Haemophilia B is an X-linked disorder with an incidence of 1 in 25000 males. There are no common molecular defects in the FIX gene. The molecular defects observed are missense variants, gross deletions/duplications. These are screened initially by DNA sequencing; and if negative, fragment analysis is performed.
References
- Rossetti et al., Clinical Chemistry, Volume 51, Issue 7, 1 July 2005, Pages 1154–1158.
- Bagnall et al., Blood (2002) 99 (1): 168–174.
- Wang et al., J Thromb Thrombolysis, 2020 May;49(4):591-601