essential thrombocytosis
Meaning of essential thrombocytosis: Essential thrombocytosis describes a persistently elevated platelet count arising from a primary bone marrow disorder rather than a temporary reactive process.
Definition of essential thrombocytosis
Essential thrombocytosis is a condition in which the bone marrow produces a persistently elevated number of platelets, the blood cells responsible for clotting, in the absence of an underlying reactive trigger such as infection, inflammation, iron deficiency, or a recent bleeding episode. It is classified among the myeloproliferative neoplasms, a group of disorders in which the bone marrow overproduces one or more blood cell types.
An acquired mutation in a gene such as JAK2, CALR, or MPL is found in many cases and is thought to drive the abnormal platelet production, and the condition is frequently identified incidentally through a routine blood count rather than because of symptoms.
Because a markedly elevated platelet count can increase the risk of abnormal blood clotting, and in some situations bleeding, essential thrombocytosis is generally followed over time and treated when warranted with medication that lowers platelet count or reduces clotting risk, an approach based on individual risk rather than the platelet count in isolation.
Also known as
Used in a sentence
The hematologist confirmed essential thrombocytosis after ruling out reactive causes of the elevated platelet count.
Good to know
Essential thrombocytosis reflects a primary bone marrow disorder and is distinguished from the more common reactive thrombocytosis caused by infection, inflammation, or iron deficiency.
Word origin
Where “essential thrombocytosis” comes from
Formed from Greek thrombos, meaning clot, and kytos, meaning cell, combined with the suffix -osis, meaning an abnormal condition.