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Related Experiment Videos

Differences in size and shape between the right and left sigmoid sinuses

H Ichijo1, M Hosokawa, H Shinkawa

  • 1Department of Otolaryngology, Hirosaki University School of Medicine, Japan.

European Archives of Oto-Rhino-Laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery
|January 1, 1993
PubMed
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The sigmoid sinus shape and size may not be affected by middle ear inflammation. Differences in sigmoid sinus anatomy likely originate in fetal development, not from chronic otitis media.

Area of Science:

  • Otolaryngology
  • Radiology
  • Anatomy

Background:

  • The relationship between middle ear inflammation and sigmoid sinus anatomy remains debated.
  • Chronic otitis media can affect surrounding structures, but its impact on the sigmoid sinus is unclear.

Purpose of the Study:

  • To investigate the influence of unilateral chronic otitis media on the shape and cross-sectional area of the sigmoid sinus.
  • To determine if middle ear inflammation causes alterations in sigmoid sinus morphology.

Main Methods:

  • High-resolution computed tomography (CT) scans were used to analyze the sigmoid sinus in 80 patients.
  • Patients had unilateral chronic otitis media affecting either the right or left ear.

Main Results:

Related Experiment Videos

  • A protrusive sigmoid sinus shape was more common on the right side, irrespective of the affected ear.
  • The sigmoid sinus exhibited a significantly larger cross-sectional area on the right compared to the left.

    • Conclusions:

    • Observed side differences in sigmoid sinus anatomy likely stem from fetal development, not acquired middle ear inflammation.
    • Individual variations in sigmoid sinus shape are significant, necessitating temporal bone CT for surgical planning.