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Sotiropoulos A, Alexiou GA, Voulgaris S. Letter to the Editor Regarding “Glial Fibrillary Acidic Protein (GFAP) Outperforms S100 Calcium-Binding Protein B (S100B) and Ubiquitin C-Terminal Hydrolase L1 (UCH-L1) as Predictor for Positive Computed Tomography of the Head in Trauma Subjects”. World Neurosurg 2019; 131:294. [DOI: 10.1016/j.wneu.2019.06.237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 06/28/2019] [Accepted: 06/29/2019] [Indexed: 10/25/2022]
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Alexiou GA, Lianos GD, Sotiropoulos A, Voulgaris S. Novel biomarkers may aid the decision for CT scan in emergency settings in mild head trauma. Biomark Med 2019; 13:1055-1057. [DOI: 10.2217/bmm-2019-0277] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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Alexiou GA, Voulgaris S. Commentary: Surgical Resection of Cervical Meningioma: 3-Dimensional Operative Video. Oper Neurosurg (Hagerstown) 2019; 16:E165. [DOI: 10.1093/ons/opy322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 09/19/2018] [Indexed: 11/14/2022] Open
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Zigouris A, Konsolakis N, Alexiou G, Voulgaris S. A piece of wire into the brain. Asian J Neurosurg 2019; 14:333. [PMID: 30937070 PMCID: PMC6417316 DOI: 10.4103/ajns.ajns_46_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Triantafyllidi E, Papoudou-Bai A, Alexiou GA, Zikou A, Charchanti A, Konsolakis N, Skiada D, Voulgaris S, Goussia AC. Adult intradural extramedullary teratoma of the spinal cord: A case presentation. Clin Neurol Neurosurg 2018; 175:54-56. [DOI: 10.1016/j.clineuro.2018.10.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 10/01/2018] [Accepted: 10/14/2018] [Indexed: 10/28/2022]
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Alexiou GA, Voulgaris S. Letter to the Editor. Second cancer risk in patients with spinal ependymomas. J Neurosurg Spine 2018; 29:612-613. [PMID: 30141763 DOI: 10.3171/2018.6.spine18719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Zika J, Alexiou GA, Giannopoulos S, Kastanioudakis I, Kyritsis AP, Voulgaris S. Outcome factors in surgically treated patients for cervical spondylotic myelopathy. J Spinal Cord Med 2018; 43:206-210. [PMID: 30040606 PMCID: PMC7054977 DOI: 10.1080/10790268.2018.1500225] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Abstract
Context/Objective: To investigate prospectively preoperative parameters that might be related to the outcome of surgically treated patients for cervical spondylotic myelopathy (CSM).Design: Prospective study.Setting: Single Center in Ioannina, Greece.Participants: Thirty-six patients were included in the study. There were 21 males and 15 females, mean age 50.8 years, range 39-70 years. The mean BMI was 27.3.Outcome measures: From each patient, we recorded age, sex, BMI, symptoms, duration of symptoms, comorbidities, lifestyle, myelopathy grade based on MRI and levels of compression. All patients completed the modified JOA (mJOA) and NPE questionnaires preoperatively and at 1, 3, 12 months and 5-years postoperatively.Results: The mean mJOA score significant improved from 10.8 ± 1.9 points preoperatively to 16.6 ± 2.2 points at 12 months postoperatively. The mean mJOA score at 5-years postoperatively was 15.5 ± 3 points. The difference was still highly significant. The mean NPE score significant improved from 59.8 ± 12.2 points preoperatively to 28.2 ± 8.5 points at 1 month, to 35.8 ± 8.1 points at 3 month and to 28.2 ± 8.8 points at 12 months postoperatively. Younger patients had significant higher baseline mJOA scores and significant higher mJOA scores 5-year postoperatively. No correlation was found between sex, BMI, symptom duration, baseline mJOA or myelopathy grade and outcome at 12 months or 5-year postoperatively.Conclusion: Age was highly predictive factor of outcome for patients undergoing surgical treatment of CSM.
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Zigouris A, Alexiou GA, Themistocleous MS, Voulgaris S. AED Strategy after Refractory Epilepsy Surgery. Curr Pharm Des 2017; 23:6505-6507. [PMID: 29086677 DOI: 10.2174/1381612823666171030154449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 10/20/2017] [Accepted: 10/25/2017] [Indexed: 11/22/2022]
Abstract
Post-epilepsy surgery antiepileptic drug discontinuation (AED) practices remain unclear and little evidence about the optimum timing exists. In the present study, we reviewed the types of surgery for epilepsy and their outcome. The current concepts for discontinuation of AED after surgery are presented and all contributing factors that should be taken into consideration are discussed.
