Is primary thrombocytosis cancer?

Primary thrombocytosis is an abnormal proliferation of megakaryocytes in the bone marrow. Platelet count is significantly increased. Clinical manifestations are bleeding and thrombosis tendency. The proliferation of megakaryocytes is not only in the bone marrow, but also can involve tissues outside the bone marrow, such as liver and spleen. It is a malignant disease. Due to the low degree of malignancy, the growth rate is slow, and the liver and spleen are often moderately enlarged. However, thrombocytosis is not cancer. Not all malignant tumors are called cancer. Cancer refers to a malignant tumor originating from epithelial tissues. Thrombocytosis can be treated by apheresis of platelets with a blood cell separator in the acute phase. This method is temporary after reducing platelets. Later, it will show rebound. It should be used in conjunction with bone marrow inhibitors, such as hydroxyurea, recombinant interferon, etc.