由于HUS与血栓性血小板减少性紫癜（thromboticthrombocytopenicpurpura，TTP）在病因、发病机制、病理改变和临床表现方面难以精确区分，目前越来越多的学者认为两者是同一疾病不同的临床表现，可统称之为HUS/TTP或血栓性微血管病（thromboticmicroangiopathy，TMA）。
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