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
Bloodjournal_title
Bloodauthors
Carobbio A,Finazzi G,Antonioli E,Guglielmelli P,Vannucchi AM,Delaini F,Guerini V,Ruggeri M,Rodeghiero F,Rambaldi A,Barbui Tdoi
10.1182/blood-2008-04-153783subject
Has Abstractpub_date
2008-10-15 00:00:00pages
3135-7issue
8eissn
0006-4971issn
1528-0020pii
blood-2008-04-153783journal_volume
112pub_type
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