Your doctor may examine you for signs of ITP, ask you about your symptoms, and order laboratory tests. Classic ITP symptoms include bruising and bleeding, often seen with a platelet count of 30,000/mm3 to 50,000/mm3 (normal range 150,000/mm3 – 450,000/mm3 ). ¹

Careful examination, along with appropriate tests, may help your doctor exclude other possible causes of low platelet count, including taking certain medications or the presence of other diseases. ²  

1. Cines D.B., Blanchette V.S. Immune Thrombocytopenic Purpura. New England Journal of Medicine. 2002; 346(13): 995-1008.
2. Hematologic Diseases Information Service, A Service of the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), NIH, How is ITP Diagnosed? Available at http://www.hematologic.niddk.nih.gov/info/index.htm. Accessed June 25, 2007.