There are different levels of hemophilia B — mild, moderate, and severe. It is important to know the level, since determining the proper treatment will depend on severity of the condition.
Mild hemophilia B
People with mild hemophilia have a 6% to 49% level of factor IX in their blood. Mild hemophilia B usually causes problems with bleeding only after serious injury, trauma, or surgery. In many cases, mild hemophilia B is not discovered until there is unusual bleeding after an injury, surgery or tooth extraction. It is possible that the first episode will not occur until adulthood.
Moderate hemophilia B
People with moderate hemophilia make up about 15% of the hemophilia population. Moderate hemophilia B tends to result in bleeding episodes after injuries. People with moderate hemophilia B may also have sporadic bleeding episodes without obvious cause. These are referred to as "spontaneous bleeding episodes".
Severe hemophilia B
About 60% of the hemophilia A population has severe hemophilia. People with severe hemophilia can have bleeding following an injury and may experience frequent spontaneous bleeding episodes, often into the joints and muscles.
Last Updated:
6/29/2009 11:58 AM