title: Preoperative CT diagnosis of right nonrecurrent inferior laryngeal nerve.
abstract: BACKGROUND
  The nonrecurrent inferior laryngeal nerve is an anomaly associated with the absence of the brachiocephalic artery (BCA) and the presence of arteria lusoria.
  
  
  METHODS
  The preoperative CT scans from 290 patients (9 nonrecurrent, 281 recurrent) were retrospectively reviewed. We identified the BCA or the arteria lusoria, and classified the relationship between the right subclavian artery (SCA) and the tracheoesophagus into 2 subtypes.
  
  
  RESULTS
  The arteria lusoria was identified in 6 nonrecurrent cases. The BCA was identified in 143 recurrent cases. The right SCA was detected on the ventral side of the membranous wall of the trachea in 273 recurrent cases, whereas it was detected on the dorsal side in 8 recurrent cases with enlarged thyroid, and it was detected on the dorsal side in 9 nonrecurrent cases without pressure sign.
  
  
  CONCLUSIONS
  It is possible to predict a nonrecurrent inferior laryngeal nerve by identifying the arteria lusoria or other features on the preoperative CT.
authors.affiliation: Department of Head and Neck Surgery, Cancer Hospital, Fudan University, Shanghai, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Qinghai
authors.initials: Q
authors.lastname: Ji
authors.forename: Duanshu
authors.initials: D
authors.lastname: Li
authors.forename: Yi
authors.initials: Y
authors.lastname: Wu
authors.forename: Yongxue
authors.initials: Y
authors.lastname: Zhu
authors.forename: Caiping
authors.initials: C
authors.lastname: Huang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Shen
authors.forename: Zhuoying
authors.initials: Z
authors.lastname: Wang
authors.forename: Ling
authors.initials: L
authors.lastname: Zhang
authors.forename: Tuanqi
authors.initials: T
authors.lastname: Sun
mesh_terms: D000328:Adult; D016122:Brachiocephalic Trunk / Q000002:abnormalities / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008875:Middle Aged; D011237:Predictive Value of Tests; D057234:Preoperative Period; D012009:Recurrent Laryngeal Nerve / Q000002:abnormalities / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D013348:Subclavian Artery / Q000002:abnormalities / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed