Surgery for medically intractable epilepsy due to postinfectious etiologies.

Area of Science:

• Neurology
• Neurosurgery
• Infectious Diseases

Background:

• Medically intractable epilepsy (MIE) from postinfectious causes is rarely reported.
• A significant prevalence (5.7%) of such cases requiring surgery was observed.
• Epilepsy onset averaged 1.4 years post-infection, with a mean duration of 8.2 years before surgery.

Purpose of the Study:

• To investigate the surgical outcomes for patients with medically intractable epilepsy secondary to postinfectious etiologies.
• To analyze the diverse range of infectious causes and surgical procedures employed.
• To evaluate the efficacy of surgical interventions in achieving seizure freedom.

Main Methods:

• Retrospective case series of 28 patients undergoing surgery for postinfectious epilepsy.
• Analysis of epilepsy duration, time from infection to onset, and underlying pathologies.
• Categorization of surgical procedures (resections, hemispherotomy) and outcome assessment using Engel classification.

Main Results:

• Common pathologies included postpyogenic sequelae, neurocysticercosis, and tuberculomas.
• Surgical interventions involved various resections (temporal, frontal, parietal) and hemispherotomy.
• Good outcomes (Engel class I and II) were achieved in 23 of 28 patients (82%), with 17 (61%) seizure-free (Engel class I).
• Hippocampal sclerosis was noted in 9 cases, particularly in younger patients.

Conclusions:

• Surgical treatment offers a viable and effective option for medically intractable epilepsy stemming from postinfectious causes.
• Diverse infectious etiologies can lead to epilepsy requiring surgical management.
• A high rate of favorable seizure control can be achieved through surgical intervention in carefully selected patients.