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Li Y, Liu P, Lin Q, Li W, Zhang Y, Li J, Li X, Gong Q, Zhang H, Li L, Sima X, Cao D, Huang X, Huang K, Zhou D, An D. Temporopolar blurring signifies abnormalities of white matter in mesial temporal lobe epilepsy. Ann Clin Transl Neurol 2024. [PMID: 39342438 DOI: 10.1002/acn3.52204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Revised: 08/19/2024] [Accepted: 08/26/2024] [Indexed: 10/01/2024] Open
Abstract
OBJECTIVE The single-center retrospective cohort study investigated underlying pathogenic mechanisms and clinical significance of patients with temporal lobe epilepsy and hippocampal sclerosis (TLE-HS), in the presence/absence of gray-white matter abnormalities (usually called "blurring"; GMB) in ipsilateral temporopolar region (TPR) on MRI. METHODS The study involved 105 patients with unilateral TLE-HS (60 GMB+ and 45 GMB-) who underwent standard anterior temporal lobectomy, along with 61 healthy controls. Resected specimens were examined under light microscope. With combined T1-weighted and DTI data, we quantitatively compared large-scale morphometric features and exacted diffusion parameters of ipsilateral TPR-related superficial and deep white matter (WM) by atlas-based segmentation. Along-tract analysis was added to detect heterogeneous microstructural alterations at various points along deep WM tracts, which were categorized into inferior longitudinal fasciculus (ILF), uncinate fasciculus (UF), and temporal cingulum. RESULTS Comparable seizure semiology and postoperative seizure outcome were found, while the GMB+ group had significantly higher rate of HS Type 1 and history of febrile seizures, contrasting with significantly lower proportion of interictal contralateral epileptiform discharges, HS Type 2, and increased wasteosomes in hippocampal specimens. Similar morphometric features but greater WM atrophy with more diffusion abnormalities of superficial WM was observed adjacent to ipsilateral TPR in the GMB+ group. Moreover, microstructural alterations resulting from temporopolar GMB were more localized in temporal cingulum while evenly and widely distributed along ILF and UF. INTERPRETATION Temporopolar GMB could signify more severe and widespread microstructural damage of white matter rather than a focal cortical lesion in TLE-HS, affecting selection of surgical procedures.
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Affiliation(s)
- Yuming Li
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Peiwen Liu
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Qiuxing Lin
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Wei Li
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Yingying Zhang
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Jinmei Li
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Xiuli Li
- Huaxi MR Research Center, Department of Radiology, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Qiyong Gong
- Huaxi MR Research Center, Department of Radiology, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Heng Zhang
- Department of Neurosurgery, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Luying Li
- Department of Neurosurgery, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Xiutian Sima
- Department of Neurosurgery, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Danyang Cao
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Xiang Huang
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Kailing Huang
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Dong Zhou
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Dongmei An
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, China
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Fava A, Lisi SV, Mauro L, Morace R, Ciavarro M, Gorgoglione N, Petrella G, Quarato PP, Di Gennaro G, di Russo P, Esposito V. The anterior sylvian point as a reliable landmark for the anterior temporal lobectomy in mesial temporal lobe epilepsy: technical note, case series, and cadaveric dissection. Front Med (Lausanne) 2024; 11:1352321. [PMID: 39015783 PMCID: PMC11250084 DOI: 10.3389/fmed.2024.1352321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 05/29/2024] [Indexed: 07/18/2024] Open
Abstract
