliferative neoplasms
T2 - Correlation with histopathologic features
AU - Ouyang, Juan
AU - Zheng, Wenli
AU - Shen, Qi
AU - Goswami, Maitrayee
AU - Jorgensen, Jeffrey L.
AU - Medeiros, L. Jeffrey
AU - Wang, S. A.
N1 - Publisher Copyright:
© 2014 International Clinical Cytometry Society.
PY - 2015/7/1
Y1 - 2015/7/1
N2 - Background Compared with the proven utility of flow cytometry immunophenotyping (FCI) analysis in the workup of myelodysplastic syndromes (MDS), immunophenotypic alterations in myeloproliferative neoplasms (MPN) have been less studied and the potential utility of FCI is not defined. Methods Bone marrow (BM) samples of 83 Philadelphia-negative MPN patients were assessed by multicolor FCI including 27 with essential thrombocythemia (ET); 17 polycythemia vera (PV); 33 primary myelofibrosis (PMF) and 6 MPN-unclassifiable (MPN-U). The time interval from initial diagnosis of MPN to FCI analysis was 18 months (0-370). Ninety-five age-matched MDS patients with a similar BM blast count were included for comparison. Results Immunophenotypic alterations, either in CD34+ cells or myelomonocytic cells, were detected in 82 of 83 (99%) MPN cases. FCI abnormalities were more frequently observed in cases with substantial myelofibrosis but not different between PMF and fibrotic stage of ET/PV. Furthermore, FCI abnormalities were more frequent in cases with ≥5% BM blasts and/or circulating blasts (P-=-0.006); as well as cases with an abnormal karyotype (P-=-0.036); but not associated with morphologic dysplasia or JAK2 mutation status. Comparing with MDS, FCI abnormalities were overall less pronounced in MPN cases (P-=-0.001). Conclusions MPNs exhibit frequent immunophenotypic alterations, more pronounced in cases with adverse histopathologic features. These findings illustrate that immunophenotypic alterations are a part of constellational findings in MPN, and correlate progressively with disease stage. The study results also suggest a role of FCI in diagnosis of MPN and monitoring disease over time and after therapy.
AB - Background Compared with the proven utility of flow cytometry immunophenotyping (FCI) analysis in the workup of myelodysplastic syndromes (MDS), immunophenotypic alterations in myeloproliferative neoplasms (MPN) have been less studied and the potential utility of FCI is not defined. Methods Bone marrow (BM) samples of 83 Philadelphia-negative MPN patients were assessed by multicolor FCI including 27 with essential thrombocythemia (ET); 17 polycythemia vera (PV); 33 primary myelofibrosis (PMF) and 6 MPN-unclassifiable (MPN-U). The time interval from initial diagnosis of MPN to FCI analysis was 18 months (0-370). Ninety-five age-matched MDS patients with a similar BM blast count were included for comparison. Results Immunophenotypic alterations, either in CD34+ cells or myelomonocytic cells, were detected in 82 of 83 (99%) MPN cases. FCI abnormalities were more frequently observed in cases with substantial myelofibrosis but not different between PMF and fibrotic stage of ET/PV. Furthermore, FCI abnormalities were more frequent in cases with ≥5% BM blasts and/or circulating blasts (P-=-0.006); as well as cases with an abnormal karyotype (P-=-0.036); but not associated with morphologic dysplasia or JAK2 mutation status. Comparing with MDS, FCI abnormalities were overall less pronounced in MPN cases (P-=-0.001). Conclusions MPNs exhibit frequent immunophenotypic alterations, more pronounced in cases with adverse histopathologic features. These findings illustrate that immunophenotypic alterations are a part of constellational findings in MPN, and correlate progressively with disease stage. The study results also suggest a role of FCI in diagnosis of MPN and monitoring disease over time and after therapy.
KW - Philadelphia-negative myeloproliferative neoplasm
KW - blasts
KW - cytogenetic
KW - dysplasia
KW - flow cytometry
KW - myelofibrosis
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U2 - 10.1002/cyto.b.21215
DO - 10.1002/cyto.b.21215
M3 - Article
C2 - 25557358
AN - SCOPUS:84932198106
SN - 1552-4949
VL - 88
SP - 236
EP - 243
JO - Cytometry Part B - Clinical Cytometry
JF - Cytometry Part B - Clinical Cytometry
IS - 4
ER -