| Summary: | Abstract Introduction Both disseminated intravascular coagulation (DIC) and thrombotic microangiopathy (TMA) cause microvascular thrombosis associated with thrombocytopenia, bleeding tendency and organ failure. Reports and discussion The frequency of DIC is higher than that of thrombotic thrombocytopenic purpura (TTP). Many patients with TMA are diagnosed with DIC, but only about 15% of DIC patients are diagnosed with TMA. Hyperfibrinolysis is observed in most patients with DIC, and microangiopathic hemolytic anemia is observed in most patients with TMA. Markedly decreased ADAMTS13 activity, the presence of Shiga-toxin-producing Escherichia coli (STEC) and abnormality of the complement system are useful for the diagnosis of TTP, STEC-hemolytic uremic syndrome (HUS)and atypical HUS, respectively. However, there are no specific biomarkers for the diagnosis of DIC. Conclusion Although DIC and TMA are similar appearances, all coagulation, fibrinolysis and platelet systems are activated in DIC, and only platelets are markedly activated in TMA.
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