title: Familial non-syndromal thoracic aortic aneurysms and dissections - Incidence and family screening outcomes.
abstract: BACKGROUND
  Non-syndromal thoracic aortic aneurysm and dissection (ns-TAAD) is a genetic aortopathy, with uncertain incidence. This study documented the incidence of ns-TAAD and outcomes of family screening over 15years.
  
  
  METHODS
  Consecutive series of 2385 patients with aortic disease in prospective registry (2000 to 2014), including 675 undergoing surgery. Diagnosis of ns-TAAD included family history, aortic imaging, tissue pathology and mutation testing. Screening was offered to relatives of ns-TAAD probands, with follow-up for affected individuals.
  
  
  RESULTS
  There were 270 ns-TAAD probands (74% males), including 116 (43%) presenting with aortic dissection. Among surgical cases, a diagnosis of ns-TAAD was established for 116 (17%). Age of probands was 50.4±14.1years, with aortic diameter of 51±12mm. Screening of 581 at-risk relatives identified 216 new ns-TAAD cases (detection rate=37%). Among 71 probands with known family history, screening identified 130 new affected relatives and among 53 probands with no family history, screening identified 86 new affected relatives. Mean age of new affected relatives at diagnosis was 44±18years, with aortic diameter of 42±7mm, including 42 with diameter>50mm. Ten-year mortality was similar for probands without dissection (7.7±3.1%) and new affected relatives (11.4±4.0%) but greater for probands surviving initial dissection (27.6±7.8%, p=0.003).
  
  
  CONCLUSIONS
  Up to 1 in 6 patients undergoing aortic surgery have features of ns-TAAD, frequently presenting as aortic dissection but at later age than other genetic aortopathies. Family screening identifies affected relatives in up to half of ns-TAAD probands, many of whom already have significant aortic dilatation.
authors.affiliation: Sydney Medical School, University of Sydney, Australia.
authors.forename: Elizabeth N
authors.initials: EN
authors.lastname: Robertson
authors.affiliation: Sydney Medical School, University of Sydney, Australia.
authors.forename: Denise
authors.initials: D
authors.lastname: van der Linde
authors.affiliation: Sydney Medical School, University of Sydney, Australia; The Baird Institute, Royal Prince Alfred Hospital, Sydney, Australia.
authors.forename: Andrew G
authors.initials: AG
authors.lastname: Sherrah
authors.affiliation: Sydney Medical School, University of Sydney, Australia; The Baird Institute, Royal Prince Alfred Hospital, Sydney, Australia; Australian School of Advanced Medicine, Macquarie University, Australia.
authors.forename: Michael P
authors.initials: MP
authors.lastname: Vallely
authors.affiliation: The Baird Institute, Royal Prince Alfred Hospital, Sydney, Australia; Australian School of Advanced Medicine, Macquarie University, Australia.
authors.forename: Michael
authors.initials: M
authors.lastname: Wilson
authors.affiliation: Sydney Medical School, University of Sydney, Australia; The Baird Institute, Royal Prince Alfred Hospital, Sydney, Australia.
authors.forename: Paul G
authors.initials: PG
authors.lastname: Bannon
authors.affiliation: Sydney Medical School, University of Sydney, Australia; The Baird Institute, Royal Prince Alfred Hospital, Sydney, Australia. Electronic address: Richmond.jeremy@sydney.edu.au.
authors.forename: Richmond W
authors.initials: RW
authors.lastname: Jeremy
mesh_terms: D000328:Adult; D000368:Aged; D000784:Aortic Dissection / Q000175:diagnosis* / Q000453:epidemiology* / Q000235:genetics; D017545:Aortic Aneurysm, Thoracic / Q000175:diagnosis* / Q000453:epidemiology* / Q000235:genetics; D015331:Cohort Studies; D005190:Family; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D008297:Male; D008403:Mass Screening / Q000379:methods*; D008875:Middle Aged; D011446:Prospective Studies; D012042:Registries; D055815:Young Adult
keywords: Aortic dissection; Aortic surgery; Familial aortic disease; Prognosis