Introduction Mesial temporal lobe epilepsy (MTLE) is one of the most prevalent forms of focal epilepsy in surgical series, particularly among adults. Over the decades, different surgical strategies have been developed to address drug-resistant epilepsy while safeguarding neurological and cognitive functions. Among these strategies, anterior temporal lobectomy (ATL), involving the removal of the temporal pole and mesial temporal structures, has emerged as a widely employed technique. Numerous modifications have been proposed to mitigate the risks associated with aphasia, cognitive issues, and visual field defects. Methods Our approach is elucidated through intraoperative and cadaveric dissections, complemented by neuroradiological and cadaveric measurements of key anatomical landmarks. A retrospective analysis of patients with drug-resistant MTLE who were treated using our ATL technique at IRCCS Neuromed (Pozzilli) is presented. Results A total of 385 patients were treated with our ATL subpial technique anatomically focused on the anterior Sylvian point (ASyP). The mean FU was 9.9 ± 5.4 years (range 1-24). In total, 84%of patients were free of seizures during the last follow-up, with no permanent neurological deficits. Transient defects were as follows: aphasia in 3% of patients, visual field defects in 2% of patients, hemiparesis in 2% of patients, and cognitive/memory impairments in 0.8% of patients. In cadaveric dissections, the ASyP was found at a mean distance from the temporal pole of 3.4 ± 0.2 cm (range 3-3.8) at the right side and 3.5 ± 0.2 cm (3.2-3.9) at the left side. In neuroimaging, the ASyP resulted anterior to the temporal horn tip in all cases at a mean distance of 3.2 ± 0.3 mm (range 2.7-3.6) at the right side and 3.5 ± 0.4 mm (range 2.8-3.8) at the left side. Discussion To the best of our knowledge, this study first introduces the ASyP as a reliable and reproducible cortical landmark to perform the ATL to overcome the patients' variabilities, the risk of Meyer's loop injury, and the bias of intraoperative measurements. Our findings demonstrate that ASyP can be a safe cortical landmark that is useful in MTLE surgery because it is constantly present and is anterior to risky temporal regions such as temporal horn and language networks.
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Affiliation(s)
- Arianna Fava
- IRCCS Neuromed, Pozzilli, Italy
- Laboratory of Neuroanatomy “G. Cantore”, IRCCS Neuromed, Pozzilli, Italy
- Department of Human Neurosciences, University of Rome “La Sapienza”, Rome, Italy
| | | | - Luigi Mauro
- Laboratory of Neuroanatomy “G. Cantore”, IRCCS Neuromed, Pozzilli, Italy
| | | | | | - Nicola Gorgoglione
- IRCCS Neuromed, Pozzilli, Italy
- Laboratory of Neuroanatomy “G. Cantore”, IRCCS Neuromed, Pozzilli, Italy
| | | | | | | | - Paolo di Russo
- IRCCS Neuromed, Pozzilli, Italy
- Laboratory of Neuroanatomy “G. Cantore”, IRCCS Neuromed, Pozzilli, Italy
| | - Vincenzo Esposito
- IRCCS Neuromed, Pozzilli, Italy
- Laboratory of Neuroanatomy “G. Cantore”, IRCCS Neuromed, Pozzilli, Italy
- Department of Human Neurosciences, University of Rome “La Sapienza”, Rome, Italy
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Mugikura S, Mori N, Gang M, Kanno S, Jin K, Osawa SI, Nakasato N, Takase K. Interhemispheric asymmetrical change in gray matter volume in patients with unilateral hippocampal sclerosis. J Clin Imaging Sci 2023; 13:38. [PMID: 38205275 PMCID: PMC10778066 DOI: 10.25259/jcis_77_2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Accepted: 11/14/2023] [Indexed: 01/12/2024] Open
Abstract
Objectives To clarify the interhemispheric asymmetrical change in gray matter volume (GMV) in unilateral hippocampal sclerosis (HS), we compared changes in GMV relative to normal subjects between the HS and contralateral or non-HS sides. Material and Methods Forty-five patients with unilateral HS and 30 healthy subjects were enrolled. We quantified changes in GMV in the patients with HS as compared to GMV in the normal subjects by introducing the Z-score (Z-GMV) in each region or region of interest in unilateral HS. Then, we assessed the asymmetrically decreased regions, that is, regions with significantly higher Z-GMV on the HS side than the contralateral or non-HS side. Z-GMV was calculated according to the two templates of 58 regions per hemisphere covering the whole brain by anatomical automatic labeling (AAL) and 78 regions per cerebral hemisphere using the Anatomy Toolbox. Results Seven and four regions in AAL and 17 and 11 regions in Anatomy Toolbox were asymmetrically decreased in the Left Hand Side (LHS) and Right Hand Side (RHS), respectively. Hippocampus and Caudate in AAL, five subregions of the hippocampus (CA1-3, Dentate Gyrus and hippocampus-amygdala-transition-area and 4 extrahippocampal regions including two subregions in amygdala (CM: Centromedial, SF: Superficial), basal forebrain (BF) (Ch4), and thalamus (temporal) in anatomy toolbox were common among LHS and RHS concerning asymmetrically decreased regions. Conclusion By introducing Z-GMV, we demonstrated the regions with asymmetrically decreased GMV in LHS and RHS, and found that the hippocampus and extrahippocampal regions, including the BF, were the common asymmetrically decreased regions among LHS and RHS.
