Abstract

OBJECTIVE: Recent work has shown that people with common epilepsies have characteristic patterns of cortical thinning, and that these changes may be progressive over time. Leveraging a large multicenter cross-sectional cohort, we investigated whether regional morphometric changes occur in a sequential manner, and whether these changes in people with mesial temporal lobe epilepsy and hippocampal sclerosis (MTLE-HS) correlate with clinical features. METHODS: We extracted regional measures of cortical thickness, surface area, and subcortical brain volumes from T1-weighted (T1W) magnetic resonance imaging (MRI) scans collected by the ENIGMA-Epilepsy consortium, comprising 804 people with MTLE-HS and 1625 healthy controls from 25 centers. Features with a moderate case-control effect size (Cohen d?=?.5) were used to train an event-based model (EBM), which estimates a sequence of disease-specific biomarker changes from cross-sectional data and assigns a biomarker-based fine-grained disease stage to individual patients. We tested for associations between EBM disease stage and duration of epilepsy, age at onset, and antiseizure medicine (ASM) resistance. RESULTS: ), and ASM resistance (area under the curve = .59, p = .043, Mann-Whitney U test). However, associations were driven by cases assigned to EBM Stage 0, which represents MTLE-HS with mild or nondetectable abnormality on T1W MRI. SIGNIFICANCE: From cross-sectional MRI, we reconstructed a disease progression model that highlights a sequence of MRI changes that aligns with previous longitudinal studies. This model could be used to stage MTLE-HS subjects in other cohorts and help establish connections between imaging-based progression staging and clinical features.

Authors	Lopez, Seymour M; Aksman, Leon M; Oxtoby, Neil P; Vos, Sjoerd B; Rao, Jun; Kaestner, Erik; Alhusaini, Saud; Alvim, Marina; Bender, Benjamin; Bernasconi, Andrea; Bernasconi, Neda; Bernhardt, Boris; Bonilha, Leonardo; Caciagli, Lorenzo; Caldairou, Benoit; Caligiuri, Maria Eugenia; Calvet, Angels; Cendes, Fernando; Concha, Luis; Conde-Blanco, Estefania; Davoodi-Bojd, Esmaeil; de Bézenac, Christophe; Delanty, Norman; Desmond, Patricia M; Devinsky, Orrin; Domin, Martin; Duncan, John S; Focke, Niels K; Foley, Sonya; Fortunato, Francesco; Galovic, Marian; Gambardella, Antonio; Gleichgerrcht, Ezequiel; Guerrini, Renzo; Hamandi, Khalid; Ives-Deliperi, Victoria; Jackson, Graeme D; Jahanshad, Neda; Keller, Simon S; Kochunov, Peter; Kotikalapudi, Raviteja; Kreilkamp, Barbara A K; Labate, Angelo; Larivière, Sara; Lenge, Matteo; Lui, Elaine; Malpas, Charles; Martin, Pascal; Mascalchi, Mario; Medland, Sarah E; Meletti, Stefano; Morita-Sherman, Marcia E; Owen, Thomas W; Richardson, Mark; Riva, Antonella; Rüber, Theodor; Sinclair, Ben; Soltanian-Zadeh, Hamid; Stein, Dan J; Striano, Pasquale; Taylor, Peter N; Thomopoulos, Sophia I; Thompson, Paul M; Tondelli, Manuela; Vaudano, Anna Elisabetta; Vivash, Lucy; Wang, Yujiang; Weber, Bernd; Whelan, Christopher D; Wiest, Roland; Winston, Gavin P; Yasuda, Clarissa Lin; McDonald, Carrie R; Alexander, Daniel C; Sisodiya, Sanjay M; Altmann, Andre; ,
Journal	Epilepsia
Pages	2081-2095
Volume	63
Date	1/01/2022
Grant ID
Funding Body
URL	http://www.ncbi.nlm.nih.gov/pubmed/?term=10.1111/epi.17316