Thrombocythemia and Thrombocytosis
What Are Thrombocythemia and Thrombocytosis?
Thrombocythemia (THROM-bo-si-THE-me-ah) and thrombocytosis (THROM-bo-si-TO-sis) are conditions in which your blood has a higher than normal number of platelets (PLATE-lets). Platelets are blood cell fragments. They’re made in your bone marrow along with other kinds of blood cells. Platelets travel through your blood vessels and stick together (clot) to stop any bleeding that could... »