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Courtney MR, Antonic-Baker A, Chen Z, Sinclair B, Nicolo JP, Neal A, Marotta C, Bunyamin J, Law M, Kwan P, O'Brien TJ, Vivash L. Association of Localizing 18F-FDG-PET Hypometabolism and Outcome Following Epilepsy Surgery: Systematic Review and Meta-Analysis. Neurology 2024; 102:e209304. [PMID: 38626375 DOI: 10.1212/wnl.0000000000209304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2024] Open
Abstract
BACKGROUND AND OBJECTIVES Although commonly used in the evaluation of patients for epilepsy surgery, the association between the detection of localizing 18fluorine fluorodeoxyglucose PET (18F-FDG-PET) hypometabolism and epilepsy surgery outcome is uncertain. We conducted a systematic review and meta-analysis to determine whether localizing 18F-FDG-PET hypometabolism is associated with favorable outcome after epilepsy surgery. METHODS A systematic literature search was undertaken. Eligible publications included evaluation with 18F-FDG-PET before epilepsy surgery, with ≥10 participants, and those that reported surgical outcome at ≥12 months. Random-effects meta-analysis was used to calculate the odds of achieving a favorable outcome, defined as Engel class I, International League Against Epilepsy class 1-2, or seizure-free, with localizing 18F-FDG-PET hypometabolism, defined as concordant with the epilepsy surgery resection zone. Meta-regression was used to characterize sources of heterogeneity. RESULTS The database search identified 8,916 studies, of which 98 were included (total patients n = 4,104). Localizing 18F-FDG-PET hypometabolism was associated with favorable outcome after epilepsy surgery for all patients with odds ratio (OR) 2.68 (95% CI 2.08-3.45). Subgroup analysis yielded similar findings for those with (OR 2.64, 95% CI 1.54-4.52) and without epileptogenic lesion detected on MRI (OR 2.49, 95% CI 1.80-3.44). Concordance with EEG (OR 2.34, 95% CI 1.43-3.83), MRI (OR 1.69, 95% CI 1.19-2.40), and triple concordance with both (OR 2.20, 95% CI 1.32-3.64) was associated with higher odds of favorable outcome. By contrast, diffuse 18F-FDG-PET hypometabolism was associated with worse outcomes compared with focal hypometabolism (OR 0.34, 95% CI 0.22-0.54). DISCUSSION Localizing 18F-FDG-PET hypometabolism is associated with favorable outcome after epilepsy surgery, irrespective of the presence of an epileptogenic lesion on MRI. The extent of 18F-FDG-PET hypometabolism provides additional information, with diffuse hypometabolism associated with worse surgical outcome than focal 18F-FDG-PET hypometabolism. These findings support the incorporation of 18F-FDG-PET into routine noninvasive investigations for patients being evaluated for epilepsy surgery to improve epileptogenic zone localization and to aid patient selection for surgery.
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Affiliation(s)
- Merran R Courtney
- From the Department of Neuroscience (M.R.C., A.A.-B., Z.C., B.S., J.-P.N., A.N., C.M., J.B., M.L., P.K., T.J.O.B., L.V.), School of Translational Medicine, Monash University; Department of Neurology (M.R.C., B.S., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Alfred Health; Department of Neurology (M.R.C., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Royal Melbourne Hospital; Department of Radiology (M.L.), Alfred Health; Department of Electrical and Computer Systems Engineering (M.L.), Monash University; and Department of Medicine (P.K., T.J.O.B., L.V.), The University of Melbourne, Victoria, Australia
| | - Ana Antonic-Baker
- From the Department of Neuroscience (M.R.C., A.A.-B., Z.C., B.S., J.-P.N., A.N., C.M., J.B., M.L., P.K., T.J.O.B., L.V.), School of Translational Medicine, Monash University; Department of Neurology (M.R.C., B.S., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Alfred Health; Department of Neurology (M.R.C., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Royal Melbourne Hospital; Department of Radiology (M.L.), Alfred Health; Department of Electrical and Computer Systems Engineering (M.L.), Monash University; and Department of Medicine (P.K., T.J.O.B., L.V.), The University of Melbourne, Victoria, Australia
| | - Zhibin Chen
