Related Experiment Video
Updated: May 17, 2026
Anteromesial Temporal Lobectomy for Medically Intractable Temporal Lobe Epilepsy: An Operative Study
Published on: August 15, 2025
Endoscopic transventricular selective amygdalohippocampectomy: cadaveric demonstration of a new operative approach
Biji Bahuleyan1, William Fisher, Shenandoah Robinson
1Division of Pediatric Neurosurgery, Rainbow Babies and Children's Hospital, The Neurological Institute, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA.
Objective:
The microsurgical anatomy of the temporal region has been well described. However, there is a paucity of information about the transventricular endoscopic anatomy of the mesial temporal lobe, and little is known about endoscopic approaches to this region. In this report, we describe the technique of endoscopic amygdalohippocampectomy (AH). The endoscopic anatomy of the mesial temporal region both before and after AH is shown.
Methods:
We used 4 silicon-injected cadaver heads for the study in our minimally invasive neurosurgery laboratory. The lateral ventricle was accessed through an occipital burr hole.
Results:
Predissection transventricular endoscopic anatomy of this region showed the choroid plexus, hippocampus, amygdala, choroid fissure, and collateral eminence. The hippocampus, parahippocampal gyrus, and amygdala were removed endoscopically, keeping the pia on the inferior surface of the mesial temporal region intact. Postdissection anatomy of the mesial temporal region showed a clear view of the brainstem, posterior cerebral vessels, choroidal vessels, and tentorium.
Conclusions:
We studied the transventricular endoscopic anatomy of the mesial temporal region and described a technique for safe endoscopic AH. The advantages and potential risks of endoscopic AH are discussed, along with suggestions for minimizing complications. We believe that knowledge of the endoscopic anatomy of the mesial temporal lobe will be useful for endoscopic AH and the removal of other lesions in this region.
Insights
This study details the transventricular endoscopic anatomy of the mesial temporal lobe and introduces a safe endoscopic amygdalohippocampectomy technique. Understanding this anatomy is crucial for minimally invasive neurosurgery in this region.
Area of Science:
- Neurosurgery
- Anatomy
- Minimally Invasive Surgery
Background:
- Microsurgical anatomy of the temporal region is well-documented.
- Transventricular endoscopic anatomy of the mesial temporal lobe is less understood.
- Endoscopic approaches to the mesial temporal region require further investigation.
Purpose of the Study:
- To describe the transventricular endoscopic anatomy of the mesial temporal lobe.
- To present the technique for endoscopic amygdalohippocampectomy (AH).
- To illustrate the endoscopic anatomy before and after AH.
Main Methods:
- Utilized 4 silicon-injected cadaver heads in a neurosurgery laboratory.
- Accessed the lateral ventricle via an occipital burr hole.
- Performed endoscopic dissection and visualization.
Main Results:
- Identified key structures including the choroid plexus, hippocampus, amygdala, and choroid fissure.
- Successfully removed the hippocampus, parahippocampal gyrus, and amygdala endoscopically.
- Achieved clear visualization of the brainstem, posterior cerebral vessels, and tentorium post-procedure.
Conclusions:
- Established the transventricular endoscopic anatomy of the mesial temporal region.
- Described a safe technique for endoscopic amygdalohippocampectomy.
- Highlighted the utility of endoscopic anatomy knowledge for AH and lesion removal in this area.
