Amygdala enlargement occurs in patients with mesial temporal lobe epilepsy and hippocampal sclerosis with early epilepsy onset.
Mesial temporal lobe epilepsy (MTLE) associated with hippocampal sclerosis (HS) is considered an electroclinical syndrome, and there is a debate whether it is a unique disease or an entity with distinct subtypes. Together with other mesial temporal structures, the amygdala is important in the epileptogenic network of patients with MTLE with HS. During automatic volumetric analysis of mesial structures in a group of 102 patients with MTLE with MRI signs of HS, we observed significant amygdala enlargement in 14 (14%) individuals compared to a group of 79 healthy subjects. The increased amygdala volume was contralateral to the epileptogenic zone and MRI signs of HS in 93% of these patients. Patients with MTLE with HS and enlarged amygdala had significantly earlier epilepsy onset than those without an increase of amygdala volumes. Mesial temporal lobe epilepsy with HS and enlarged amygdala may be a part of the spectrum of this condition.
Neuroimaging Laboratory, Department of Neurology, State University of Campinas, Campinas, SP, Brazil. Electronic address: accoan@gmail.com.
Ana C
AC
Coan
Marcia E
ME
Morita
Brunno M
BM
Campos
Felipe P G
FP
Bergo
Bruno Y
BY
Kubota
Fernando
F
Cendes
D000328:Adult; D017668:Age of Onset; D000679:Amygdala / Q000473:pathology*; D001929:Brain Edema / Q000209:etiology* / Q000473:pathology*; D001931:Brain Mapping; D004569:Electroencephalography; D004833:Epilepsy, Temporal Lobe / Q000150:complications*; D005260:Female; D006624:Hippocampus / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012598:Sclerosis / Q000209:etiology
Amygdala; HS; MTLE; MTLE-EA; MTLE-no; Mesial temporal lobe epilepsy; Volumetry; hippocampal sclerosis; mesial temporal lobe epilepsy; mesial temporal lobe epilepsy with enlarged amygdala; mesial temporal lobe epilepsy without enlarged amygdala