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Normal Variant Occipital Pneumatization.

Courtney M Tomblinson1, Nicholas L Deep2, Geoffrey P Fletcher1

  • 1Department of Radiology.

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
|August 7, 2018
PubMed
Summary
This summary is machine-generated.

Occipital pneumatization (OP) affects 11.8% of individuals, with air cells typically near the occipitomastoid suture. This common finding is a normal variant, unlike rare craniocervical pneumatization.

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Area of Science:

  • Anatomy
  • Radiology
  • Skull Base

Background:

  • Pneumatization, the presence of air cells, is common in the skull base.
  • Occipital pneumatization (OP) is an accessory pneumatization site within the occipital bone.
  • The prevalence and anatomical patterns of OP require further characterization.

Purpose of the Study:

  • To evaluate the prevalence and anatomical patterns of occipital pneumatization (OP).
  • To differentiate OP from craniocervical pneumatization.

Main Methods:

  • Retrospective analysis of 1000 high-resolution computed tomography (CT) scans of the temporal bone.
  • Assessment for the presence and characteristics of occipital pneumatization.

Main Results:

  • Occipital pneumatization (OP) was identified in 11.8% of individuals.
  • Occipital condyle pneumatization was rare (0.3%).
  • OP air cells demonstrated a left-sided predilection and were contiguous with the occipitomastoid suture.

Conclusions:

  • Occipital pneumatization (OP) is a common finding, present in 11.8% of the population studied.
  • OP is a normal anatomical variant, distinct from rare craniocervical pneumatization.
  • The findings suggest OP originates from the mastoid air cells.