Internal and Emergency Medicine

, Volume 7, Issue 6, pp 509–515

Polycythemia vera: gender-related phenotypic differences

  • Raffaele Landolfi
  • Leonardo Di Gennaro
  • Maria Anna Nicolazzi
  • Igor Giarretta
  • RosaMaria Marfisi
  • Roberto Marchioli
IM - ORIGINAL

DOI: 10.1007/s11739-011-0634-3

Cite this article as:
Landolfi, R., Di Gennaro, L., Nicolazzi, M.A. et al. Intern Emerg Med (2012) 7: 509. doi:10.1007/s11739-011-0634-3

Abstract

In polycythemia vera, gender has recently been shown to influence the JAK2V617F allele burden, but its effect on the disease phenotype is unknown. This issue was investigated using the database of the European Collaboration on Low-dose Aspirin in Polycythemia Vera (ECLAP) Study. The ECLAP Study recruited 1,638 polycythemic subjects and followed for 2.7 ± 1.3 years. At study entry, men, compared to women, had a higher prevalence of myocardial infarction (11.3 vs. 5.8%; P < 0.0001) and peripheral arterial disease (6.1 vs. 2.9%; P < 0.05) while a history of venous thrombosis was more common in women (11.4 vs. 7.9%, P = 0.016). Among 234 venous thrombosis, there were 39 splanchnic vein thromboses (33 extra-hepatic portal vein thromboses and 6 Budd-Chiari syndromes). Most of these events occurred as an early disease presentation in young female subjects. Women, compared to men, had higher platelet counts (average value 430 ± 213 vs. 375 ± 201 × 109/L; P < 0.0001) and lower hematocrits (0.46 ± 0.06 vs. 0.48 ± 0.06 l/l; P < 0.0001). Cholesterol plasma level, available in 995 subjects (61%), was lower in male patients (180.8 ± 43.1vs. 196 ± 46.6 mg/dl; P < 0.0001). During follow-up there were 205 major thromboses confirming an high incidence of myocardial infarction in men although not statistically significant (1.2 vs. 0.6 cases per 100 person-years; P > 0.05). These data show several gender-related differences both in the thrombotic diathesis and in the prevalence of vascular risk factors of PV patients.

Keywords

Myeloproliferative neoplasmsPolycythemia veraThrombosisGender

Copyright information

© SIMI 2011

Authors and Affiliations

  • Raffaele Landolfi
    • 1
  • Leonardo Di Gennaro
    • 1
  • Maria Anna Nicolazzi
    • 1
  • Igor Giarretta
    • 1
  • RosaMaria Marfisi
    • 2
  • Roberto Marchioli
    • 2
  1. 1.Institute of Internal Medicine and Geriatrics, Haemostasis Research CenterCatholic University School of MedicineRomeItaly
  2. 2.Laboratory of Clinical Epidemiology of Cardiovascular DiseaseSanta Maria ImbaroItaly