What is Hemophilia B?
Hemophilia B (or Christmas disease) is less common than hemophilia A and results when the person does not have enough clotting factor IX. Although hemophilia B is usually inherited, about 30% of cases are caused by a spontaneous mutation in the person’s own genes.
Hemophilia B affects about 1 in 50,000 people and is diagnosed by taking a blood sample and measuring the level of factor activity in the blood.
Hemophilia B can be mild, moderate, or severe, depending on how much clotting factor is in an affected person's blood. However, about 60% of patients have the severe form of the disorder. People with hemophilia B have prolonged bleeding after an injury, surgery, or tooth extraction. In severe cases, they may bleed once or twice a week and often the bleeding is spontaneous, which means it happens for no obvious reason. Serious complications can result from bleeding into the joints, muscles, brain, or other internal organs. See how bleeds, infusions and Factor IX levels may be affecting you more than you think. In mild case of hemophilia B, the disorder may remain unknown until after a surgery or serious injury.
Treatment for hemophilia B is very effective and with appropriate treatment and care, people with hemophilia B can live perfectly normal lives. The main treatment is called replacement therapy, during which clotting factor IX is infused into a vein either prophylactically (preventatively) or on-demand to prevent or treat bleeds.
Living (and Thriving) with Hemophilia B
"Don't be scared to live your life. Don't let hemophilia hold you back." These inspiring words came from college-bound hemophilia B patient Michael Joshua.Watch his story
Here is a sampling of our Vita stories on Hemophilia:
To read all of our stories, please visit our Vita homepage.
What is hemophilia?
The inherited bleeding disorder is explained in CSL Behring's original animation.
Not letting hemophilia hold him back
As he prepares to head off to college, Michael is dreaming big and isn't letting his rare disease hold him back.
Hemophilia and hypertension: A curious connection
People living with hemophilia are more likely to develop hypertension at a younger age.
Resources for you
Availability of treatments may vary from country to country. Please be sure to visit your local CSLBehring.com site for further information.