This document discusses various disorders of coagulation and hemostasis. It describes the normal physiologic mechanisms of hemostasis, coagulation pathways, and fibrinolysis. It then discusses several specific bleeding disorders including von Willebrand disease, hemophilia, disseminated intravascular coagulation (DIC), thrombotic thrombocytopenic purpura (TTP), immune thrombocytopenic purpura (ITP), and qualitative platelet defects. Laboratory tests used to evaluate coagulation and bleeding disorders are also outlined.