- From the Department of Neuroscience (M.R.C., A.A.-B., Z.C., B.S., J.-P.N., A.N., C.M., J.B., M.L., P.K., T.J.O.B., L.V.), School of Translational Medicine, Monash University; Department of Neurology (M.R.C., B.S., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Alfred Health; Department of Neurology (M.R.C., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Royal Melbourne Hospital; Department of Radiology (M.L.), Alfred Health; Department of Electrical and Computer Systems Engineering (M.L.), Monash University; and Department of Medicine (P.K., T.J.O.B., L.V.), The University of Melbourne, Victoria, Australia
| | - Benjamin Sinclair
- From the Department of Neuroscience (M.R.C., A.A.-B., Z.C., B.S., J.-P.N., A.N., C.M., J.B., M.L., P.K., T.J.O.B., L.V.), School of Translational Medicine, Monash University; Department of Neurology (M.R.C., B.S., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Alfred Health; Department of Neurology (M.R.C., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Royal Melbourne Hospital; Department of Radiology (M.L.), Alfred Health; Department of Electrical and Computer Systems Engineering (M.L.), Monash University; and Department of Medicine (P.K., T.J.O.B., L.V.), The University of Melbourne, Victoria, Australia
| | - John-Paul Nicolo
- From the Department of Neuroscience (M.R.C., A.A.-B., Z.C., B.S., J.-P.N., A.N., C.M., J.B., M.L., P.K., T.J.O.B., L.V.), School of Translational Medicine, Monash University; Department of Neurology (M.R.C., B.S., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Alfred Health; Department of Neurology (M.R.C., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Royal Melbourne Hospital; Department of Radiology (M.L.), Alfred Health; Department of Electrical and Computer Systems Engineering (M.L.), Monash University; and Department of Medicine (P.K., T.J.O.B., L.V.), The University of Melbourne, Victoria, Australia
| | - Andrew Neal
- From the Department of Neuroscience (M.R.C., A.A.-B., Z.C., B.S., J.-P.N., A.N., C.M., J.B., M.L., P.K., T.J.O.B., L.V.), School of Translational Medicine, Monash University; Department of Neurology (M.R.C., B.S., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Alfred Health; Department of Neurology (M.R.C., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Royal Melbourne Hospital; Department of Radiology (M.L.), Alfred Health; Department of Electrical and Computer Systems Engineering (M.L.), Monash University; and Department of Medicine (P.K., T.J.O.B., L.V.), The University of Melbourne, Victoria, Australia
| | - Cassandra Marotta
- From the Department of Neuroscience (M.R.C., A.A.-B., Z.C., B.S., J.-P.N., A.N., C.M., J.B., M.L., P.K., T.J.O.B., L.V.), School of Translational Medicine, Monash University; Department of Neurology (M.R.C., B.S., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Alfred Health; Department of Neurology (M.R.C., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Royal Melbourne Hospital; Department of Radiology (M.L.), Alfred Health; Department of Electrical and Computer Systems Engineering (M.L.), Monash University; and Department of Medicine (P.K., T.J.O.B., L.V.), The University of Melbourne, Victoria, Australia
| | - Jacob Bunyamin
- From the Department of Neuroscience (M.R.C., A.A.-B., Z.C., B.S., J.-P.N., A.N., C.M., J.B., M.L., P.K., T.J.O.B., L.V.), School of Translational Medicine, Monash University; Department of Neurology (M.R.C., B.S., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Alfred Health; Department of Neurology (M.R.C., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Royal Melbourne Hospital; Department of Radiology (M.L.), Alfred Health; Department of Electrical and Computer Systems Engineering (M.L.), Monash University; and Department of Medicine (P.K., T.J.O.B., L.V.), The University of Melbourne, Victoria, Australia
| | - Meng Law
- From the Department of Neuroscience (M.R.C., A.A.-B., Z.C., B.S., J.-P.N., A.N., C.M., J.B., M.L., P.K., T.J.O.B., L.V.), School of Translational Medicine, Monash University; Department of Neurology (M.R.C., B.S., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Alfred Health; Department of Neurology (M.R.C., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Royal Melbourne Hospital; Department of Radiology (M.L.), Alfred Health; Department of Electrical and Computer Systems Engineering (M.L.), Monash University; and Department of Medicine (P.K., T.J.O.B., L.V.), The University of Melbourne, Victoria, Australia
| | - Patrick Kwan
