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Updated: Apr 15, 2026

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Reconstructive challenges in the extended endoscopic transclival approach.

A Kamat1, J Y K Lee2, G H Goldstein1

  • 1Department of Otorhinolaryngology - Head and Neck Surgery,Hospital of the University of Pennsylvania,Philadelphia,USA.

The Journal of Laryngology and Otology
|April 2, 2015
PubMed
Summary

The extended endoscopic approach for clival pathology shows improved cerebrospinal fluid leak rates, though transclival approaches remain challenging. Further technical advancements are needed for this difficult skull base region.

Keywords:
Cerebrospinal Fluid LeakCranial FossaEndoscopyMinimally Invasive Surgical ProceduresNatural Orifice Endoscopic SurgeryPosteriorSkull Base

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Area of Science:

  • Neurosurgery
  • Skull Base Surgery
  • Endoscopic Endonasal Surgery

Background:

  • The extended endoscopic approach is increasingly used for skull base pathologies.
  • Clival pathologies present unique surgical challenges, particularly regarding cerebrospinal fluid (CSF) leak and reconstruction.
  • Minimally invasive techniques aim to reduce morbidity associated with traditional open approaches.

Purpose of the Study:

  • To present the institutional experience with the extended endoscopic approach for clival pathology.
  • To analyze the incidence and risk factors for postoperative cerebrospinal fluid (CSF) leak.
  • To discuss reconstruction challenges and outcomes in this patient cohort.

Main Methods:

  • A consecutive series of 37 patients undergoing extended endoscopic skull base surgery were reviewed.
  • Nine patients with clival pathology were specifically analyzed.
  • Data collected included tumor pathology, location, size, reconstruction methods, and use of lumbar drain to assess CSF leak incidence.

Main Results:

  • The overall incidence of postoperative CSF leak was 10.8%.
  • Patients undergoing a transclival approach had a significantly higher incidence of CSF leak (75%, p < 0.05).
  • Intradural dissection in clival pathology cases was associated with a higher risk of CSF leak (p < 0.05).

Conclusions:

  • Advancements like the vascularized nasoseptal flap have improved CSF leak rates in extended endoscopic skull base surgery.
  • Transclival approaches remain technically demanding and associated with higher CSF leak rates.
  • Further research and technical innovation are required to address the specific challenges of the clival region.