Thrombocytopenia

Definition of Thrombocytopenia

Thrombocytopenia is any disorder in which there is an abnormally low amount of platelets. Platelets are parts of the blood that help blood to clot. This condition is sometimes associated with abnormal bleeding.

Causes, incidence, and risk factors

Thrombocytopenia is often divided into three major causes of low platelets:

Signs and tests

(CBC) shows low number of platelets. Blood clotting studies (PTT and PT) are normal.

Treatment

Treatment depends on the cause of the condition. In some cases, a transfusion of platelets may be required to stop or prevent bleeding.

Expectations (prognosis)

The outcome depends on the disorder causing the low platelet counts.

Review

David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc. – 2/5/2010

ADAM Medical Encyclopedia

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