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A study of medial and lateral temporal lobe epilepsy based on stereoelectroencephalography.

Abstract：

BACKGROUND:Patients with temporal lobe epilepsy (TLE) originating from different seizure onset zones had distinct electrophysiological characteristics and surgical outcomes. In this study, we aimed to investigate the relationship between the origin and prognosis of TLE, and the stereoelectroencephalography (SEEG) features. METHODS:Thirty patients with TLE, who underwent surgical treatment in our functional neurosurgery department from January 2016 to December 2017, were enrolled in this study. All patients underwent anterior temporal lobectomy after an invasive pre-operative evaluation with SEEG. Depending on the epileptic focus location, patients were divided into those with medial temporal lobe seizures (MTLS) and those with lateral temporal lobe seizures (LTLS). The Engel classification was used to evaluate operation effectiveness, and the Kaplan-Meier analysis was used to detect seizure-free duration. RESULTS:The mean follow-up time was 25.7 ± 4.8 months. Effectiveness was 63.3% for Engel I (n = 19), 13.3% for Engel II, 3.3% for Engel III, and 20.0% for Engel IV. According to the SEEG, 60.0% (n = 18) had MTLS, and 40.0% (n = 12) had LTLS. Compared with the MTLS group, the operation age of those with LTLS was significantly greater (26.9 ± 6.9 vs. 29.9 ± 12.5 years, t = -0.840, P = 0.009) with longer epilepsy duration (11.9 ± 6.0 vs. 17.9 ± 12.1 years, t = -1.801, P = 0.038). Patients with MTLS had a longer time interval between ictal onset to seizure (67.3 ± 59.1 s vs. 29.3 ± 24.4 s, t = 2.017, P = 0.008). The most common SEEG ictal pattern was a sharp/spike-wave rhythm in the MTLS group (55.6%) and low-voltage fast activity in the LTLS group (58.3%). Compared with the LTLS group, patients with MTLS had a more favorable prognosis (41.7% vs. 77.8%, P = 0.049). Post-operative recurrence was more likely to occur within three months after the operation for both groups, and there appeared to be a stable long-term outcome. CONCLUSION:Patients with MTLS, who accounted for three-fifths of patients with TLE, showed a more favorable surgical outcome.

journal_name

Chin Med J (Engl)

journal_title

Chinese medical journal

authors

Yan XM,Xu CP,Wang YP,Ma K,Yu T,Zhang XH,Zhang X,Gao RS,Zhang GJ,Li YJ

doi

10.1097/CM9.0000000000001256

subject

Has Abstract

pub_date

2020-12-02 00:00:00

pages

68-72

issue

eissn

0366-6999

issn

2542-5641

pii

00029330-202101050-00013

journal_volume

134

pub_type

杂志文章

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A study of medial and lateral temporal lobe epilepsy based on stereoelectroencephalography.