存在于大约 40% 的患者中。[53]Beutler E. Polcythemia. In: Beutler E, Lichtman MA, Coller BS, et al, eds. Williams hematology. 6th ed. New York: McGraw-Hill; 2001:689-701.
通常严重。
一般由接触温水引起。
患者一般对常用疗法产生抵抗,但干扰素可能有效,[54]Saini KS, Patnaik MM, Tefferi A. Polycythemia vera-associated pruritus and its management. Eur J Clin Invest. 2010;40:828-834.http://www.ncbi.nlm.nih.gov/pubmed/20597963?tool=bestpractice.com芦可替尼也可能有效。[55]Vannucchi AM, Kiladjian JJ, Griesshammer M, et al. Ruxolitinib versus standard therapy for the treatment of polycythemia vera. N Engl J Med. 2015;372:426-435.http://www.ncbi.nlm.nih.gov/pubmed/25629741?tool=bestpractice.com
可能与更低的动脉血栓形成风险和更长的生存期相关。[10]Tefferi A, Rumi E, Finazzi G, et al. Survival and prognosis among 1545 patients with contemporary polycythemia vera: an international study. Leukemia. 2013;27:1874-1881.http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3768558/http://www.ncbi.nlm.nih.gov/pubmed/23739289?tool=bestpractice.com[56]Gangat N, Strand JJ, Lasho TL, et al. Pruritus in polycythemia vera is associated with a lower risk of arterial thrombosis. Am J Hematol. 2008;83:451-453.http://onlinelibrary.wiley.com/doi/10.1002/ajh.21156/abstracthttp://www.ncbi.nlm.nih.gov/pubmed/18257107?tool=bestpractice.com