Anatomical study on endoscopic expanded transnasal approach for clival region

doi:10.13418/j.issn.1001-165x.2025.1.03

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Chinese Journal of Clinical Anatomy ›› 2025, Vol. 43 ›› Issue (1) : 14-17. DOI: 10.13418/j.issn.1001-165x.2025.1.03

Anatomical study on endoscopic expanded transnasal approach for clival region

Yin Du, Cen Bo*, Chen Yang, Dai Liming, Zhou Junge, Hu Fei

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Abstract

Objective To introduce the main anatomical structures of clivus and its adjacent structures, so as to provide guidance for endoscopic expanded transnasal approach for the removal of lesions on the ventral side of clivus and posterior fossa. Methods Anatomical studies were conducted on the heads of six cadavers, with blood vessels filling with red and blue silicone. The main anatomical markers were collected and measured under a microscope and an endoscope, respectively. Results The vertical distance between the upper edge of petrous bone apex and dural foramen of abducens nerve was (3.51±0.62) mm. The distance between posterior clinoid process and dural foramen of abducens nerve was (13.42±1.32) mm, the distance between dural foramen of abducens nerve and glossopharyngeal nerve was (21.53±1.73) mm, and the distance between hypoglossal nerve canal and glossopharyngeal nerve was (25.62±2.24) mm. The glossopharyngeal nerve foramen were (3.73±0.54) mm above the tip of pharyngeal tubercle. The transverse distance between eustachian tube foramen was (23.14±1.15) mm. Conclusions Endoscopic extend transnasal approach is a feasible method for surgical treatment of ventral clival lesions.

Key words

/ Transnasal endoscopic approach / / / / Clivus / / / Posterior cranial fossa / / / Skull base anatomy

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Yin Du, Cen Bo, Chen Yang, Dai Liming, Zhou Junge, Hu Fei. Anatomical study on endoscopic expanded transnasal approach for clival region[J]. Chinese Journal of Clinical Anatomy. 2025, 43(1): 14-17 https://doi.org/10.13418/j.issn.1001-165x.2025.1.03

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