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.
Folia Morphol (Warsz). 2023;82(1):187-189. doi: 10.5603/FM.a2022.0007. Epub 2022 Jan 31.
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.
通常情况下，三叉神经和外展神经在中颅窝中行进，位于天幕缘（后岩床韧带）下方，分别位于 Gruber 岩蝶韧带下方的 Dorello 管中。本文报告了一例罕见的单侧解剖变异，在观察一位 56 岁男性患者的脑部计算机断层血管造影时发现了这种变异。在左侧，岩上嵴上方的天幕缘骨化，形成一条 1.96 厘米长的天幕骨，将三叉神经孔转变为完全骨化的孔。在同一侧还发现一条骨化的岩蝶韧带，确定了一个完全骨化的 Dorello 管。在对侧，一条 2.9 毫米长的床突骨从后床突延伸到前床突。尽管这些骨在人类中并不常见，但在伴有三叉神经痛和外展神经麻痹的情况下，应在计算机断层扫描中记录这些骨。