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Alexiou GA, Vartholomatos G, Markopoulos GS, Voulgaris S, Kyritsis AP. Effectiveness of flow cytometry for brain tumor excision. Photodiagnosis Photodyn Ther 2017; 18:323-324. [PMID: 28457850 DOI: 10.1016/j.pdpdt.2017.04.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Accepted: 04/26/2017] [Indexed: 10/19/2022]
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Vartholomatos G, Alexiou G, Voulgaris S, Kyritsis A. SURG-42. “GV/GA SARISSA-LANCET” AN INNOVATIVE DEVICE FOR THE IDENTIFICATION OF GLIOMA MARGINS. Neuro Oncol 2016. [DOI: 10.1093/neuonc/now212.840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Zikou A, Alexiou GA, Goussia A, Kosta P, Xydis V, Voulgaris S, Kyritsis AP, Argyropoulou MI. The role of diffusion tensor imaging and dynamic susceptibility perfusion MRI in the evaluation of meningioma grade and subtype. Clin Neurol Neurosurg 2016; 146:109-15. [DOI: 10.1016/j.clineuro.2016.05.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 04/25/2016] [Accepted: 05/03/2016] [Indexed: 10/21/2022]
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Alexiou GA, Vartholomatos G, Voulgaris S, Kyritsis AP. Letter: Glioblastoma Resection Guided by Flow Cytometry. Neurosurgery 2016; 78:E761. [PMID: 26909806 DOI: 10.1227/neu.0000000000001218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Alexiou GA, Vartholomatos G, Voulgaris S, Kyritsis AP. Letter to the Editor: Intraoperative detection of glioma cells by flow cytometry. J Neurosurg 2015; 124:587-8. [PMID: 26684778 DOI: 10.3171/2015.8.jns151892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Pachatouridis D, Alexiou GA, Zigouris A, Michos E, Drosos D, Fotakopoulos G, Voulgaris S. Management of hydrocephalus after decompressive craniectomy. Turk Neurosurg 2015; 24:855-8. [PMID: 25448200 DOI: 10.5137/1019-5149.jtn.8871-13.1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
AIM We set out to investigate the optimal timing for shunt placement in patients with hydrocephalus after decompressive craniectomy (DC). MATERIAL AND METHODS We studied 63 consecutive patients that underwent DC because of traumatic brain injury, middle cerebral artery infarct or intracerebral hemorrhage. Hydrocephalus was diagnosed in 23/63 patients. The 23 patients were divided into two groups. The first group (A) consisted of 11 patients in whom a ventriculoperitoneal shunt was placed simultaneously or before cranioplasty. In the second group (B) of 12 patients, we performed cranioplasty and a ventriculostomy with monitoring of intracranial pressure was placed simultaneously. After 3 to 5 days, a ventriculoperitoneal shunt was placed with the most appropriate opening pressure. RESULTS In group A, nine out of the eleven patients experienced complications, mainly hygromas or hematomas that required reoperation. In group B, none of the patients was reoperated. The use of programmable valves allowed for non-invasive revision of the opening pressure when required. CONCLUSION Cranioplasty and ventriculostomy followed by a second stage placement of a ventriculoperitoneal shunt are associated with fewer complications in the treatment of hydrocephalus after DC.
