title: Lateral hump anomaly of pyramid segment of facial nerve in living patients.
abstract: CONCLUSIONS
  A lateral hump anomaly of the pyramid segment of the facial nerve deserves special attention during otologic surgery. Coronary high-resolution CT (HRCT) reconstruction of temporal bone was highly valuable in preoperative detection of the anomaly.
  
  
  OBJECTIVE
  This study aimed to investigate lateral hump anomaly of the pyramid segment of the facial nerve in adult patients and assess the value of coronary HRCT reconstruction of the temporal bone in preoperative detection of the anomaly.
  
  
  METHODS
  We carried out a prospective study in 439 Han Chinese adults who underwent unilateral facial nerve decompression due to Bell's palsy in our department between April 2005 and October 2012, focusing on lateral hump anomaly of the pyramid segment of the facial nerve, detection sensitivity, and accuracy of coronary HRCT reconstruction of the temporal bone.
  
  
  RESULTS
  Lateral hump anomaly of the pyramid segment was observed in 21 cases (4.83%) undergoing surgery. The detection sensitivity and accuracy of coronary HRCT reconstruction were both 100%.
authors.affiliation: Department of Otolaryngology Head and Neck Surgery, The Ninth Medical College of Peking University, Beijing, China.
authors.forename: Chuanfu
authors.initials: C
authors.lastname: Dai
authors.forename: Jiandong
authors.initials: J
authors.lastname: Li
authors.forename: Liang
authors.initials: L
authors.lastname: Zhao
authors.forename: Yongliang
authors.initials: Y
authors.lastname: Liu
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.forename: Zhiyao
authors.initials: Z
authors.lastname: Song
authors.forename: Shui
authors.initials: S
authors.lastname: Feng
authors.forename: Jieyu
authors.initials: J
authors.lastname: Lu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D063405:Anatomic Variation; D005154:Facial Nerve / Q000002:abnormalities* / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D013701:Temporal Bone / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed; D055815:Young Adult