The main differential diagnostic possibilities include thrombotic thrombocytopenic purpura (TTP), which is defined by ADAMTS13 deficiency [1–3] [(a disintegrin and metalloprotease with thrombospondin type 1 domains, member 13 of the family) and hemolytic uremic syndrome (HUS) with multiple potential etiologies [4]. The gene discussed is ADAMTS13; the disease is thrombotic thrombocytopenic purpura.