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Affiliation(s)
- Shunji Mugikura
- Department of Diagnostic Radiology, Graduate School of Medicine, Tohoku University, Sendai, Japan
| | - Naoko Mori
- Department of Radiology, Akita University Graduate School of Medicine, Akita, Japan
| | - Miyeong Gang
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University, Sendai, Japan
| | - Shigenori Kanno
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University, Sendai, Japan
| | - Kazutaka Jin
- Department of Epileptology, Graduate School of Medicine, Tohoku University, Sendai, Japan
| | - Shin-Ichiro Osawa
- Department of Neurosurgery, Graduate School of Medicine, Tohoku University, Sendai, Japan
| | - Nobukazu Nakasato
- Department of Epileptology, Graduate School of Medicine, Tohoku University, Sendai, Japan
| | - Kei Takase
- Department of Diagnostic Radiology, Graduate School of Medicine, Tohoku University, Sendai, Japan
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Pereira Dalio MTR, Velasco TR, Feitosa IDF, Assirati Junior JA, Carlotti Junior CG, Leite JP, Dos Santos AC, Alexandre V, Nakano FN, Saute RL, Wichert-Ana L, Sakamoto AC. Long-Term Outcome of Temporal Lobe Epilepsy Surgery in 621 Patients With Hippocampal Sclerosis: Clinical and Surgical Prognostic Factors. Front Neurol 2022; 13:833293. [PMID: 35547380 PMCID: PMC9084624 DOI: 10.3389/fneur.2022.833293] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 02/28/2022] [Indexed: 11/24/2022] Open
Abstract
Temporal lobe epilepsy (TLE) is the most common type of focal epilepsy and is frequently drug-resistant (DR) to antiseizure medication (ASM), corresponding to approximately one-third of the cases. When left inadequately treated, it can worsen the quality of life, cognitive deficits, and risk of death. The standard treatment for drug-resistant TLE is the surgical removal of the structures involved, with good long-term outcome rates of 60–70 % and a low rate of adverse effects. The goal of successful treatment is sustained seizure freedom. In our study, we evaluated sustained long-term (up to 23 years) surgical outcomes in 621 patients with DR-TLE associated with hippocampal sclerosis, who underwent a temporal lobectomy. We analyzed the main predictive factors that influence the surgical outcome related to seizure control, through a longitudinal and retrospective study, using a multivariable regression model. We found that 73.6% of the patients were free from disabling seizures (Engel Class I), maintained over time in 65% of patients followed up to 23 years after surgery. We found that four independent variables predicted seizure outcomes. The presence of dysmnesic and olfactory aura predicted a less favorable outcome. The history of febrile seizure and the surgical technique predicted a good outcome. Regarding the type of surgical technique, the standard anteromesial temporal lobectomy (ATL) led to significantly better outcomes (78.6% Engel Class I) when compared to the selective amygdalohippocampectomy via subtemporal approach (67.2% Engel Class I; p = 0.002), suggesting that the neuronal networks involved in the epileptogenic zone may be beyond mesial temporal structures. The multivariable regression model with the above-mentioned predictor variables revealed an ExpB = 3.627 (N = 621, p < 0.001), indicating that the model was able to distinguish between patients with a seizure-free. We conclude that epilepsy surgery is a safe procedure, with low rates of postoperative complications and good long-term results.
