Figure 1.
The TMAs. Relationship of the thrombotic microangiopathy lesions. (1) TMAs are designated by thrombocytopenia, hemolysis, and schistocytes on peripheral smear. (2) Alternatively, thrombocytopenia, hemolysis, schistocytes, and renal failure define the HUS syndromes. (3) TTP is theoretically excluded after an assessment of the ADAMTS 13 activity.