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Related Experiment Video

Updated: May 9, 2025

Full-Endoscopic Surgery for Hypothalamic Hamartoma Resection
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Transorbital Transsylvian Selective Amygdalohippocampectomy: A Feasibility Anatomic Investigation.

Tingting Jiang1,2, Roberto Manfrellotti2, Roberto Tafuto2,3

  • 1Department of Neurosurgery, Azienda Ospedaliera Universitaria di Sassari, Sassari , Italy.

Operative Neurosurgery (Hagerstown, Md.)
|April 28, 2025
PubMed
Summary

Transorbital transsylvian selective amygdalohippocampectomy (TTSA) is a feasible endoscopic technique for mesial temporal lobe epilepsy surgery. This cadaveric study demonstrates comparable resection to open surgery, potentially offering better outcomes.

Keywords:
Endoscopic transorbitalEpilepsy surgeryMesial temporal lobeSkull base surgery

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Area of Science:

  • Neurosurgery
  • Epilepsy Surgery
  • Minimally Invasive Techniques

Background:

  • Mesial temporal lobe epilepsy (MTLE) is the most common drug-resistant epilepsy.
  • Surgical treatment for MTLE is effective but carries risks to neurovascular structures.
  • Endoscopic techniques offer potential alternative surgical routes for MTLE.

Purpose of the Study:

  • To assess the feasibility, advantages, and disadvantages of transorbital transsylvian selective amygdalohippocampectomy (TTSA).
  • To provide a step-by-step anatomic description of the TTSA approach.
  • To compare the transorbital view with the standard transcranial perspective.

Main Methods:

  • TTSA performed on three cadaveric specimens (six sides).
  • CT and MRI scans used to demonstrate resection extent.
  • Neuronavigation employed for trajectory and structure identification.
  • Anatomic landmarks verified via standard transcranial perspective.

Main Results:

  • Dissection involved four sequential steps: extradural approach, sylvian fissure opening, amygdala removal, and hippocampus/parahippocampal gyrus removal.
  • Intradural steps followed established surgical techniques.
  • Provided a comparative anatomic view between transorbital and transcranial approaches.

Conclusions:

  • TTSA is an innovative and feasible approach for amygdalohippocampectomy.
  • Achieved comparable surgical resection to traditional open surgery in cadavers.
  • Potential advantages for neurological and neuropsychological outcomes require further clinical validation.