PROLONGED PTT, NORMAL PT (INR): Bleeding Tendency

PROLONGED PTT, NORMAL PT (INR): Bleeding Tendency Bleeding Tendency Long PTT/Normal PT Factor VIII Deficiency D (Hemophilia A) Factor IX Deficiency (Hemophilia B) No Bleeding Tendency Congenital Acquired X-Linked Disorder Autosomal Dominant Disorder Autosomal Recessive Disorder Autoantibodies Drugs Factor XI Deficiency von Willebrand's Disease with a low Factor VIII Factor VIII Inhibitor Other Factors (rare) Heparin Factor XI Deficiency (Hemophilia C)