One of the mysteries of the English language finally explained.
A form of haemophilia caused by deficiency of the blood-clotting factor IX rather than the more common factor VIII.
- ‘Despite suffering from haemophilia B, otherwise known as Christmas disease<\em>, the 12-year-old was chosen to receive the Diana, Princess of Wales Memorial Award.’
- ‘Type B haemophilia is also known as the ‘Christmas disease.’’
- ‘Examples include classic hemophilia, Christmas disease (hemophilia B), von Willebrand's disease, Stuart-Prower disease and other clotting factor deficiencies. • Persons with chronic liver disease.’
- ‘Factor IX is used for treating sufferers of Christmas disease, which is a rarer and more serious form of haemophilia (type B).’
- ‘Like hemophilia A, hemophilia B, or factor IX deficiency (also known as Christmas disease), is an X-linked chromosome bleeding disorder.’
1950s: from the name of Stephen Christmas, the first patient examined in detail.
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