Christmas disease(redirected from haemophilia B)
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Related to haemophilia B: haemophilia A, Hæmophilia A, Haemophilia C
Christmas disease[′kris·məs di‚zēz]
A hereditary, sex-linked, hemophilia-like disease involving failure of the clotting mechanism due to a deficiency of Christmas factor. Also known as Factor IX deficiency.