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Updated: May 23, 2026

Minimally Invasive Thumb-sized Pterional Craniotomy for Surgical Clip Ligation of Unruptured Anterior Circulation Aneurysms
11:58

Minimally Invasive Thumb-sized Pterional Craniotomy for Surgical Clip Ligation of Unruptured Anterior Circulation Aneurysms

Published on: August 11, 2015

When is posterolateral orbitotomy useful in a pterional craniotomy? A morphometric study.

Benjamin Brown1, Anirban Deep Banerjee, Rishi Wadhwa

  • 1Department of Neurosurgery, Louisiana State University Health Sciences Center-Shreveport, Shreveport, Louisiana.

Skull Base : Official Journal of North American Skull Base Society ... [Et Al.]
|March 28, 2012
PubMed
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Adding posterolateral orbitotomy to pterional craniotomy significantly improves surgical access to key brain regions. This enhanced exposure benefits procedures involving the anterior third ventricular region and anterior communicating artery complex.

Area of Science:

  • Neurosurgery
  • Skull Base Surgery
  • Anatomical Studies

Background:

  • Pterional craniotomy provides anterolateral skull base exposure.
  • The added benefit of posterolateral orbitotomy is not well-quantified for specific surgical targets.

Purpose of the Study:

  • To quantitatively assess the improvement in surgical exposure by adding posterolateral orbitotomy to pterional craniotomy.
  • To evaluate the impact on the angle of attack to specific neurovascular structures.

Main Methods:

  • Cadaveric dissection of five heads (10 sides).
  • Morphometric analysis of pterional craniotomy exposure.
  • Repeat analysis after adding posterolateral orbitotomy.
  • Comparison of field of view and angle of attack measurements.
Keywords:
MorphometricPterional craniotomyposterolateral orbitotomystudy

Related Experiment Videos

Last Updated: May 23, 2026

Minimally Invasive Thumb-sized Pterional Craniotomy for Surgical Clip Ligation of Unruptured Anterior Circulation Aneurysms
11:58

Minimally Invasive Thumb-sized Pterional Craniotomy for Surgical Clip Ligation of Unruptured Anterior Circulation Aneurysms

Published on: August 11, 2015

Main Results:

  • Addition of orbitotomy increased exposure angle to ICA bifurcation by 15%, anterior third ventricular region by 29%, and A-Com complex by 50%.
  • Significant improvement in angle of attack for anterior third ventricular region and A-Com complex.

Conclusions:

  • Posterolateral orbitotomy enhances pterional craniotomy for accessing the anterior third ventricular region and A-Com complex.
  • Orbitopterional approach is supported for specific suprasellar lesions and A-Com aneurysms.