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Folia Morphol (Warsz). 2019 Feb 28. doi: 10.5603/FM.a2019.0019. [Epub ahead of print]

Bilateral giant and unilateral duplicated sphenoidal tubercle.

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The sphenoidal tubercle (SphT), also known as pyramidal tubercle or infratemporal spine projects from the anterior end of the infratemporal crest of the greater sphenoidal wing. As it masquerades the lateral entrance in the pterygopalatine fossa (PPF) it could obstruct surgical corridors or the access for anaesthetic punctures. The SphT is, however, an overlooked structure in the anatomical literature. During a routine Cone Beam Computed Tomography study in an adult male patient we found bilateral giant SphTs transforming the infratemporal surfaces of the greater wing into veritable pterygoid foveae. Moreover, on one side the SphT appeared bifid, with a main giant partition, of 9.17 mm vertical length, and a secondary laminar one. The opposite SphT had 14.80 mm. In our knowledge, such giant and bifid SphTs were not reported previously and are major obstacles if surgical access towards the PPF and the skull base is intended.


cone beam computed tomography; greater wing of the sphenoid bone; infratemporal fossa; maxillary nerve; pterygopalatine fossa

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