A case of TTP-like illness was defined as microangiopathic hemolytic anemia (hemolytic anemia based on haptoglobin and lactate dehydrogenase and the presence of schistocytes) and thrombocytopenia in a person with a hospital admission platelet count ≤50,000/μL, in the absence of certain known causes of TTP. Here, HP is linked to thrombotic thrombocytopenic purpura.