Removal of epileptogenic lesions is an effective way to treat patients with drug-resistant epilepsy. The result of surgical treatment depends on the correct detection of pathology, definition of its boundaries. No lesion on magnetic resonance imaging is not a contraindication to surgical treatment, but requires a survey. Each of the additional methods has its advantages and disadvantages. Сomprehensive examination, analysis and comparison of positron emission tomography, single-photon emission computed tomography, magnetoencephalography, scalp and invasive electroencephalography data can significantly improve the results of surgical treatment MRI-negative epilepsy patients. Clarification of the pre-surgical evaluation algorithm will allow to optimize the use of techniques.

The aim of the study wasto evaluate the long-term results ofsurgicaltreatment of patients with pharmacoresistant epilepsy.Materials and methods. A retrospective analysis of treatment outcomes in patients with drug-resistant temporal lobe epilepsy was performed. According to the inclusion and exclusion criteria, 96 patients were selected for the study. Group 1 contained 49 operated patients with MR-positive epilepsy and Group 2 contained 47 operated patients with MR-ne‑ gative epilepsy. The control group consisted of 53 unoperated patients. The outcomes ofsurgical treatment were assessed after 6, 12, and 24 months. Results. Unfavorable outcomes occurred more frequently among nonoperated patients compared to both surgical groups (p <0.001). The probability of the 2-year remission after surgery in operated MRI positive patients was 60 %, in MRI negative group was 45 %, and in conservative group – only 2 %. The mean duration of the seizures-free period was greatest̆in the MRI positive surgical group (15.4 ± 1.5 months), and shortest in the control group (3.3 ± 0.9 months).Conclusion. The presented results prove the effectiveness and safety of surgical treatment of patients with temporal lobe epilepsy.