Thrombocytosis and leukocytosis interaction in vascular complications of essential thrombocythemia.

Abstract:

:To elucidate the role of thrombocytosis, alone or in combination with standard (age, previous cardiovascular events) and novel (leukocytosis, JAK2(V617F) mutational status) risk factors, in the cardiovascular events of essential thrombocythemia (ET), we analyzed a cohort of 1063 patients. We found that a platelet count at diagnosis greater than 1000 x 10(9)/L was associated with significantly lower rate of thrombosis in multivariable analysis and, if combined with leukocytes less than 11 x 10(9)/L, pointed to a "low-risk" category with a rate of thrombosis of 1.59% of patients/year. On the contrary, the highest risk category (thrombosis rate, 2.95% of patients/year) was constituted of patients with leukocytosis, lower platelet count, and a JAK2(V617F) mutated genotype in most cases (77% vs 26% in the low-risk group), independently from standard risk factors. These data challenge the theory that elevated platelet count increases thrombosis risk in ET and suggest prospective clinical trials to support this hypothesis.

journal_name

Blood

journal_title

Blood

authors

Carobbio A,Finazzi G,Antonioli E,Guglielmelli P,Vannucchi AM,Delaini F,Guerini V,Ruggeri M,Rodeghiero F,Rambaldi A,Barbui T

doi

10.1182/blood-2008-04-153783

subject

Has Abstract

pub_date

2008-10-15 00:00:00

pages

3135-7

issue

8

eissn

0006-4971

issn

1528-0020

pii

blood-2008-04-153783

journal_volume

112

pub_type

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