Idiopathic Thrombocytopenic Purpura (ITP) | Diagnosis & Tests

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How is ITP diagnosed?

Your doctor can begin to diagnose ITP by asking questions about your health and doing a physical exam. Your doctor may take a blood sample for a test that counts blood cells and platelets (called a CBC) or look at it under a microscope (called a blood smear). Your doctor may also want you to get a bone marrow exam to rule out other possible causes of your symptoms.

Many adults are only diagnosed with ITP when their blood is checked for another reason and a low blood platelet count is found.

Written by familydoctor.org editorial staff

Reviewed/Updated: 03/14
Created: 09/00

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