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Immune thrombocytopenic purpura (ITP), also known as idiopathic thrombocytopenic purpura or immune thrombocytopenia, is an autoimmune primary disorder of hemostasis characterized by a low platelet count in the absence of other causes.
Immune-mediated thrombocytopaenia (IMT) is a disease common in dogs and rare in cats. The disease is characterised by a low platelet count caused by destruction of the platelets from the immune system. IMT is the most common cause of thrombocytopaenia in dogs. [1]
Thrombotic thrombocytopenic purpura (TTP) is a blood disorder that results in blood clots forming in small blood vessels throughout the body. [2] This results in a low platelet count , low red blood cells due to their breakdown , and often kidney , heart , and brain dysfunction. [ 1 ]
One common definition of thrombocytopenia requiring emergency treatment is a platelet count below 50,000/μL. [5] Thrombocytopenia can be contrasted with the conditions associated with an abnormally high level of platelets in the blood – thrombocythemia (when the cause is unknown), and thrombocytosis (when the cause is known). [6] [7]
By tradition, the term idiopathic thrombocytopenic purpura is used when the cause is idiopathic, or unknown. However, most cases are now considered to be immune-mediated. [citation needed] Another form is thrombotic thrombocytopenic purpura. [citation needed]
Immune thrombocytopenic purpura is a condition in which platelets are destroyed by an autoimmune process. Platelets are a component of blood that contribute to the formation of blood clots in the body to prevent bleeding. The syndrome was first described in 1951 by R. S. Evans and colleagues. [1]
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