A high platelet count indicates too many of the small cells (platelets) that help form blood clots. This can cause dangerous clots and bleeding. Also called thrombocytosis or thrombocythemia, ...

A mean platelet volume (MPV) blood test measures the average size of your platelets, the tiny blood cells that help form clots to stop bleeding. It is often included in a complete blood count (CBC) ...

Essential thrombocythemia (ET) is a type of myeloproliferative neoplasm (MPN), a rare blood disorder that causes an increase in the number of blood cells. Some symptoms include headaches, dizziness, ...

Essential thrombocythemia is a chronic condition with excessive platelet production, increasing thrombosis risk, and is often linked to JAK2, CALR, or MPL mutations. Stage 1 ET is manageable with ...

Some medications can cause a low platelet count, which can lead to excessive bleeding. Heparin is the most frequent cause, but common drugs like acetaminophen and some antibiotics can also cause ...

Persistent thrombocytosis in ET increases arterial/venous thrombosis risk and, at extreme counts, acquired platelet dysfunction with hemorrhage, making risk stratification and symptom surveillance ...

Megakaryocytes, which are derived from hematopoietic stem cell precursors in bone marrow, form and release platelets; these circulate in the blood for 8 to 10 days before they are removed by hepatic ...