- From the Department of Neuroscience (M.R.C., A.A.-B., Z.C., B.S., J.-P.N., A.N., C.M., J.B., M.L., P.K., T.J.O.B., L.V.), School of Translational Medicine, Monash University; Department of Neurology (M.R.C., B.S., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Alfred Health; Department of Neurology (M.R.C., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Royal Melbourne Hospital; Department of Radiology (M.L.), Alfred Health; Department of Electrical and Computer Systems Engineering (M.L.), Monash University; and Department of Medicine (P.K., T.J.O.B., L.V.), The University of Melbourne, Victoria, Australia
| | - Terence J O'Brien
- From the Department of Neuroscience (M.R.C., A.A.-B., Z.C., B.S., J.-P.N., A.N., C.M., J.B., M.L., P.K., T.J.O.B., L.V.), School of Translational Medicine, Monash University; Department of Neurology (M.R.C., B.S., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Alfred Health; Department of Neurology (M.R.C., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Royal Melbourne Hospital; Department of Radiology (M.L.), Alfred Health; Department of Electrical and Computer Systems Engineering (M.L.), Monash University; and Department of Medicine (P.K., T.J.O.B., L.V.), The University of Melbourne, Victoria, Australia
| | - Lucy Vivash
- From the Department of Neuroscience (M.R.C., A.A.-B., Z.C., B.S., J.-P.N., A.N., C.M., J.B., M.L., P.K., T.J.O.B., L.V.), School of Translational Medicine, Monash University; Department of Neurology (M.R.C., B.S., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Alfred Health; Department of Neurology (M.R.C., J.-P.N., A.N., P.K., T.J.O.B., L.V.), Royal Melbourne Hospital; Department of Radiology (M.L.), Alfred Health; Department of Electrical and Computer Systems Engineering (M.L.), Monash University; and Department of Medicine (P.K., T.J.O.B., L.V.), The University of Melbourne, Victoria, Australia
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Widjaja E, Demoe L, Yossofzai O, Guttmann A, Tomlinson G, Rutka J, Snead OC, Sander B. Health Care System Costs Associated With Surgery and Medical Therapy for Children With Drug-Resistant Epilepsy in Ontario. Neurology 2022; 98:e1204-e1215. [PMID: 35169008 DOI: 10.1212/wnl.0000000000200026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 01/03/2022] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Improvement in seizure control after epilepsy surgery could lead to lower health care resource use and costs, but it is uncertain whether this could offset the high costs related to surgery. This study aimed to evaluate phase-specific and cumulative long-term health care costs of surgery compared to medical therapy in children with drug-resistant epilepsy from the health care payer perspective. METHODS Children who were evaluated for epilepsy surgery and treated with surgery or medical therapy from 2003 to 2018 at the Hospital for Sick Children in Toronto were identified from chart review and linked to their health administrative databases in Ontario, Canada. Inverse probability of treatment weighting with stabilized weights was used to balance the baseline covariates between the 2 groups. Patients were assigned to presurgery, surgery, short-term (first 2 years), intermediate-term (2-5 years), and long-term (>5 years) postsurgery care phases on the basis of treatment trajectory. Phase-specific and cumulative long-term health care costs were evaluated. Costs were converted from Canadian to US dollars year 2018 value. RESULTS There were 372 surgical and 258 medical patients. Costs were higher in surgical than medical patients for presurgery (3 and 39 weeks), surgery, and short-term care phase, and the attributable costs of surgery per 7 patient-days were $1,602 (95% CI $1,438-$1,785), $172 (95% CI $147-$185), $19,819 (95% CI $18,822-$20,932), and $28 (95% CI $22-$32), respectively. Costs were lower in surgical patients for intermediate- and long-term care phase, and the attributable costs were -$72 (95% CI -$124 to -$35) and -$94 (95% CI -$129 to -$63), respectively. In surgical patients, costs were highest for surgery followed by presurgery care phase, with hospitalizations accounting for the highest cost component. In medical patients, costs increased gradually from presurgery to long-term care phase. Cumulative costs were higher for surgical than medical patients in the first 7 years after surgery, but from 8 years on, costs were lower for surgical patients. DISCUSSION This study demonstrated the long-term economic benefits of epilepsy surgery compared to medical therapy for the health care system with the use of real-world data, which would justify the high costs of surgery. The results will support future economic evaluation comparing minimally invasive treatment such as laser therapy to surgery.
