Step 1 → Hematology and Oncology Clotting Disorders and ThrombophiliasPreview this topic sectionPreview the conditions. Plans unlock the full Step 1 details when you need them. Free Biochemistry Free Microbiology Plans Clotting Disorders and Thrombophilias conditions Antithrombin Deficiency Disseminated Intravascular Coagulation (DIC) Factor V Leiden Hemophilia A, B, or C Protein C or S Deficiency Prothrombin G20210A Mutation