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Updated: May 20, 2026
Anteromesial Temporal Lobectomy for Medically Intractable Temporal Lobe Epilepsy: An Operative Study
Published on: August 15, 2025
Granule cell dispersion is not a predictor of surgical outcome in temporal lobe epilepsy with mesial temporal
Rafael Scarpa da Costa Neves1, Anaclara Prada Jardim, Luís Otávio Caboclo
1Department of Neurology, Neurosurgery, Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, SP, Brazil. rafaelscarpa@uol.com.br
Abstract:
The aim of this retrospective study of a series of patients with mesial temporal lobe epilepsy (MTLE) and mesial temporal sclerosis (MTS) was to analyze the association of granule cell dispersion (GCD) with surgical prognosis, patterns of MTS and clinical data. Hippocampal specimens from 66 patients with MTLE and unilateral MTS and from 13 controls were studied. Quantitative neuropathological evaluation was performed on NeuN-stained hippocampal sections. Patients' clinical data, types of MTS and surgical outcome were reviewed. GCD occurred in 45.5% of cases and was not correlated with clinical variable. More severe neuronal loss was observed in patients with GCD. Except for MTS Type 2 - observed only in four no- GCD patients - groups did not differ with respect to the types of MTS. Surgical outcome was similar in both groups. In conclusion, GCD was associated with the degree of hippocampal cell loss, but was not a predictor of surgical outcome.
Insights
Granule cell dispersion (GCD) in mesial temporal lobe epilepsy (MTLE) correlates with greater hippocampal cell loss but does not predict surgical outcomes in patients with mesial temporal sclerosis (MTS).
Area of Science:
- Neurology
- Epileptology
- Neuroscience
Background:
- Mesial temporal lobe epilepsy (MTLE) with mesial temporal sclerosis (MTS) is a common cause of drug-resistant epilepsy.
- Granule cell dispersion (GCD) is a neuropathological feature observed in MTLE, but its prognostic significance remains debated.
Purpose of the Study:
- To investigate the association between GCD and surgical prognosis in patients with MTLE and MTS.
- To analyze the relationship of GCD with patterns of MTS and clinical variables.
Main Methods:
- Retrospective analysis of hippocampal specimens from 66 MTLE patients with unilateral MTS and 13 controls.
- Quantitative neuropathological evaluation of NeuN-stained sections for GCD and neuronal loss.
- Review of clinical data, MTS types, and surgical outcomes.
Main Results:
- GCD was present in 45.5% of MTLE patients.
- GCD was associated with more severe hippocampal neuronal loss.
- No significant correlation was found between GCD and clinical variables or surgical outcomes.
- MTS Type 2 was observed only in patients without GCD.
Conclusions:
- GCD is linked to the severity of hippocampal cell loss in MTLE.
- GCD is not a reliable predictor of surgical prognosis in this patient cohort.
