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Immune Thrombocytopenia
Background
Immune thrombocytopenia (ITP) is a disorder that affects around 4 in 100,000 children every year. Its basis is a dramatic and often sudden reduction in the number of platelets in the blood (small blood cells that are important in stopping bleeding). It used to be called idiopathic thrombocytopenic purpura, which means that we don’t know what causes the low platelet count (idiopathic) and sometimes it causes big bruises (purpura).