A retrospective analysis of the impact of treatments and blood counts on survival and the risk of vascular events during the course of polycythaemia vera.
Fiche publication
Date publication
mai 2017
Journal
British journal of haematology
Auteurs
Membres identifiés du Cancéropôle Est :
Dr JOOSTE Valérie, Pr GIRODON François
Tous les auteurs :
Enblom-Larsson A, Girodon F, Bak M, Hersby D, Jooste V, Hasselbalch H, Johansson P, Andreasson B
Lien Pubmed
Résumé
Vascular and non-vascular complications are common in patients with polycythaemia vera. This retrospective study of 217 patients with polycythaemia vera aimed to determine whether blood counts with respect to different treatments influenced the complication rate and survival. We found that 78 (36%) patients suffered from at least one complication during follow-up. Older age and elevated lactate dehydrogenase at diagnosis were found to be risk factors for vascular complications. When the vascular complication occurred, 41% of the patients with a complication had elevated white blood cells (WBC) compared with 20% of patients without a complication (P = 0·042). Patients treated with hydroxycarbamide (HC; also termed hydroxyurea) experienced significantly fewer vascular complications (11%) than patients treated with phlebotomy only (27%) (P = 0·013). We also found a survival advantage for patients treated with HC, when adjusted for age, gender and time period of diagnosis (Hazard ratio for phlebotomy-treated patients compared to HC-treated patients at 5 years was 2·42, 95% confidence interval 1·03-5·72, P = 0·043). Concerning survival and vascular complications, HC-treated patients who needed at least one phlebotomy per year were not significantly different from HC-treated patients with a low phlebotomy requirement. We conclude that complementary phlebotomy in HC-treated patients in order to maintain the haematocrit, is safe.
Mots clés
hydroxycarbamide, myeloproliferative disease, polycythaemia vera, venesection
Référence
Br. J. Haematol.. 2017 May;: