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Related Experiment Videos

The posterior condylar canal

L E Ginsberg1

  • 1Department of Radiology, Bowman Gray School of Medicine, Winston-Salem, NC 27157-1088.

AJNR. American Journal of Neuroradiology
|May 1, 1994
PubMed
Summary

The posterior condylar canal, a large emissary foramen, was identified in 81% of temporal bone CT scans. Recognizing this venous drainage pathway aids accurate interpretation of CT images.

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Area of Science:

  • Anatomy
  • Radiology
  • Neuroimaging

Background:

  • The posterior condylar canal (PCC) is an emissary foramen.
  • Its role in venous drainage from the brain is significant.
  • Accurate identification is crucial for diagnostic imaging.

Purpose of the Study:

  • To determine the prevalence of the posterior condylar canal.
  • To describe the imaging appearance of the PCC on high-resolution CT.
  • To assess its anatomical variations.

Main Methods:

  • Retrospective review of 123 high-resolution temporal bone CT scans.
  • Examination of 34 gross human skulls.
  • Analysis of PCC presence, absence, and laterality.

Main Results:

  • PCC identified on CT in 31% bilaterally and 50% unilaterally.
  • PCC identified in 55.9% of gross specimens bilaterally and 17.6% unilaterally.
  • PCC is identifiable in a predictable location, with appearance varying based on scan angle.

Conclusions:

  • The posterior condylar canal is a major emissary foramen.
  • Understanding its anatomy and venous drainage function prevents misinterpretation on CT.
  • High-resolution CT is effective for visualizing the PCC.

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