title: Temporal Bone Pneumatization and Pulsatile Tinnitus Caused by Sigmoid Sinus Diverticulum and/or Dehiscence.
abstract: BACKGROUND
  Although air cells within temporal bone may play an important role in the transmission of pulsatile tinnitus (PT) noise, it has not been studied systematically.
  
  
  OBJECTIVE
  To evaluate the difference in temporal bone pneumatization between PT patients with sigmoid sinus diverticulum and/or dehiscence (SSDD) and healthy people.
  
  
  METHODS
  A total of 199 unilateral persistent PT patients with SSDD and 302 control subjects underwent dual-phase contrast-enhanced CT (DP-CECT), to assess the grade of temporal bone pneumatization in each ear.
  
  
  RESULTS
  In the bilateral temporal bone of 302 controls, 16 ears were grade I, 53 were grade II, 141 were grade III, and 394 were grade IV. Among the affected ears of 199 PT cases, 1 ear was grade I, 18 were grade II, 53 were grade III, and 127 were grade IV. There was no significant difference in the pneumatization grade between the affected PT ear and either ear in the healthy subjects (p > 0.05).
  
  
  CONCLUSIONS
  Although air cells within the temporal bone are an important factor in the occurrence of PT, its severity does not differ significantly from the pneumatization of healthy people.
authors.affiliation: Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China ; Department of Radiology, Jining No. 1 People's Hospital, Shandong 272002, China.
authors.forename: Liu
authors.initials: L
authors.lastname: Wenjuan
authors.affiliation: Department of Radiology, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China.
authors.forename: Liu
authors.initials: L
authors.lastname: Zhaohui
authors.affiliation: Department of Radiology, Jining No. 1 People's Hospital, Shandong 272002, China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Ning
authors.affiliation: Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
authors.forename: Zhao
authors.initials: Z
authors.lastname: Pengfei
authors.affiliation: Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Cheng
authors.affiliation: Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
authors.forename: Wang
authors.initials: W
authors.lastname: Zhenchang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D012809:Colon, Sigmoid / Q000000981:diagnostic imaging / Q000503:physiopathology; D004240:Diverticulum / Q000000981:diagnostic imaging* / Q000503:physiopathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013529:Surgical Wound Dehiscence / Q000000981:diagnostic imaging / Q000503:physiopathology; D013701:Temporal Bone / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery; D014012:Tinnitus / Q000000981:diagnostic imaging* / Q000503:physiopathology; D014057:Tomography, X-Ray Computed