Thrombocytopenic purpura are purpura associated with a reduction in circulating blood platelets which can result from a variety of causes, such as kaposi sarcoma.
Idiopathic thrombocytopenic purpura is used when the cause is unknown. However, most cases are considered to be immune-mediated.
Another form is thrombotic thrombocytopenic purpura.
Diagnosis is based on symptoms and a blood count showing low platelets.
Low number of platelets without clumping, normal megakaryocytes and normal leukocyte and erythrocyte number and morphology suggest immune thrombocytopenic purpura