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Affiliation(s)
- Elysa Widjaja
- From the Institute of Health Policy, Management and Evaluation (E.W., A.G., G.T., B.H.S.) and Leong Centre for Healthy Children (A.G.), University of Toronto; Diagnostic Imaging (E.W.), Division of Neurology (E.W., O.C.S.), Neurosciences and Mental Health (L.D., O.Y.), Division of Pediatric Medicine (A.G.), and Department of Neurosurgery (J.R.), Hospital for Sick Children; ICES (E.W., A.G., B.H.S.); Toronto Health Economics and Technology Assessment (THETA) Collaborative (G.T., B.H.S.), University Health Network; and Public Health Ontario (B.H.S.), Toronto, Ontario, Canada.
| | - Lindsay Demoe
- From the Institute of Health Policy, Management and Evaluation (E.W., A.G., G.T., B.H.S.) and Leong Centre for Healthy Children (A.G.), University of Toronto; Diagnostic Imaging (E.W.), Division of Neurology (E.W., O.C.S.), Neurosciences and Mental Health (L.D., O.Y.), Division of Pediatric Medicine (A.G.), and Department of Neurosurgery (J.R.), Hospital for Sick Children; ICES (E.W., A.G., B.H.S.); Toronto Health Economics and Technology Assessment (THETA) Collaborative (G.T., B.H.S.), University Health Network; and Public Health Ontario (B.H.S.), Toronto, Ontario, Canada
| | - Omar Yossofzai
- From the Institute of Health Policy, Management and Evaluation (E.W., A.G., G.T., B.H.S.) and Leong Centre for Healthy Children (A.G.), University of Toronto; Diagnostic Imaging (E.W.), Division of Neurology (E.W., O.C.S.), Neurosciences and Mental Health (L.D., O.Y.), Division of Pediatric Medicine (A.G.), and Department of Neurosurgery (J.R.), Hospital for Sick Children; ICES (E.W., A.G., B.H.S.); Toronto Health Economics and Technology Assessment (THETA) Collaborative (G.T., B.H.S.), University Health Network; and Public Health Ontario (B.H.S.), Toronto, Ontario, Canada
| | - Astrid Guttmann
- From the Institute of Health Policy, Management and Evaluation (E.W., A.G., G.T., B.H.S.) and Leong Centre for Healthy Children (A.G.), University of Toronto; Diagnostic Imaging (E.W.), Division of Neurology (E.W., O.C.S.), Neurosciences and Mental Health (L.D., O.Y.), Division of Pediatric Medicine (A.G.), and Department of Neurosurgery (J.R.), Hospital for Sick Children; ICES (E.W., A.G., B.H.S.); Toronto Health Economics and Technology Assessment (THETA) Collaborative (G.T., B.H.S.), University Health Network; and Public Health Ontario (B.H.S.), Toronto, Ontario, Canada
| | - George Tomlinson
- From the Institute of Health Policy, Management and Evaluation (E.W., A.G., G.T., B.H.S.) and Leong Centre for Healthy Children (A.G.), University of Toronto; Diagnostic Imaging (E.W.), Division of Neurology (E.W., O.C.S.), Neurosciences and Mental Health (L.D., O.Y.), Division of Pediatric Medicine (A.G.), and Department of Neurosurgery (J.R.), Hospital for Sick Children; ICES (E.W., A.G., B.H.S.); Toronto Health Economics and Technology Assessment (THETA) Collaborative (G.T., B.H.S.), University Health Network; and Public Health Ontario (B.H.S.), Toronto, Ontario, Canada
| | - James Rutka
- From the Institute of Health Policy, Management and Evaluation (E.W., A.G., G.T., B.H.S.) and Leong Centre for Healthy Children (A.G.), University of Toronto; Diagnostic Imaging (E.W.), Division of Neurology (E.W., O.C.S.), Neurosciences and Mental Health (L.D., O.Y.), Division of Pediatric Medicine (A.G.), and Department of Neurosurgery (J.R.), Hospital for Sick Children; ICES (E.W., A.G., B.H.S.); Toronto Health Economics and Technology Assessment (THETA) Collaborative (G.T., B.H.S.), University Health Network; and Public Health Ontario (B.H.S.), Toronto, Ontario, Canada
| | - O Carter Snead
- From the Institute of Health Policy, Management and Evaluation (E.W., A.G., G.T., B.H.S.) and Leong Centre for Healthy Children (A.G.), University of Toronto; Diagnostic Imaging (E.W.), Division of Neurology (E.W., O.C.S.), Neurosciences and Mental Health (L.D., O.Y.), Division of Pediatric Medicine (A.G.), and Department of Neurosurgery (J.R.), Hospital for Sick Children; ICES (E.W., A.G., B.H.S.); Toronto Health Economics and Technology Assessment (THETA) Collaborative (G.T., B.H.S.), University Health Network; and Public Health Ontario (B.H.S.), Toronto, Ontario, Canada
