Lobectomy vs. MRgLITT in Temporal Lobe Epilepsy (TLE): A Pilot Study Investigating Vestibulo-Spatial Functions

Area of Science:

• Neurosurgery
• Epilepsy Treatment
• Vestibular Function

Background:

• Epilepsy affects 65 million globally; drug-resistant temporal lobe epilepsy often necessitates surgery.
• While temporal lobectomy is traditional, minimally invasive MR-guided laser-induced thermal therapy (MRgLITT) shows promise.
• Comparative effects of MRgLITT versus resective open-approach surgery on vestibulo-spatial tasks remain unclear.

Purpose of the Study:

• To compare the vestibulo-spatial task performance of patients undergoing MRgLITT versus temporal lobectomy (R-OP) and non-operated controls (No-OP).
• To evaluate the impact of different surgical approaches on vestibular-dependent cognitive functions.

Main Methods:

• Twenty-seven patients were divided into three groups: MRgLITT, R-OP, and No-OP.
• Groups were age, disease duration, and medication-matched.
• Performance was assessed using the clinical balance test (CBT), triangle completion test (TCT), and rotational memory (RM) test.

Main Results:

• Patients who underwent MRgLITT demonstrated significantly better performance on the triangle completion test (TCT) compared to R-OP and No-OP groups.
• No significant differences were observed between groups for the clinical balance test (CBT) or rotational memory (RM) test.
• The TCT specifically assesses spatial orientation, a vestibular-dependent function.

Conclusions:

• MRgLITT surgery is associated with superior performance on spatial orientation tasks compared to temporal lobectomy and non-operative management.
• The findings suggest MRgLITT may offer advantages in preserving vestibulo-spatial functions.
• Further large-scale, prospective studies are needed to elucidate the underlying mechanisms and confirm these results.