TTP=Thrombotic Thrombocytopenic Purpura,  LDH=Lactate dehydrogenase, WBC=White blood cell, AMA=Anti-mitochondrial antibody, ANA=Antinuclear Antibody, GI=Gastrointestinal, ADAMTS13=A Disintegrin And Metalloproteinase with Thrombospondin type 1 motif, member 13, N/A=Not Applicable, (-)=negative, (+)=positive. The gene discussed is ADAMTS13; the disease is thrombotic thrombocytopenic purpura.