BJH - volume 9, issue 5, september 2018
I. Depoortere MD, V. Maertens MD, M. Criel , M. Vanden Driessche MD, I. Geerts MD
We present a case of a 73-year old patient with polycythaemia vera in whom cyclic thrombocytopenia was diagnosed. Strong fluctuations in platelet count, ranging from 31 to 1334 × 103/µL, were noticed after onset of hydroxyurea therapy. We did a literature search to find possible underlying causes of cyclic thrombocytopenia that could guide us towards a fast and appropriate diagnosis and an optimal treatment. In literature, provoked and unprovoked oscillations in platelet numbers have been described. Unprovoked oscillations can most likely be attributed to an unstable haematopoietic stem cell pool, as can be seen in polycythaemia vera. Provoked oscillations could be associated with myelosuppressive agents such as hydroxyurea. In both situations, a decrease in platelet count can be followed by a compensatory thrombopoietin-induced stimulation of megakaryocytes. Frequent hydroxyurea dose adjustments may be carried out in an attempt to control this cyclic pattern but, by contrast, may provoke a bouncing ball effect on platelet count. Certain patients will therefore benefit from maintaining therapy at a constant dose; while certain others require withholding or switching therapy. Cyclic thrombocytopenia is a rare finding and is frequently misdiagnosed as immune thrombocytopenia. If hydroxyurea-treated patients with a chronic myeloproliferative disorder present with thrombocytopenia, cyclic thrombocytopenia should be considered. Intensive follow-up with regular control of platelet count and personalised therapy is mandatory.
(BELG J HEMATOL 2018;9(5):188–91)
Read moreBJH - 2018, issue Abstract Book BHS, february 2018
I. Depoortere MD, V. Maertens MD, M. Criel , I. Geerts MD
BJH - volume 5, issue Abstract Book BHS, january 2014
J. Caers MD, PhD, M-C. Vekemans MD, I. Vande Broek MD, PhD, V. Maertens MD, P.H. Mineur , G. Bries MD, PhD, E. Vandeneste , G. Vanstraelen , K. Beel MD, PhD, F. Leleu , H. Demuynck MD, C. Scheurmans , A. Van de Velde MD, W. Schroyens MD, PhD, K.L. Wu MD, PhD, N. Meuleman MD, PhD, R. Schots MD, PhD, M. Delforge MD, PhD, C. Doyen MD, PhD
BJH - 2013, issue BHS Abstractbook, january 2013
J. Caers MD, PhD, M-C. Vekemans MD, I. Vande Broek MD, PhD, P.H. Mineur , K. Beel MD, PhD, V. Maertens MD, C. Schuermans MD, F. Leleu , G. Vanstraelen , H. Demuynck MD, W. Schroyens MD, PhD, E. Van den Neste MD, PhD, G. Bries MD, PhD, A. Van de Velde MD, M. Delforge MD, PhD, C. Doyen MD, PhD
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