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Platelets are parts of the blood that help form blood clots. Thrombocytosis (throm-boe-sie-TOE-sis) is a disorder in which your body produces too many platelets.
It's called reactive thrombocytosis or secondary thrombocytosis when the cause is an underlying condition, such as an infection.
Less commonly, when the high platelet count has no apparent underlying condition as a cause, the disorder is called primary thrombocythemia or essential thrombocythemia. This is a...
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People with high platelet levels often don't have signs or symptoms. When symptoms occur, they're often related to blood clots. Examples include:
Bone marrow is a spongy tissue inside your bones. It contains stem cells that can become red blood cells, white blood cells or platelets. Platelets stick together, helping blood to form a clot that stops bleeding when you damage a blood vessel, such as when you cut yourself. Thrombocytosis occurs when your body produces too many platelets.
This is the more common type of thrombocytosis. It's caused by an underlying medical problem, such as:...
Treatment for this condition depends on the cause.
For informational purposes only and not a substitute for professional medical advice, diagnosis, or treatment.
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