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Affiliation(s)
- Marina Teixeira Ramalho Pereira Dalio
- Epilepsy Surgery Center (CIREP), Department of Neurosciences and Behavioral Sciences, Hospital of Clinics of the Medical School of Ribeirão Preto of the University of São Paulo (HCFMRP-USP), Ribeirão Preto, Brazil
| | - Tonicarlo Rodrigues Velasco
- Epilepsy Surgery Center (CIREP), Department of Neurosciences and Behavioral Sciences, Hospital of Clinics of the Medical School of Ribeirão Preto of the University of São Paulo (HCFMRP-USP), Ribeirão Preto, Brazil
| | - Izabela Dayany Franca Feitosa
- Epilepsy Surgery Center (CIREP), Department of Neurosciences and Behavioral Sciences, Hospital of Clinics of the Medical School of Ribeirão Preto of the University of São Paulo (HCFMRP-USP), Ribeirão Preto, Brazil
| | - João Alberto Assirati Junior
- Department of Surgery and Neurosurgery, Hospital of Clinics of the Medical School of Ribeirão Preto of the University of São Paulo (HCFMRP-USP), Ribeirão Preto, Brazil
| | - Carlos Gilberto Carlotti Junior
- Department of Surgery and Neurosurgery, Hospital of Clinics of the Medical School of Ribeirão Preto of the University of São Paulo (HCFMRP-USP), Ribeirão Preto, Brazil
| | - João Pereira Leite
- Epilepsy Surgery Center (CIREP), Department of Neurosciences and Behavioral Sciences, Hospital of Clinics of the Medical School of Ribeirão Preto of the University of São Paulo (HCFMRP-USP), Ribeirão Preto, Brazil
| | - Antonio Carlos Dos Santos
- Department of Radiology, Hospital of Clinics of the Medical School of Ribeirão Preto of the University of São Paulo (HCFMRP-USP), Ribeirão Preto, Brazil
| | - Veriano Alexandre
- Epilepsy Surgery Center (CIREP), Department of Neurosciences and Behavioral Sciences, Hospital of Clinics of the Medical School of Ribeirão Preto of the University of São Paulo (HCFMRP-USP), Ribeirão Preto, Brazil
| | - Frederico Nakane Nakano
- Epilepsy Surgery Center (CIREP), Department of Neurosciences and Behavioral Sciences, Hospital of Clinics of the Medical School of Ribeirão Preto of the University of São Paulo (HCFMRP-USP), Ribeirão Preto, Brazil
| | - Ricardo Lutzky Saute
- Epilepsy Surgery Center (CIREP), Department of Neurosciences and Behavioral Sciences, Hospital of Clinics of the Medical School of Ribeirão Preto of the University of São Paulo (HCFMRP-USP), Ribeirão Preto, Brazil
| | - Lauro Wichert-Ana
- Epilepsy Surgery Center (CIREP), Department of Neurosciences and Behavioral Sciences, Hospital of Clinics of the Medical School of Ribeirão Preto of the University of São Paulo (HCFMRP-USP), Ribeirão Preto, Brazil
| | - Americo Ceiki Sakamoto
- Epilepsy Surgery Center (CIREP), Department of Neurosciences and Behavioral Sciences, Hospital of Clinics of the Medical School of Ribeirão Preto of the University of São Paulo (HCFMRP-USP), Ribeirão Preto, Brazil
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Cossu M, d'Orio P, Barba C, Asioli S, Cardinale F, Casciato S, Caulo M, Colicchio G, Consales A, D'Aniello A, De Benedictis A, De Palma L, Didato G, Di Gennaro G, Di Giacomo R, Esposito V, Guerrini R, Nichelatti M, Revay M, Rizzi M, Vatti G, Villani F, Zamponi N, Tassi L, Marras CE. Focal Cortical Dysplasia IIIa in Hippocampal Sclerosis-Associated Epilepsy: Anatomo-Electro-Clinical Profile and Surgical Results From a Multicentric Retrospective Study. Neurosurgery 2021; 88:384-393. [PMID: 32860416 DOI: 10.1093/neuros/nyaa369] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 06/24/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Hippocampal sclerosis (HS) may be associated with focal cortical dysplasia IIIa (FCD IIIa) in patients undergoing surgery for temporal lobe epilepsy (TLE). OBJECTIVE To investigate whether the anatomo-electro-clinical profile and surgical outcome in patients with HS-related TLE are affected by coexisting FCD IIIa. METHODS A total of 220 patients, operated in 5 centers, with at least 24 mo follow-up (FU), were retrospectively studied. Preliminary univariate and