Hemophilia B

  • Hemophilia B is an inherited disorder of bleeding and is the result of congenital deficiency of Factor IX. Hemophilia B is inherited in an X-linked recessive pattern and although much less common, is clinically identical to Hemophilia A. Consequently, patients display a tendency to bruise easily, suffer from significant hemorrhage following operations, and develop recurrent spontaneous hemarthroses of the large joints. Because Factor IX is present within the intrinsic arm of the coagulation cascade, patients with Hemophilia B display an abnormally long PTT.
  • In order to mentally associate Hemophilia B with Factor IX it might be helpful to think of the work "Benign" or in other words: B-9.