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Hemophilia B

What is Hemophilia B?

Hemophilia B is a less common type of hemophilia. It is caused by a mutation in the gene that makes clotting factor 9 (IX). Hemophilia B makes it hard for the blood to clot, so people often spontaneously bleed or bleed for a long time after an injury. About 3 in 10 people with hemophilia have type B.(1)

Other condition names

  • Christmas disease
  • Factor IX deficiency

Inheritance type

X-linked recessive

Prevalence

  • Europe: 1-9 in 100,000

Age of Onset

  • Childhood
  • Infancy
  • Neonatal

  1. What is Hemophilia? Centers for Disease Control and Prevention. Available at https://www.cdc.gov/ncbddd/hemophilia/facts.html. Accessed 12/8/2022.

Orphadata: Free access data from Orphanet. © INSERM 1999. Available on "https://www.orphadata.com". Data version 1.3.16 / 4.1.7.