Chronic inflammation in refractory hippocampal sclerosis-related temporal lobe epilepsy

被引:31
作者
Gales, Jordan M. [1 ]
Prayson, Richard A. [1 ]
机构
[1] Cleveland Clin, Lerner Coll Med, Dept Anat Pathol, Cleveland, OH 44195 USA
关键词
Hippocampal sclerosis; Chronic inflammation; Temporal lobe epilepsy; HOC TASK-FORCE; CONSENSUS CLASSIFICATION; ANTIEPILEPTIC DRUGS; DIAGNOSTIC METHODS; FEBRILE SEIZURES; ILAE COMMISSION; INFILTRATION; SURGERY;
D O I
10.1016/j.anndiagpath.2017.05.009
中图分类号
R36 [病理学];
学科分类号
100104 ;
摘要
Emerging evidence suggests chronic inflammation may play a role in hippocampal sclerosis-associated temporal lobe epilepsy. We sought to systematically evaluate for its presence in a group of 315 patients who underwent surgery for medically-refractory epilepsy and who had hippocampal sclerosis. Upon histologic review of hematoxylin and eosin stained tissue sections, 95 (41%) cases demonstrated the presence of lymphocytes within the perivascular region and diffusely within the brain parenchyma. Those cases with chronic inflammation evident on hematoxylin and eosin staining were significantly more likely to experience a post-operative seizure recurrence than those without it (p = 0.03). In 9 cases of hippocampi with chronic inflammation observed on hematoxylin and eosin stained sections, there was a mixture of both T (CD3 +) and B (CD20 +) lymphocytes located around blood vessels and interspersed within the brain parenchyma and a predominance of CD4 positive T cells versus CD8 positive cells. Ten hippocampi, apparently devoid of chronic inflammation upon inspection with hematoxylin and eosin stained sections, were stained with the lymphocyte common antigen CD45. In all 10 cases, scattered lymphoid cells were observed in the brain parenchyma, suggesting some level of chronic inflammation may be present in more cases than casual inspection might suggest. This study was the first to evaluate the incidence of chronic inflammation within a large temporal lobe epilepsy population. The study findings suggest chronic inflammation may be a more common component of hippocampal sclerosis-associated temporal lobe epilepsy than previously believed.
引用
收藏
页码:12 / 16
页数:5
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