Cancer Treatment Centers of America

Thrombocytopenia medical animation

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Blood cells are produced in the bone marrow. The three main components of blood are red blood cells, which carry oxygen, white blood cells or leukocytes which fight infection, and platelets, also called thrombocytes which assist in the formation of blood clots.

When a blood vessel is damaged platelets adhere to the surface of the damaged vessel and release chemicals. These chemicals attract more platelets as well as red blood cells in order to form a clot or thrombus. As the clot grows the blood vessel narrows, thereby decreasing blood loss. This process is called coagulation.

Normal platelet counts are in the range of 150,000 to 350,000 platelets per microliter. Thrombocytopenia is a disorder in which there are not enough platelets. When the platelet count is decreased the body is unable to form blood clots and therefore is unable to control bleeding. Bruising and bleeding can occur from relatively little trauma. When the platelet count gets below 10,000 platelets per microliter bleeding can develop without trauma.

Chemotherapy induced thrombocytopenia is a disorder that develops as an adverse effect of chemotherapy. Cancer drugs not only kill cancer cells they can also damage the platelet forming cells in the bone marrow. The severity of this disorder depends on the type of chemotherapy and the duration of treatment.

Fortunately, chemotherapy induced thrombocytopenia can be managed with platelet transfusions, additional medications such as blood cell growth factors, or with blood stem cell transplants.

The medical animation illustrates the importance of proper blood clotting. It shows how a low number of platelets can lead to easy bleeding and bruising. The narrator describes thrombocytopenia as an adverse side effect of chemotherapy.

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