| 释义 | 
		Definition of Christmas disease in English: Christmas diseasenoun ˈkrɪsməsdɪziːz mass nounA form of haemophilia caused by deficiency of the blood-clotting factor IX rather than the more common factor VIII.  Example sentencesExamples -  Despite suffering from haemophilia B, otherwise known as Christmas disease, the 12-year-old was chosen to receive the Diana, Princess of Wales Memorial Award.
 -  Factor IX is used for treating sufferers of Christmas disease, which is a rarer and more serious form of haemophilia (type B).
 -  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.
 -  Type B haemophilia is also known as the ‘Christmas disease.’
 -  Like hemophilia A, hemophilia B, or factor IX deficiency (also known as Christmas disease), is an X-linked chromosome bleeding disorder.
 
 
 Origin   1950s: from the name of Stephen Christmas, the first patient examined in detail.     |