(C&D) Coronal CT examinations.

<p>it showed their relationship. (FR: foramen rotundum; PSC: Palatosphenoidal Canal (Palatovaginal Canal); VC: vidian nerve).</p

The anatomy step of Meckel Cave.

<p><a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0091444#pone-0091444-g004" target="_blank">Figure 4</a>.4: the position of the front door of vidian canal and vidian nerve; <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0091444#pone-0091444-g004" target="_blank">Figure 4</a>.5: after removal anterior and lateral part of the bone of Meckel cave, Meckel cave which was covered by the dura mater was exposed, the interior and inferior margin of which is the internal carotid artery, lateral side is V2 and V3 branches; <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0091444#pone-0091444-g004" target="_blank">Figure 4</a>.6: Dura mater was resected, Meckel cave was opened. (C: clivis; ICA: internal carotid artery; M: meckel cave; QS: quadrilateral space; SS: sphenoid sinus; V: trigeminal nerve; V2: maxillary branch of the trigeminal nerve; V3: mandibular branch of the trigeminal nerve; VI: abducent nerve; VN: vidian nerve).</p

(A&B) Axial CT examinations.

<p>It showed relationship of foramen rotundum, vidian canal and palatosphenoidal canal (palatovaginal canal). (PPF: pterygomandibular fossa; PC: vidian canal; PSC: Palatosphenoidal Canal (Palatovaginal Canal); VC: vidian nerve).</p