title: Long-term epilepsy surgery outcomes in patients with PET-positive, MRI-negative temporal lobe epilepsy.
abstract: This study compared the long-term efficacy of anterior temporal lobectomy (ATL) for the treatment of medically refractory temporal lobe epilepsy (TLE) in patients who presented with ipsilateral temporal PET hypometabolism and nonlesional magnetic resonance imaging (PET+/MRI-) with that in patients who had mesial temporal sclerosis (MTS) on MRI. We described the electroclinical, MRI, PET, and pathological characteristics and seizure outcome of 28 PET+/MRI--patients without discordant ictal and interictal electroencephalography (EEG) who underwent ATL (2004-2007) for medically refractory partial epilepsy while avoiding intracranial monitoring. The primary outcome was the percentages of Engel Class I outcomes at 2 and 5 years of PET+/MRI--patients compared with those of patients with MTS on MRI; neuropsychological testing was used as the secondary outcome. At 2-year follow-up, 21 (75%) patients in the PET+/MRI--group were in Engel Class I compared with 66 (75.9%) patients with MTS, and at 5-year follow-up, 20 (71.4%) patients in the PET+/MRI--group were in Engel Class I compared with 64 (73.6%) patients in the group with MTS. There were no significant differences between the groups at either time period. We concluded that normal MRI results should not preclude presurgical evaluations in patients with medically refractory TLE, as favorable long-term postoperative seizure outcomes are possible, especially in patients with unilateral anterior interictal epileptiform discharges and ipsilateral temporal PET hypometabolism.
authors.affiliation: Department of Neurosurgery, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou 350025, China. Electronic address: yangpengfan@outlook.com.
authors.forename: Peng-Fan
authors.initials: PF
authors.lastname: Yang
authors.affiliation: Department of Neurosurgery, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou 350025, China.
authors.forename: Jia-Sheng
authors.initials: JS
authors.lastname: Pei
authors.affiliation: Department of Neurosurgery, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou 350025, China.
authors.forename: Hui-Jian
authors.initials: HJ
authors.lastname: Zhang
authors.affiliation: Department of Epileptology, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou 350025, China.
authors.forename: Qiao
authors.initials: Q
authors.lastname: Lin
authors.affiliation: Department of Epileptology, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou 350025, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Mei
authors.affiliation: Department of Epileptology, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou 350025, China.
authors.forename: Zhong-Hui
authors.initials: ZH
authors.lastname: Zhong
authors.affiliation: Department of Neurosurgery, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou 350025, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Tian
authors.affiliation: Department of Epileptology, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou 350025, China.
authors.forename: Yan-Zeng
authors.initials: YZ
authors.lastname: Jia
authors.affiliation: Department of Neuroradiology, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou 350025, China.
authors.forename: Zi-Qian
authors.initials: ZQ
authors.lastname: Chen
authors.affiliation: Department of Pathology, Fuzhou General Hospital of Nanjing Command, PLA, Fuzhou 350025, China.
authors.forename: Zhi-Yong
authors.initials: ZY
authors.lastname: Zheng
mesh_terms: D000328:Adult; D038481:Anterior Temporal Lobectomy; D004569:Electroencephalography; D004833:Epilepsy, Temporal Lobe / Q000378:metabolism / Q000473:pathology / Q000503:physiopathology / Q000601:surgery; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D017063:Outcome Assessment, Health Care; D049268:Positron-Emission Tomography; D012008:Recurrence; D012640:Seizures / Q000503:physiopathology / Q000601:surgery*; D013997:Time Factors; D016896:Treatment Outcome
keywords: Anterior temporal lobectomy (ATL); Nonlesional MRI; Positron emission tomography (PET); Postoperative outcomes; Presurgical evaluation; Temporal lobe epilepsy