Idiopathic thrombocytopenic purpura (ITP), also known as immune thrombocytopenic purpura, is a bleeding disorder characterized by a decrease in the number of blood platelets. While the condition is typically diagnosed through a blood test, the condition has multiple synonyms that can be used interchangeably, which include primary immune thrombocytopenia, immune-mediated thrombocytopenic purpura, and autoimmune thrombocytopenic purpura. The condition can cause bruising, petechiae, and excessive bleeding from minor cuts and injuries. While there is no known cure, treatment options range from corticosteroids and immunoglobulin therapy to medications that increase platelet production or remove the spleen.