NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,791 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

essential thrombocytosis
(eh-SENT-shul THROM-boh-sy-TOH-sis)
An increased number of thrombocytes (platelets) in the blood, without a known cause. Also called essential thrombocythemia.