Essential thrombocythaemia (ET) is a rare blood cancer that causes a high number of blood cells called platelets to form. These cells are involved in blood clotting.
It is one of a group of conditions called myeloproliferative neoplasms or myeloproliferative disorders.
We have more information on the diagnosis and treatment of essential thrombocythaemia. And information on organisations that provide support to help you cope.
Find out about essential thrombocythaemia including risks, causes and possible symptoms.
The first test to diagnose ET is usually a blood test. Read about the tests to diagnose and the treatment you might have.
Find information on research into essential thrombocythaemia and read about organisations and resources that can help you cope.