What is hemophilia B?
Hemophilia B is a genetic bleeding disorder caused by a change in a gene on the X chromosome. This causes a lack or shortage of the Factor IX (FIX) protein in the blood. This protein is supposed to help form clots to stop bleeding after an injury. People who lack this protein often bleed longer than others and require medicine to stop bleeding. They can have internal bleeding (bleeding inside their body) without any kind of injury. They also tend to have bleeding in their joints and muscles. People with a severe type of hemophilia B have more bleeding symptoms than people with a mild type. Additional information about the signs and symptoms of hemophilia B can found found at the here: The Coalition for Hemophilia B FAQ website. Detailed information on Hemophilia B from its genetic cause to expert treatment recommendations written for healthcare practitioners is available at the GeneReviews on Hemophilia B website.
SOURCE: Emory University - Department of Human Genetics in collaboration with ThinkGenetic • https://www.thinkgenetic.com/diseases/hemophilia-b/overview/6595 • DATE UPDATED: 2016-07-04
GeneReviews, Hemophilia B, http://www.ncbi.nlm.nih.gov/books/NBK1495/
Coalition for Hemophilia B, http://hemob.org/