thrombocytopenia purpura (disease) immune system disease thrombotic microangiopathy thrombocytopenic purpura MESH:D011696 MONDO:0043768 NCIT:C26870 Purpura associated with a reduction in circulating blood platelets which can result from a variety of factors. SCTID:302873008 UMLS:C0857305 purpura, thrombopenic purpuras, thrombocytopenic purpuras, thrombopenic thrombocytopenic purpura thrombocytopenic purpuras thrombopenic purpura thrombopenic purpuras