Severe haemophilia B (Q89191): Difference between revisions

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Latest revision as of 15:45, 15 August 2026

Severe haemophilia B is a form of haemophilia B (see this term) characterised by a large deficiency of factor IX leading to frequent spontaneous haemorrhage and abnormal bleeding as a result of minor injuries, or following surgery or tooth extraction. Severe haemophilia B accounts for around 40% of all cases of haemophilia B. The biological activity of factor IX is below 1%. Transmission is X-linked recessive and the disorder is caused by mutations in the F9 gene (Xq28) encoding coagulation factor IX.

Language	Label	Description	Also known as
default for all languages	ID_1209364172
English	Severe haemophilia B	Severe haemophilia B is a form of haemophilia B (see this term) characterised by a large deficiency of factor IX leading to frequent spontaneous haemorrhage and abnormal bleeding as a result of minor injuries, or following surgery or tooth extraction. Severe haemophilia B accounts for around 40% of all cases of haemophilia B. The biological activity of factor IX is below 1%. Transmission is X-linked recessive and the disorder is caused by mutations in the F9 gene (Xq28) encoding coagulation factor IX.