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Essential thrombocythemia
Pronunciation
Definition 1
An increased number of thrombocytes (platelets) in the blood, without a known cause. Also called essential thrombocytosis. (NCI Dictionary)
Definition 2
A chronic myeloproliferative neoplasm that involves primarily the megakaryocytic lineage. It is characterized by sustained thrombocytosis in the blood, increased numbers of large, mature megakaryocytes in the bone marrow, and episodes of thrombosis and/or hemorrhage. The cause is unknown. Median survival times of 10-15 years are commonly reported. (WHO, 2008) (NCI Thesaurus)
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