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All About Bleeding

Hemophilia B

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European Commission Approves IDELVION®

11 May 2016 - CSL Behring’s Novel Hemophilia B Treatment with Up to 14-day Dosing Intervals

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IDELVION® for Hemophilia B Now Available in US

21 March 2016 - Long-acting recombinant Factor IX

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Novel Recombinant Hemophilia Treatments

CSL Behring’s recombinant factor development pipeline is built on its strength in protein research and development and scientific expertise in bleeding disorders

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Hemophilia B, also known as Christmas disease, is the second most common type of hemophilia, affecting about 20% of people with hemophilia. It is typically an inherited bleeding disorder that results from a deficiency of Factor IX.

Symptoms of Hemophilia B

Like hemophilia A, people born with hemophilia B are usually male, because the gene is located on the X-chromosome. Females have two X-chromosomes, one of which is usually a healthy X-chromosome, which compensates for a potentially defective Factor IX gene on the other (however, this makes them carriers of hemophilia B). This compensation does not work in males, who have an only X-chromosome and a Y-chromosome. The symptoms of hemophilia B may vary from almost none to frequent spontaneous bleedings.

The most common symptoms of hemophilia B are:
  • Hematomas (for example, an infant born with hemophilia B may bruise simply from being lifted)
  • Bleeding in the mouth from a cut or bite or from losing a tooth
  • Hemarthosis (tightness, swelling, warmth and/or pain in the joints
  • Bleeding into soft tissues
  • Heavy bleeding from a minor cut
  • Cuts that bleed again after they have already stopped for a short time
  • Gastrointestinal, genitourinary, or intracranial bleeding

Learn more about treatment options for hemophilia B:

Package Inserts

Product Websites

IDELVION.com (United States)

Not all products are available in every country. To learn what products are available in your country, visit your CSL Behring country site.


Last Updated: 4/13/2016 4:00 PM
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