Hippocampal magnetic resonance imaging in focal onset seizure with impaired awareness—descriptive study from tertiary care centre in southern part of India

The Egyptian Journal of Neurology, Psychiatry and Neurosurgery

Naufal Perumpalath¹  Juvaina Puthiyakam¹  Aleena Elizabeth Andrews²  Andrews Mekkattukunnel³ 

[1] Department of Radiodiagnosis, Government Medical College Kozhikode, Kozhikode, India;Department of Radiodiagnosis, Government Medical College, Thrissur, Kerala, India;Professor of Medicine, Government Medical College Thrissur, 680002, Thrissur, Kerala, India;Mekkattukunnel House, Chakkoth lane, Poonkunnam, 680002, Thrissur, Kerala, India;

关键词: Focal onset seizure with impaired awareness;    Complex partial seizures;    Mesial temporal lobe epilepsy (MTLE);    Hippocampal sclerosis (HS);    Hippocampal volumetry;   

DOI  :  10.1186/s41983-021-00347-8

来源: Springer

【 摘 要 】

BackgroundTemporal lobe epilepsy is the most common type of focal onset seizure. Focal onset seizure with impaired awareness, previously known as complex partial seizure (CPS), account for 18–40% of all seizure types. Hippocampal sclerosis (HS) is the most common cause of temporal lobe epilepsy, which produces focal onset seizure with impaired awareness. It may be detected in MRI visually, but bilateral abnormalities are better identified using volumetric analysis.We aimed to compare hippocampal volume in patients with focal onset seizure with impaired awareness visually and quantitatively.MethodologyThis cross-sectional study includes clinically diagnosed cases of 56 focal onset seizure with impaired awareness undergoing MRI at a tertiary teaching hospital in the southern part of India for a duration of 18 months from February 2018 to August 2019.ResultsOut of 53 patients studied using 1.5 T MRI brain with seizure protocols, hippocampal atrophy was identified visually in 13 (24.5%) on the right side, 9 (16.98%) on the left side, and in 6 (11.32%) bilaterally. However, with volumetry, hippocampal atrophy (not taking T2 signal change) was detected in 15 (28.30%) on the right side, 10 (18.86%) on the left side, and in 7 (13.20%) bilaterally. Hippocampal volumes between ipsilateral and contralateral seizure focus were found to have no significant difference (p-0.84).ConclusionsThough visual analysis is efficient in the diagnosis of pathology, MR volumetry may be used as an expert eye in cases of subtle volume loss.

【 授权许可】

CC BY