subsequent multivariate analyses were performed to investigate possible associations between several potential presurgical, surgical, and postsurgical predictors and different variables (Engel's class I and Engel's class Ia, co-occurrence of FCD IIIa). RESULTS At last available postoperative control (FU: range 24-95 mo, median 47 mo), 182 (82.7%) patients were classified as Engel's class I and 142 (64.5%) as Engel's class Ia. At multivariate analysis, extension of neocortical resection and postoperative electroencephalogram were significantly associated with Engel's class I, whereas length of FU had a significant impact on class Ia in the whole cohort and in isolated HS (iHS) patients, but not in the FCD IIIa group. No differences emerged in the anatomo-electro-clinical profile and surgical results between patients with FCD IIIa and with iHS. CONCLUSION Coexistence of FCD IIIa did not confer a distinct anatomo-electro-clinical profile to patients with HS-related epilepsy. Postoperative seizure outcome was similar in FCD IIIa and iHS cases. These findings indicate limited clinical relevance of FCD IIIa in HS-related epilepsy and might be useful for refining future FCD classifications. Further studies are needed to clarify the correlation of class Ia outcome with the duration of FU.
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Affiliation(s)
- Massimo Cossu
- "C. Munari" Epilepsy Surgery Center, Niguarda Hospital, Milan, Italy
| | - Piergiorgio d'Orio
- "C. Munari" Epilepsy Surgery Center, Niguarda Hospital, Milan, Italy.,Institute of Neuroscience, National Research Council, Parma, Italy
| | - Carmen Barba
- Neuroscience Department, Meyer Children's Hospital, University of Florence, Florence, Italy
| | - Sofia Asioli
- Department of Biomedical and Neuromotor Sciences, Section of Anatomic Pathology "M. Malpighi", Bellaria Hospital, Bologna, Italy
| | | | | | - Massimo Caulo
- Department of Neuroscience, Imaging and Clinical Sciences, "G. D'Annunzio" University, Chieti, Italy
| | | | - Alessandro Consales
- Division of Neurosurgery, IRCCS Giannina Gaslini Children's Hospital, Genoa, Italy
| | | | | | - Luca De Palma
- Department of Neuroscience and Neurorehabilitation, Bambino Gesù Children Hospital, Rome, Italy
| | - Giuseppe Didato
- Epilepsy Unit, IRCCS "C. Besta" Neurological Institute Foundation, Milan, Italy
| | | | - Roberta Di Giacomo
- Epilepsy Unit, IRCCS "C. Besta" Neurological Institute Foundation, Milan, Italy
| | - Vincenzo Esposito
- IRCCS Neuromed, Pozzilli (IS), Italy.,Department of Neurology and Psychiatry, Sapienza University, Rome, Italy
| | - Renzo Guerrini
- Neuroscience Department, Meyer Children's Hospital, University of Florence, Florence, Italy
| | | | - Martina Revay
- "C. Munari" Epilepsy Surgery Center, Niguarda Hospital, Milan, Italy
| | - Michele Rizzi
- "C. Munari" Epilepsy Surgery Center, Niguarda Hospital, Milan, Italy
| | - Giampaolo Vatti
- Department of Neurological and Sensorial Sciences, University of Siena, Siena, Italy
| | - Flavio Villani
- Epilepsy Unit, IRCCS "C. Besta" Neurological Institute Foundation, Milan, Italy.,Division of Neurophysiology and Epilepsy Centre, IRCCS San Martino Policlinic Hospital, Genoa, Italy
| | - Nelia Zamponi
- Child Neuropsychiatric Unit, University of Ancona, Ancona, Italy
| | - Laura Tassi
- "C. Munari" Epilepsy Surgery Center, Niguarda Hospital, Milan, Italy
| | - Carlo Efisio Marras
- Department of Neuroscience and Neurorehabilitation, Bambino Gesù Children Hospital, Rome, Italy
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Sone D, Sato N, Kimura Y, Maikusa N, Shigemoto Y, Matsuda H. Quantitative analysis of double inversion recovery and FLAIR signals in temporal lobe epilepsy. Epilepsy Res 2020; 170:106540. [PMID: 33385946 DOI: 10.1016/j.eplepsyres.2020.106540] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 11/29/2020] [Accepted: 12/22/2020] [Indexed: 11/29/2022]
Abstract
