Purpura, Thrombocytopenic, Idiopathic

**Definition:** Thrombocytopenia occurring in the absence of toxic exposure or a disease associated with decreased platelets. It is mediated by immune mechanisms, in most cases IMMUNOGLOBULIN G autoantibodies which attach to platelets and subsequently undergo destruction by macrophages. The disease is seen in acute (affecting children) and chronic (adult) forms.

**Tree numbers:** - C15.378.100.802.687.600 - C15.378.140.855.925.750.600 - C15.378.243.937.925.750.600 - C15.378.463.740 - C20.111.759 - C20.841.600 - C23.550.414.950.687.600 - C23.888.885.687.687.600

**Synonyms:** - Autoimmune Thrombocytopenia - Immune Thrombocytopenic Purpura - Thrombocytopenic Purpura, Autoimmune - Immune Thrombocytopenia - Werlhof Disease - Werlhof's Disease - Autoimmune Thrombocytopenic Purpura - Idiopathic Thrombocytopenic Purpura - Purpura, Thrombocytopenic, Autoimmune