Thrombotic thrombocytopenic purpura (TTP) and warm-antibody autoimmune hemolytic anemia (AIHA) are uncommon diseases. Although TTP has been increasingly described in association with autoimmune antibodies, there are very few reports of the association with autoimmune hematological conditions, including idiopathic thrombocytopenic purpura and AIHA. Here we describe a patient with classic manifestations of TTP, who was successfully treated with plasma exchange. A few weeks later, she developed warm-antibody AIHA, which responded promptly to prednisone.

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