The nurse is assessing an adolescent with von Willebrand disease. She complains of epistaxis and heavy menstrual blood flow. What is likely the cause of this disease?
•Von Willebrand disease is the most common hereditary coagulation disorder, characterized by a deficiency of von Willebrand factor, a protein required for platelet adhesion.
•Hemophilia B is caused by a deficiency of factor IX.
•Hemophilia A is caused by a deficiency of factor VIII.
•Hemophilia C is caused by a deficiency of factor XI.