Hemophilia – Factor VIII or IX Deficiency

Hemophilia A and hemophilia B are bleeding disorders caused by genetic variants in the F8 or F9 gene that result in deficiencies of factor VIII (FVIII) or factor IX (FIX), respectively. These disorders are clinically indistinguishable and present with bleeding symptoms ranging from mild to severe, depending on the underlying defect.

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Last Update: July 2018