You may hear hemorrhaging disorders referred to as hemophilia, which is a set of the most well known bleeding disorders. Hemophilia refers to the blood's inability to clot because of low or no levels of specific clotting factors. Hemophilia can be classified as hemophilia A, hemophilia B, or hemophilia C. Each type of hemophilia refers to a lack of a particular clotting factor, represented by roman numerals. Hemophilia A refers to a factor VIII deficiency, hemophilia B (also known as Christmas disease) refers to a lack of factor IX, and hemophilia C, which is rare in the US, refers to a lack of factor XI. Other hemorrhaging disorders exist, but are less common.
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