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Concomitant completely ossified trigeminal pore and Dorello’s canal
, 1, 2, 2
Affiliations- Division of Anatomy, Faculty of Dental Medicine, “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania
- Faculty of General Medicine, “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania
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Abstract
Commonly, the trigeminal and abducens nerve course to the middle cranial fossa, beneath the tentorial border (posterior petroclinoid dural ligament) and, respectively, beneath Grüber’s petrosphenoidal ligament, in Dorello’s canal. It is hereby reported a rare unilateral association of anatomic variants which was found when the brain computed tomography angiography of a 56-year-old male patient was observed. On the left side, the tentorial border was ossified above the petrous apex, resulting in a tentorial bar 1.96 cm long that transformed the trigeminal pore into a completely ossified one. On that side was also found an ossified petrosphenoidal ligament determining a completely ossified Dorello’s canal. On the opposite side a 2.9 mm long clinoid bar extended from the posterior clinoid process to the anterior one. Although these bars are not common in humans they should be documented in computed tomography in cases with associated trigeminal neuralgia and abducens nerve palsy.
Abstract
Commonly, the trigeminal and abducens nerve course to the middle cranial fossa, beneath the tentorial border (posterior petroclinoid dural ligament) and, respectively, beneath Grüber’s petrosphenoidal ligament, in Dorello’s canal. It is hereby reported a rare unilateral association of anatomic variants which was found when the brain computed tomography angiography of a 56-year-old male patient was observed. On the left side, the tentorial border was ossified above the petrous apex, resulting in a tentorial bar 1.96 cm long that transformed the trigeminal pore into a completely ossified one. On that side was also found an ossified petrosphenoidal ligament determining a completely ossified Dorello’s canal. On the opposite side a 2.9 mm long clinoid bar extended from the posterior clinoid process to the anterior one. Although these bars are not common in humans they should be documented in computed tomography in cases with associated trigeminal neuralgia and abducens nerve palsy.
Keywords
trigeminal nerve, abducens nerve, trigeminal neuralgia, petrous apex
About this articleTitle
Concomitant completely ossified trigeminal pore and Dorello’s canal
Journal
Issue
Article type
Case report
Pages
187-189
Published online
2022-01-21
Page views
3535
Article views/downloads
1505
DOI
Pubmed
Bibliographic record
Folia Morphol 2023;82(1):187-189.
Keywords
trigeminal nerve
abducens nerve
trigeminal neuralgia
petrous apex
Authors
M. C. Rusu
A. D. Vrapciu
P. M. Rădoi
C. Toader
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