Thrombocytosis overview: Difference between revisions
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==Overview== | ==Overview== | ||
'''Thrombocytosis''' is the presence of high [[platelet]] counts in the [[blood]], and can be either reactive or primary (also termed essential and caused by a [[myeloproliferative disease]]). Although often symptomless (particularly when it is a secondary reaction), it can predispose to [[thrombosis]] in some patients. | |||
;Definition | |||
* 95% of the population will have a platelet count between 100K and 450K. Thrombocytosis is defined as >500K. Extreme thrombocytosis is defined as >1,000,000. Generally, a normal platelet count ranges from 150,000 and 450,000 per mm³. These limits, however, are determined by the 2.5th lower and upper [[percentile]], and a deviation does not necessary imply any form of disease. Nevertheless, counts over 750,000 (and especially over a million) are considered serious enough to warrant investigation and intervention. | |||
==References== | ==References== | ||
{{reflist|2}} | {{reflist|2}} | ||
Revision as of 13:42, 21 September 2012
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Thrombocytosis is the presence of high platelet counts in the blood, and can be either reactive or primary (also termed essential and caused by a myeloproliferative disease). Although often symptomless (particularly when it is a secondary reaction), it can predispose to thrombosis in some patients.
- Definition
- 95% of the population will have a platelet count between 100K and 450K. Thrombocytosis is defined as >500K. Extreme thrombocytosis is defined as >1,000,000. Generally, a normal platelet count ranges from 150,000 and 450,000 per mm³. These limits, however, are determined by the 2.5th lower and upper percentile, and a deviation does not necessary imply any form of disease. Nevertheless, counts over 750,000 (and especially over a million) are considered serious enough to warrant investigation and intervention.