title: [Angiographic evaluation of branching pattern and anatomy of the aortic arch].
abstract: OBJECTIVE
  The study aimed to investigate anatomical variations in branching pattern and anatomy of the aortic arch, and the prevalence of each type.
  
  
  METHODS
  Between September 2011 and November 2013, angiographic studies of 270 patients (144 male, 126 female) were analyzed retrospectively for variations in branching pattern and anatomy of the aortic arch. Patient mean age was 59.8 years (range, 13-88). Branching variations were found and divided into subtypes. Patients were also classified according to arch anatomy. Incidence of variations and types of aortic arch were statistically analysed.
  
  
  RESULTS
  Analysis of the 270 patients revealed six types of branching pattern. Type I, classical pattern arch with three branches (TB, LCC, LS), was observed in 198 cases (73.3%). Type II (bovine arch), the most commonly observed variation, in which LCC originates from TB, was observed in 58 cases (21.5%). Type III, in which the left vertebral artery arises from the arch, was seen in seven cases (2.6%). Type IV, a combination of types II and III, was observed in three cases (1.1%). Type V, common origin of common carotids, LS and aberrant RS, was found in three cases (1.1%). Type VI (avian type), arch with only two branches, was observed in one case (0.4%). When patients were classified according to aortic arch anatomy, Type 1, Type 2 and Type 3 were observed in 195, 40 and 35 patients respectively.
  
  
  CONCLUSIONS
  Knowledge of the variations and anatomy of the aortic arch is essential during interventional procedures and neck-thorax surgery.
authors.affiliation: Department of Radiology, Dışkapı Yıldırım Beyazı Training and Research Hospital, Ankara, Turkey. onurergun@yahoo.com.
authors.forename: Onur
authors.initials: O
authors.lastname: Ergun
authors.affiliation: Department of Radiology, Dışkapı Yıldırım Beyazı Training and Research Hospital, Ankara, Turkey.
authors.forename: İdil Güneş
authors.initials: İG
authors.lastname: Tatar
authors.affiliation: Department of Radiology, Dışkapı Yıldırım Beyazı Training and Research Hospital, Ankara, Turkey.
authors.forename: Erdem
authors.initials: E
authors.lastname: Birgi
authors.affiliation: Department of Radiology, Dışkapı Yıldırım Beyazı Training and Research Hospital, Ankara, Turkey.
authors.forename: Hasan Ali
authors.initials: HA
authors.lastname: Durmaz
authors.affiliation: Department of Radiology, Dışkapı Yıldırım Beyazı Training and Research Hospital, Ankara, Turkey.
authors.forename: Seray
authors.initials: S
authors.lastname: Akçalar
authors.affiliation: Department of Radiology, Dışkapı Yıldırım Beyazı Training and Research Hospital, Ankara, Turkey.
authors.forename: Aydın
authors.initials: A
authors.lastname: Kurt
authors.affiliation: Department of Radiology, Dışkapı Yıldırım Beyazı Training and Research Hospital, Ankara, Turkey.
authors.forename: Baki
authors.initials: B
authors.lastname: Hekimoğlu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001013:Aorta, Thoracic / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D055815:Young Adult