title: Thrombophilic families with inheritably associated high levels of coagulation factors VIII, IX and XI.
abstract: We describe six families in which associated high levels of coagulation factors (F) XI, FIX and FVIII (each with a plasma concentration higher than the 95th percentile found in a control group of 500 asymptomatic individuals: respectively, 135, 145 and 155 IU dL-1) were inherited as a dominant autosomic genetic traits. In these six families, this syndrome is associated with venous thromboembolic events (Odds ratio 41 [4.9-353], P = 0.0006). It seems to predispose to idiopathic events and, as age increases, is often associated with recurrence. First thrombotic episodes occur in young patients (50% of the carriers are symptomatic at the age of 32 years) and in women, can be unmasked by hormonal treatments, mainly oral contraceptives. The association of high levels of coagulation FXI, FIX and FVIII is thus a new rare high-risk inherited thrombophilia syndrome.
authors.affiliation: Laboratoire d'Hématologie, University Hospital G. Doumergue, Rue Hoche, F-30029 Nîmes cedex 09, France. geraldinelavigne@hotmail.com
authors.forename: G
authors.initials: G
authors.lastname: Lavigne
authors.forename: E
authors.initials: E
authors.lastname: Mercier
authors.forename: I
authors.initials: I
authors.lastname: Queré
authors.forename: M
authors.initials: M
authors.lastname: Dauzat
authors.forename: J-C
authors.initials: JC
authors.lastname: Gris
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000925:Anticoagulants / Q000627:therapeutic use; D018572:Disease-Free Survival; D005164:Factor IX / Q000096:biosynthesis*; D005169:Factor VIII / Q000096:biosynthesis*; D005172:Factor XI / Q000096:biosynthesis*; D005192:Family Health; D005260:Female; D005799:Genes, Dominant; D006801:Humans; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D010375:Pedigree; D011486:Protein C / Q000096:biosynthesis; D017293:Protein S / Q000096:biosynthesis; D013923:Thromboembolism / Q000235:genetics*; D019851:Thrombophilia / Q000235:genetics*; D013997:Time Factors
chemical_list: D000925:Anticoagulants; D011486:Protein C; D017293:Protein S; D005169:Factor VIII; D005164:Factor IX; D005172:Factor XI