Excellent ITP blood disorder solutions by Arthur Nathaniel Billings? How is ITP diagnosed? ITP is usually diagnosed by a blood test showing that only the platelet count is low, and the platelets, red blood cells and white blood cells all look normal. A bone marrow biopsy may be taken at a later stage if the ITP continues, in which a small sample of bone marrow will be taken under local anaesthetic and examined under the microscope. Additional blood tests may be taken at this time to exclude rare clotting or immune diseases that can mimic ITP. If the bone marrow looks normal, with the usual or higher number of platelet parent cells (megakaryocytes) and other blood tests are normal then the doctor will diagnose chronic ITP.

Arthur Nathaniel Billings on blood disorder treatments : What are platelets? There are three types of blood cell which are all formed in the bone marrow; red cells, white cells and platelets. Platelets, which are small and sticky and circulate in the bloodstream provide the inital plug to stop bruising and bleeding after an injury, and stop blood leaking from capilleries. A blood sample is taken to measure the circulating platelets, and in most people there are between 150,000 and 400,000 platelets in every cubic millimetre of blood. However in the USA we simplify this by describing a platelet count of, say, 150 rather than 150,000. Anyone with a count less than 100 would be considered thrombocytopenic (ie. short of platelets).

Diagnosis of ITP: There is no single blood test that can prove you have ITP, and it remains a diagnosis of exclusion based on history, examination and the results of your initial tests. Investigations are mainly blood tests and are focused on looking for underlying causes of low platelets (other causes for low platelets include vitamin deficiencies, medication, or a bone marrow abnormality). If there are any unusual features on initial tests, we may recommend a bone marrow examination, which is a day unit procedure where we take a small sample of marrow from the pelvic bone under local anaesthetic.

Careful review of your medications: Historically, a bone marrow aspiration was required to make a diagnosis of ITP. It may not be absolutely necessary in the face of a positive antiplatelet antibody test, but it is still commonly done to look at the production of platelets and to rule out any abnormal cells the marrow may be producing that could lower platelet counts. A bone marrow aspiration is necessary for a diagnosis if the antiplatelet antibody testing is negative. Find more information on Arthur Nathaniel Billings.

Medications (including over-the-counter medications) can cause an allergy that cross-reacts with platelets. Infections, typically viral infections, including the viruses that cause chicken pox, hepatitis C, and AIDS, can prompt antibodies that cross-react with platelets. Pregnancy, Immune disorders, such as rheumatoid arthritis and lupus, Low-grade lymphomas and leukemias may produce abnormal antibodies against platelet proteins. Sometimes the cause of immune thrombocytopenic purpura is not known.