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A Pipeline for 3D Multimodality Image Integration and Computer-assisted Planning in Epilepsy Surgery
Published on: May 20, 2016
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Visual field deficits after epilepsy surgery: a new quantitative scoring method
Rick H G J van Lanen1,2, M C Hoeberigs3, N J C Bauer4
1Faculty of Health Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands. rick.van.lanen@mumc.nl.
Acta Neurochirurgica
|April 7, 2018
Summary
A new method quantifies visual field deficits (VFDs) after anterior temporal lobectomy for epilepsy. Larger resections correlate with higher VFD, particularly on the right side.
Area of Science:
- Neurosurgery
- Ophthalmology
- Epilepsy Research
Background:
- Anterior temporal lobectomy (ATL) for drug-resistant epilepsy often causes visual field deficits (VFDs), typically homonymous contralateral upper quadrantanopia.
- The incidence of VFDs post-ATL ranges widely from 15% to 90%.
- A quantitative method for assessing postoperative VFDs in static perimetry is currently lacking.
Purpose of the Study:
- To develop and assess the feasibility of a novel quantitative scoring method for evaluating postoperative VFDs.
- To enable comparison of VFDs between patient groups based on surgical parameters.
Main Methods:
- Fifty-five patients with drug-resistant temporal lobe epilepsy (TLE) undergoing ATL were included.
- Pre- and postoperative perimetry data were collected and analyzed.
- Temporal lobe resection length was measured, and percentage VFD was calculated for different visual field quadrants.
Main Results:
- A significant correlation was found between larger resection size (≥45 mm) and higher VFD for right-sided ATL (p=0.04).
- Left-sided ATL showed more VFD in the right eye compared to the left (p=0.03).
- A significant quantitative correlation between VFD and resection size was demonstrated for right-sided ATL (r=0.52, p<0.01).
Conclusions:
- A new quantitative scoring method for postoperative VFD assessment after ATL for TLE has been developed and validated.
- The study confirms a significant correlation between VFD and resection size, especially for right-sided ATL.
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