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Essential thrombocythaemia (ET)

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Essential thrombocythaemia (ET) is a type of blood cancer where your body makes too many blood cells called platelets.

This information has been accredited with the PIF TICK, the UK's only quality mark for trusted health information.

Last full review 2023. Next full review due 2026. We make factual updates to the information throughout this period.

Thank you to Consultant Haematologists Clare Kane and Mallika Sekhar for checking the medical content of our ET information, and to Clinical Nurse Specialists Jodie Nightingill and Madeleine Ward for their guidance and support.