ADAMTS13 and thrombotic thrombocytopenic purpura: The primary types of TMA include thrombotic thrombocytopenic purpura (TTP), which results from an inherited or acquired deficiency of ADAMTS13, typical hemolitic uremic syndrome, which is caused by Shiga toxin-producing Escherichia coli (STEC-HUS), and all other forms, which are grouped under the common term atypical hemolitic uremic syndrome (aHUS) [7].