| | - Beate Sander
- From the Institute of Health Policy, Management and Evaluation (E.W., A.G., G.T., B.H.S.) and Leong Centre for Healthy Children (A.G.), University of Toronto; Diagnostic Imaging (E.W.), Division of Neurology (E.W., O.C.S.), Neurosciences and Mental Health (L.D., O.Y.), Division of Pediatric Medicine (A.G.), and Department of Neurosurgery (J.R.), Hospital for Sick Children; ICES (E.W., A.G., B.H.S.); Toronto Health Economics and Technology Assessment (THETA) Collaborative (G.T., B.H.S.), University Health Network; and Public Health Ontario (B.H.S.), Toronto, Ontario, Canada
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Ma J, Wu J, Chen H, Chen Y, Xu D, Tian X, Jing W, Wang X. Response to antiepileptic drugs after unsuccessful epilepsy surgery: A multivariate analysis of 103 patients. Seizure 2020; 81:222-227. [PMID: 32862118 DOI: 10.1016/j.seizure.2020.08.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/30/2020] [Accepted: 08/13/2020] [Indexed: 12/31/2022] Open
Abstract
OBJECT Epilepsy patients may still have seizures after surgery, and there have been few studies on the response to antiepileptic drugs (AEDs) after surgery failure. The purpose of this study was to analyze the response to AEDs after unsuccessful epilepsy surgery. METHODS Patients who underwent unsuccessful epilepsy surgery between January 1999 and January 2019 were evaluated. Patient demographics, etiology, factors related to surgery and AED use patterns were assessed. RESULTS After excluding the 5 patients who were lost to follow-up and the 2 patients who died, the records of 103 consecutive patients were analyzed. Ninety patients (87.4 %) had seizure recurrence within one year after surgery, 2 (1.9 %) patients had recurrence from one year to two years after surgery, and 11 (10.7 %) patients had recurrence two or more years after surgery (2-10 years). After surgery failure, the patients tried at least 2 kinds of AEDs with different mechanisms for more than 2 years. The average total number of AEDs used was 5.97, the average number of AEDs used before surgery was 3.21, and the average number of AEDs used after surgery was 4.02. After retreatment with AEDs, 10 patients (9.7 %) were seizure-free, 18 patients' (17.5 %) seizures were alleviated, and 75 patients (72.8 %) had seizures as they did prior to the adjustments. The number of AEDs used before and after surgery and the total number of AEDs were not significantly different among the seizure free group, alleviated seizure group and no change group. There were no significant differences in seizure onset age, surgery age, etiology, time between seizure onset and surgery, magnetic resonance imaging, seizure type, localization and lateralization of the surgery site among the three groups. CONCLUSIONS The results showed that a small percentage of patients (27.2 %) who undergo unsuccessful epilepsy surgery benefit from AED adjustments; however, the vast majority of patients (72.8 %) do not benefit from AED adjustments.
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Affiliation(s)
- Junhong Ma
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
| | - Junhong Wu
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, 1Youyi Road, Chongqing, 400016, China
| | - Hongnian Chen
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, 1Youyi Road, Chongqing, 400016, China
| | - Yuanyuan Chen
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, 1Youyi Road, Chongqing, 400016, China
| | - Demei Xu
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, 1Youyi Road, Chongqing, 400016, China
| | - Xin Tian
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, 1Youyi Road, Chongqing, 400016, China.
| | - Wei Jing
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, 1Youyi Road, Chongqing, 400016, China; Department of Neurology, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Taiyuan, Shanxi, China.
| | - Xuefeng Wang
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China; Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, 1Youyi Road, Chongqing, 400016, China.
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