Factor X Deficiency

Factor X (10) deficiency is an inherited bleeding disorder caused when a person's body does not produce enough of a protein in the blood (factor X or FX) that helps blood clot or the factor X doesn’t work properly. The disorder is one of the rarest inherited clotting disorders. It affects one in 1,000,000 people. It is found more often in communities where marriage between close relatives is common.

Links to selected resources:

What Is Factor X Deficiency?
(World Federation of Hemophilia)
See the About Bleeding Disorders section. Explains the causes of this blood disorder, its symptoms, diagnosis and treatment.

Factor X deficiency
(Canadian Hemophilia Society, 2006)
This booklet describes factor X deficiency, what causes it, how it is passed on, diagnosis, symptoms, treatments, specific problems for women, healthy living and preventing bleeds.

Factor X deficiency
(National Hemophilia Foundation, USA)

Source: What are rare clotting factor deficiencies? World Federation of Hemophilia, Montreal, Canada, 2009.

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Date last reviewed: 21 September 2020