Anterior petrosal approach: The safety of Kawase triangle as an anatomical landmark for anterior petrosectomy in petroclival meningiomas

Hamid Borghei-Razavi, Ryosuke Tomio, Seyed Mohammad Fereshtehnejad, Shunsuke Shibao, Uta Schick, Masahiro Toda, Takeshi Kawase, Kazunari Yoshida

研究成果: Article査読

21 被引用数 (Scopus)

抄録

Object Anterior petrosectomy through the middle fossa is a well-described option for addressing cranial base lesions of the petroclival region. To access posterior fossa through middle fossa, we quantitatively evaluate the safety of Kawase triangle as an anatomical landmark. Method We reviewed pre- and postoperative Multi-Slice CT scan (1 mm thickness) of patients with petroclival meningioma between Jan 2009 and Sep 2013 in which anterior petrosectomy was performed to access the posterior fossa part of the tumor. The distances between drilling start and finish edge to the vital anatomical skull base structures such as internal auditory canal (IAC) and superior semicircular canal and petrous apex (petrous part of the carotid artery) were measured and analyzed. Results Drilling entrance length is directly related with tumor size. The distances between anatomical structures and drilling points decrease with increasing tumor size, but it always remains a safe margin between drilling points and IAC, internal carotid artery (ICA), and semicircular canals in axial and coronal views. Conclusion The Kawase triangle is shown to be a safe anatomical landmark for anterior petrosectomy. The described landmarks avoid damage to the vital anatomical structures during access to the posterior fossa through middle fossa, despite temporal bone anatomical variations and different tumor sizes.

本文言語English
ページ(範囲)282-287
ページ数6
ジャーナルClinical Neurology and Neurosurgery
139
DOI
出版ステータスPublished - 2015 12月 1

ASJC Scopus subject areas

  • 外科
  • 臨床神経学

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