[Disorders of hemostasis in dysthyroidism].

Many potentially severe hemostatic disorders have been reported in thyroid diseases. Hyperthyroidism has been associated with thrombocytopenia, coagulation factor abnormalities, and decreased fibrinolytic and plasminogen activities. In hypothyroidism, potentially severe hemorrhagic disorders have been reported, including platelet function abnormalities and coagulation factor alterations such as acquired von Willebrand disease.