Drug-resistant temporal lobe epilepsy due to cavernous malformations

Area of Science:

• Neurosurgery
• Epileptology
• Neuroradiology

Background:

• Supratentorial cavernous malformations (CMs) are linked to drug-resistant focal epilepsy.
• Optimal presurgical workup and surgical strategies for CM-related epilepsy remain unclear.
• Long disease history and frequent seizures often predict poor surgical outcomes.

Purpose of the Study:

• To evaluate the efficacy of surgical management for drug-resistant temporal lobe epilepsy (TLE) caused by CMs.
• To review the optimal presurgical diagnostic workup and surgical strategies for this patient subgroup.
• To assess seizure control and functional outcomes following surgery.

Main Methods:

• Eight consecutive patients with TLE due to CMs underwent surgery.
• A noninvasive protocol assessed anatomical, electrical, and clinical criteria to localize the epileptogenic zone.
• Surgical strategies included lesionectomy, lesionectomy with anteromesial temporal lobectomy, or lesionectomy with extended temporal lobectomy.

Main Results:

• Seven patients achieved Engel Class IA (seizure-free) outcomes.
• One patient achieved Engel Class IB (occasional auras only) outcome.
• No adverse neuropsychological or psychosocial effects were observed post-surgery.

Conclusions:

• Epilepsy surgery provides excellent seizure control for intractable TLE secondary to CMs.
• Noninvasive presurgical evaluation facilitates a personalized surgical approach.
• This strategy leads to complete seizure relief in the majority of cases.