This study aimed to quantitatively compare the signals from double inversion recovery (DIR) and fluid-attenuated inversion recovery (FLAIR) in temporal lobe epilepsy (TLE) with a focus on anterior temporal lobe white matter abnormal signal (ATLAS) lesions. We recruited 59 patients with TLE (32 left, 27 right) and 24 healthy controls (HCs). All patients underwent 3T-MRI scans including 3D DIR and FLAIR images, and the images were normalized and compared among the three groups by the software program SPM 12. We also explored the association of the ATLAS with disease duration, seizure types, and the existence of hippocampal sclerosis (HS). As a result, compared to the HCs, there were significantly increased DIR signals in the ipsilateral anterior temporal white matter of both the left and right TLE patients. There was no significant signal difference in FLAIR images between the HCs and patients except for a trend-level increase in left TLE. There was also no significant association between the ATLAS and disease duration, seizure type, or HS. These results quantitatively confirmed the significant signal increases of DIR in the ipsilateral anterior temporal lobe in both left and right TLE, whereas FLAIR revealed no significant between-group differences. These findings may indicate greater usefulness of DIR compared to FLAIR for detecting ATLAS lesions.
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Affiliation(s)
- Daichi Sone
- Integrative Brain Imaging Center, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo, 187-8551, Japan; Department of Psychiatry, The Jikei University School of Medicine, 3-25-8, Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan.
| | - Noriko Sato
- Department of Radiology, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo, 187-8551, Japan.
| | - Yukio Kimura
- Department of Radiology, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo, 187-8551, Japan.
| | - Norihide Maikusa
- Integrative Brain Imaging Center, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo, 187-8551, Japan.
| | - Yoko Shigemoto
- Department of Radiology, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo, 187-8551, Japan.
| | - Hiroshi Matsuda
- Integrative Brain Imaging Center, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo, 187-8551, Japan.
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Beheshti I, Sone D, Maikusa N, Kimura Y, Shigemoto Y, Sato N, Matsuda H. FLAIR-Wise Machine-Learning Classification and Lateralization of MRI-Negative 18F-FDG PET-Positive Temporal Lobe Epilepsy. Front Neurol 2020; 11:580713. [PMID: 33224093 PMCID: PMC7669910 DOI: 10.3389/fneur.2020.580713] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 10/12/2020] [Indexed: 11/13/2022] Open
Abstract
Objective: In this study, we investigated the ability of fluid-attenuated inversion recovery (FLAIR) data coupled with machine-leaning algorithms to differentiate normal and epileptic brains and identify the laterality of focus side in temporal lobe epilepsy (TLE) patients with visually negative MRI. Materials and Methods: The MRI data were acquired on a 3-T MR system (Philips Medical Systems). After pre-proceeding stage, the FLAIR signal intensities were extracted from specific regions of interest, such as the amygdala, cerebral white matter, inferior temporal gyrus, middle temporal gyrus, parahippocampal gyrus, superior temporal gyrus, and temporal pole, and fed into a classification framework followed by a support vector machine as classifier. The proposed lateralization framework was assessed in a group of MRI-negative unilateral TLE patients (N = 42; 23 left TLE and 19 right TLE) and 34 healthy controls (HCs) based on a leave-one-out cross-validation strategy. Results: Using the FLAIR data, we obtained a 75% accuracy for discriminating the three groups, as well as 87.71, 83.01, and 76.19% accuracies for HC/right TLE, HC/left TLE, and left TLE/right TLE tasks, respectively. Interpretation: The experimental results show that FLAIR data can potentially be considered an informative biomarker for improving the pre-surgical diagnostic confidence in patients with MRI-negative TLE.
