Hemophilia A pathophysiology
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Fahd Yunus, M.D. [2]
Overview
The pathogenesis of Hemophilia A is characterized by genetic deficiency in Factor VIII.
Pathophysiology
- The F8 gene associated with the development of Hemophilia A is located close to the tip Xq, and affects production of clotting factor VIII. Abnormalities in the F8 gene cause a relative deficiency in factor VIII, resulting in improper hemostasis and abnormal or excessive bleeding. [1]
- This trait is inherited in an X-linked recessive manner, affecting males and homozygous females (very rare).
- One-third of new cases of Hemophilia A are due to spontaneous mutations in the X chromosome, not inherited from either parent.
- In rare cases, individuals may develop hemophilia later in life. This acquired form of the disease results from development of antibodies to factor VIII. [2]
References
- ↑ Konkle BA, Josephson NC, Nakaya Fletcher S. Hemophilia A. 2000 Sep 21 [Updated 2014 Jun 5]. In: Pagon RA, Adam MP, Ardinger HH, et al., editors. GeneReviews® [Internet]. Seattle (WA): University of Washington, Seattle; 1993-2016. Available from: http://www-ncbi-nlm-nih-gov.laneproxy.stanford.edu/books/NBK1404/
- ↑ Handbook of Genetic Counseling/Hemophilia and Von Willebrand Disease – Wikibooks, open books for an open world. Available at https://en.wikibooks.org/wiki/Handbook_of_Genetic_Counseling/Hemophilia_and_Von_Willebrand_Disease Accessed on July 30,2016