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Free Content Raiders of the Lost Canal: Review of Underrecognized Skull Base Canals, Fissures, and Foramina

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The anatomy of the skull base is complex and poses a daunting challenge to many radiologists and trainees. In addition to knowing major skull base passages, there are several underrecognized skull base canals, foramina, and fissures that are critical to avoid misdiagnosis, understand the spread of disease, and guide surgical management. A review of the current literature on these forgotten structures yielded numerous original articles and a few review articles, none of which were comprehensive. This article aimed to fill that void. We provide a comprehensive review of underrecognized skull base anatomic structures and their content and discuss their clinical implications.

Learning Objective: Recognize uncommon skull base structures, their content, and their clinical implications
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Keywords: AEA = anterior ethmoidal artery; AEC = anterior ethmoidal canal; CBM = canalis basilaris medianus; CPC = craniopharyngeal canal; EAC = external auditory canal; FNM = fossa navicularis magna; ITC = inferior tympanic canaliculus; MEV = mastoid emissary vein; MMA = middle meningeal artery; PEA = posterior ethmoidal artery; PVC = palatovaginal canal; SAC = subarcuate canal; VC = Vidian canal

Document Type: Research Article

Publication date: December 1, 2021

More about this publication?
  • Neurographics is the peer-reviewed, bimonthly educational journal of the American Society of Neuroradiology. The journal comprises articles selected from material presented at the ASNR Annual Meeting. Neurographics also publishes other high-quality submissions that are primarily educational and have a high emphasis on a pictorial approach. Neurographics offers CME credit for reading review articles and completing quiz-based self-assessment activities.

    Visit the ASNR Education Connection to view all available CME courses.

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