(Hemophilia A — Factor VIII Deficiency; Classic Hemophilia; Hemophilia B — Factor IX Deficiency; Christmas Disease)
Hemophilia – Definition
Hemophilia is a group of bleeding disorders. It is caused by low amounts of specific clotting factors. These factors help to stop bleeding.
The most common types of hemophilia are:
- Hemophilia A (classic hemophilia) — accounts for 80% of all hemophilia (1 in 5,000 males), caused by too little factor VIII
- Hemophilia B (Christmas disease) — occurs in 1 in 25,000 males, caused by too little factor IX