Knowledge Check
Sort lab test (top) according to whether it is typically altered in TTP or not (bottom):
Schistocytes on smear
Low haptoglobin
Spur cells in smear
Low ADAMTS13
Elevated LDH
Elevated direct bilirubin
Positive DAT
Elevated PT and/or aPTT
Stool positive for Shiga toxin
Elevated AST
Increased reticulocytes
Elevated ADAMTS13
Elevated ALT
Altered in TTP
Not altered in TTP
Abbreviations: TTP, thrombotic thrombocytopenic purpura; LDH, lactate dehydrogenase; DAT, direct antiglobulin test; PT, prothrombin time; aPTT, activated partial thromboplastin time.
