5 doctors weighed in:

What is the difference between hemophilia a and b?

5 doctors weighed in
Brittany Chan
Pediatrics
4 doctors agree

In brief: Clotting factor.

Hemophilia a results from a deficiency in clotting factor viii.
In contrast, hemophilia b (also called christmas disease) is caused by a deficiency in clotting factor ix. Hemophilia a is more common than hemophilia b, and people with hemophilia a are more likely to suffer from severe disease. It would be impossible to distinguish the two on clinical presentation alone.

In brief: Clotting factor.

Hemophilia a results from a deficiency in clotting factor viii.
In contrast, hemophilia b (also called christmas disease) is caused by a deficiency in clotting factor ix. Hemophilia a is more common than hemophilia b, and people with hemophilia a are more likely to suffer from severe disease. It would be impossible to distinguish the two on clinical presentation alone.
Brittany Chan
Brittany Chan
Answer assisted by Brittany Chan, Medical Student
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