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Epilepsy and Seizures: Overview

Epilepsy and Seizures: Overview

Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...

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Updated: May 19, 2026

Anteromesial Temporal Lobectomy for Medically Intractable Temporal Lobe Epilepsy: An Operative Study

Anteromesial Temporal Lobectomy for Medically Intractable Temporal Lobe Epilepsy: An Operative Study

Published on: August 15, 2025

Temporal lobe epilepsy surgery failures: a review.

Adil Harroud¹, Alain Bouthillier, Alexander G Weil

¹Division of Neurology, Hôpital Notre-Dame du CHUM, University of Montreal, Montreal, QC, Canada H2L 4M1.

Epilepsy Research and Treatment

|August 31, 2012

Summary

This summary is machine-generated.

Temporal lobe epilepsy (TLE) surgery fails in 20-30% of patients. Common causes include incomplete resection, dual pathology, and extratemporal epilepsy, necessitating precise diagnosis for better outcomes.

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Last Updated: May 19, 2026

Anteromesial Temporal Lobectomy for Medically Intractable Temporal Lobe Epilepsy: An Operative Study

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Published on: August 15, 2025

Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients

Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients

Published on: December 18, 2016

Area of Science:

Neurology
Neurosurgery
Epilepsy Research

Background:

Approximately 30% of temporal lobe epilepsy (TLE) patients are drug-resistant.
Surgery offers benefits but fails to achieve seizure freedom in 20-30% of TLE patients.

Purpose of the Study:

To identify and discuss the five most common causes of TLE surgery failure.
To highlight factors contributing to persistent seizures after temporal lobe epilepsy surgery.

Main Methods:

Review and analysis of identified causes of TLE surgery failure.
Discussion of diagnostic challenges in distinguishing TLE from other epilepsy types.

Main Results:

Five primary causes of TLE surgery failure identified: insufficient resection, contralateral relapse, neocortical epilepsy, dual pathology, and extratemporal epilepsy.
Specific challenges include persistent mesial structures, misdiagnosis of mesial vs. lateral epilepsy, subtle dual pathology, and extratemporal syndromes like insular epilepsy.

Conclusions:

Accurate identification of the epileptogenic zone is crucial for successful TLE surgery.
Addressing dual pathology and extratemporal epilepsy is essential to improve surgical outcomes in TLE patients.