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Affiliation(s)
- Iman Beheshti
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB, Canada.,Cyclotron and Drug Discovery Research Center, Southern Tohoku Research Institute for Neuroscience, Koriyama, Japan
| | - Daichi Sone
- Integrative Brain Imaging Center, National Center of Neurology and Psychiatry, Kodaira, Japan.,Department of Clinical and Experimental Epilepsy, University College London Institute of Neurology, London, United Kingdom
| | - Norihide Maikusa
- Integrative Brain Imaging Center, National Center of Neurology and Psychiatry, Kodaira, Japan
| | - Yukio Kimura
- Department of Radiology, National Center of Neurology and Psychiatry, Kodaira, Japan
| | - Yoko Shigemoto
- Department of Radiology, National Center of Neurology and Psychiatry, Kodaira, Japan
| | - Noriko Sato
- Department of Radiology, National Center of Neurology and Psychiatry, Kodaira, Japan
| | - Hiroshi Matsuda
- Cyclotron and Drug Discovery Research Center, Southern Tohoku Research Institute for Neuroscience, Koriyama, Japan.,Department of Radiology, National Center of Neurology and Psychiatry, Kodaira, Japan
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8
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Wang K, Cao X, Wu D, Liao C, Zhang J, Ji C, Zhong J, He H, Chen Y. Magnetic resonance fingerprinting of temporal lobe white matter in mesial temporal lobe epilepsy. Ann Clin Transl Neurol 2019; 6:1639-1646. [PMID: 31359636 PMCID: PMC6764497 DOI: 10.1002/acn3.50851] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 05/21/2019] [Accepted: 07/02/2019] [Indexed: 12/15/2022] Open
Abstract
Objective Mesial temporal lobe epilepsy (MTLE) is a network disorder. We aimed to quantify the white matter alterations in the temporal lobe of MTLE patients with hippocampal sclerosis (MTLE‐HS) by using magnetic resonance fingerprinting (MRF), a novel imaging technique, which allows simultaneous measurements of multiple parameters with a single acquisition. Methods We consecutively recruited 27 unilateral MTLE‐HS patients and 22 healthy controls. Measurements including T1, T2, and PD values in the temporopolar white matter and temporal stem were recorded and analyzed. Results We found increased T2 value in both sides, and increased T1 value in the ipsilateral temporopolar white matter of MTLE‐HS patients, as compared with healthy controls. The T1 and T2 values were higher in the ipsilateral than the contralateral side. In the temporal stem, increased T1 and T2 values in the ipsilateral side of the MTLE‐HS patients were also observed. Only increased T2 values were observed in the contralateral temporal stem. No significant differences in PD values were observed in either the temporopolar white matter or temporal stem of the MTLE‐HS patients. Correlation analysis revealed that T1 and T2 values in the ipsilateral temporopolar white matter were negatively correlated with the age at epilepsy onset. Interpretation By using MRF, we were able to assess the alterations of T1 and T2 in the temporal lobe white matter of MTLE‐HS patients. MRF could be a promising imaging technique in identifying mild changes in MTLE patients, which might optimize the pre‐surgical evaluation and therapeutic interventions in these patients.
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Affiliation(s)
- Kang Wang
- Department of Neurology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiaozhi Cao
- Center for Brain Imaging Science and Technology, Key Laboratory for Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrumental Science, Zhejiang University, Hangzhou, China
| | - Dengchang Wu
- Department of Neurology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Congyu Liao
- Center for Brain Imaging Science and Technology, Key Laboratory for Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrumental Science, Zhejiang University, Hangzhou, China
| | - Jianfang Zhang
- Department of Neurology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Caihong Ji
- Department of Neurology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Jianhui Zhong
- Center for Brain Imaging Science and Technology, Key Laboratory for Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrumental Science, Zhejiang University, Hangzhou, China.,Department of Imaging Sciences, University of Rochester, Rochester, New York
| | - Hongjian He
- Center for Brain Imaging Science and Technology, Key Laboratory for Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrumental Science, Zhejiang University, Hangzhou, China
| | - Yanxing Chen
- Department of Neurology, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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