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Vartholomatos G, Alexiou GA, Gerogianni P, Lykoudis E, Voulgaris S, Kyritsis AP. Is there a role for intraoperative flow cytometry in brain tumor surgery? CYTOMETRY PART B-CLINICAL CYTOMETRY 2015; 88:289-90. [DOI: 10.1002/cyto.b.21235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 01/22/2015] [Accepted: 02/20/2015] [Indexed: 11/11/2022]
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Vartholomatos G, Alexiou GA, Batistatou A, Lykoudis E, Voulgaris S, Kyritsis AP. GV/GA Sarissa-Lancet. Surg Innov 2015; 23:104-5. [DOI: 10.1177/1553350615589860] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Alexiou GA, Vartholomatos G, Goussia A, Batistatou A, Tsamis K, Voulgaris S, Kyritsis AP. Fast cell cycle analysis for intraoperative characterization of brain tumor margins and malignancy. J Clin Neurosci 2015; 22:129-32. [DOI: 10.1016/j.jocn.2014.05.029] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 05/11/2014] [Indexed: 01/08/2023]
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Alexiou G, Kallinteri A, Levidiotou S, Michos E, Pachatouridis D, Priavali E, Voulgaris S, Zagorianakou P. The influence of postoperative infection in survival of patients with high-grade gliomas. ACTA ACUST UNITED AC 2015. [DOI: 10.4103/2347-8659.149418] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Vartholomatos G, Alexiou GA, Batistatou A, Lykoudis E, Voulgaris S, Kyritsis AP. Rapid cell cycle analysis for intraoperative diagnosis of brain tumors. Brain Tumor Pathol 2014; 32:151-2. [DOI: 10.1007/s10014-014-0201-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Accepted: 09/23/2014] [Indexed: 10/24/2022]
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Alexiou GA, Pachatouridis D, Michos E, Voulgaris S. Letter to the editor. Timing of shunt placement after cranioplasty. J Neurosurg 2014; 121:1007. [PMID: 25105703 DOI: 10.3171/2014.4.jns14721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Alexiou GA, Lianos G, Fotakopoulos G, Michos E, Pachatouridis D, Voulgaris S. Admission glucose and coagulopathy occurrence in patients with traumatic brain injury. Brain Inj 2014; 28:438-41. [DOI: 10.3109/02699052.2014.888769] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Alexiou G, Vartholomatos E, Voulgaris S, Zagorianakou P. Prognostic significance of neutrophil-to-lymphocyte ratio in glioblastoma. ACTA ACUST UNITED AC 2014. [DOI: 10.4103/2347-8659.143666] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Alexiou G, Karamoutsios A, Lallas G, Ragos V, Goussia A, Kyritsis A, Voulgaris S, Vartholomatos G. Expression of heat shock proteins in brain tumors. Turk Neurosurg 2014; 24:745-9. [DOI: 10.5137/1019-5149.jtn.9852-13.0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Alexiou GA, Zikou A, Tsiouris S, Goussia A, Kosta P, Papadopoulos A, Voulgaris S, Kyritsis AP, Fotopoulos AD, Argyropoulou MI. Correlation of diffusion tensor, dynamic susceptibility contrast MRI and (99m)Tc-Tetrofosmin brain SPECT with tumour grade and Ki-67 immunohistochemistry in glioma. Clin Neurol Neurosurg 2013; 116:41-5. [PMID: 24309151 DOI: 10.1016/j.clineuro.2013.11.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 08/03/2013] [Accepted: 11/09/2013] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Assessment of the grade and type of glioma is of paramount importance for prognosis. Tumour proliferative potentials may provide additional information on the behaviour of the tumour, its response to treatment and prognosis. The purpose of this study was to investigate the correlation between diffusion tensor imaging (DTI), dynamic susceptibility contrast (DSC) magnetic resonance imaging (MRI) and (99m)Tc-Tetrofosmin brain single-photon emission computed tomography (SPECT), and the tumour grade and Ki-67 labelling index in newly diagnosed gliomas. METHODS Study was made of patients with suspected glioma on brain MRI between December 2010 and January 2012, by DTI, DSC MRI and (99m)Tc-Tetrofosmin brain SPECT. The proliferative activity of each tumour was measured by deriving the Ki-67 proliferation index from immunohistochemical staining of tumour specimens. RESULTS Glioma was newly diagnosed in 25 patients (17 men, 8 women, aged 19-79 years, median 55 years). The Ki-67 index ranged from 1% to 80% (mean 19.4%). On evaluation of the relationship between the (99m)Tc-Tetrofosmin tumour uptake by gliomas was found to be significantly correlated with cellular proliferation (rho=0.924, p<0.0001). Regarding DTI, significant negative correlation was demonstrated between the apparent diffusion coefficient (ADC) ratio and the Ki-67 index (rho=-0.545, p=0.0087). Significant correlation was also observed between the fractional anisotropy (FA) ratio and the Ki-67 index (rho=0.489, p=0.02). Strong correlation was found between relative cerebral blood volume (rCBV) and Ki-67 index (rho=0.853, p<0.0001), and between the (99m)Tc-Tetrofosmin lesion-to-normal (L/N) uptake ratio and rCBV (rho=0.808, p ≤ 0.0001). Significant negative correlation was demonstrated between the (99m)Tc-Tetrofosmin L/N ratio and ADC ratio (rho=-0.513, p=0.014). These imaging techniques were able to distinguish between low-grade and high-grade gliomas. CONCLUSIONS Findings on DSC MRI and brain SPECT with (99m)Tc-Tetrofosmin metrics were more closely correlated with glioma cellular proliferation.
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