74-year-old female evaluated for pancytopenia of unknown etiology, which required blood transfusions. Bone marrow aspirate and biopsy showed a hypocellular bone marrow with trilineage maturation. The treatment include immunosuppressive agents and erythropoietin.

15 years old patient presented with clinical syndrome of fever, fatigue, and diarrhea. Laboratory findings showed severe anemia with findings of microangiopathic hemolysis (schistocytes, hyperbilirubinemia, elevated LDH) and severe thrombocytopenia. He was later documented to have fluctuating ADAMTS13 activity that appeared to correlate with the hematologic abnormalities. He also had urinary findings of hematuria, moderate proteinuria, and creatinine as high as 1.4 mg/dL.