Concomitant completely ossified trigeminal pore and Dorello’s canal

Abstract

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Occurrence of the ossification of petrosphenoid ligament: a retrospective radiologic study from computed tomographic images

“…The association of ossified PSL with hypoplasia of the Dorello´s canal [3,4], has explained the mechanism of abducens nerve palsy in several pathological conditions caused by the infection and inflammation of the petrous apex [2]. Contrary to these adverse findings, studies also claimed that the ossified PSL may act as an important anatomical landmark, shielding the abducens nerve by limiting the petrous drilling in skull base surgeries [11] and may protect the structures passing through Dorello's canal as commonly seen in nonhuman primates [17,23]. A study by Ozgur and Esen [20] supported this hypothesis and revealed that the complete or partial ossification of PSL was not associated with abducens nerve palsy as in our study.…”