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Houston R, Desai S, Takayanagi A, Quynh Thu Tran C, Mortezaei A, Oladaskari A, Sourani A, Siddiqi I, Khodayari B, Ho A, Hariri O. A Multidisciplinary Update on Treatment Modalities for Metastatic Spinal Tumors with a Surgical Emphasis: A Literature Review and Evaluation of the Role of Artificial Intelligence. Cancers (Basel) 2024; 16:2800. [PMID: 39199573 PMCID: PMC11352440 DOI: 10.3390/cancers16162800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2024] [Revised: 07/16/2024] [Accepted: 07/29/2024] [Indexed: 09/01/2024] Open
Abstract
Spinal metastases occur in up to 40% of patients with cancer. Of these cases, 10% become symptomatic. The reported incidence of spinal metastases has increased in recent years due to innovations in imaging modalities and oncological treatments. As the incidence of spinal metastases rises, so does the demand for improved treatments and treatment algorithms, which now emphasize greater multidisciplinary collaboration and are increasingly customized per patient. Uniquely, we discuss the potential clinical applications of AI and NGS in the treatment of spinal metastases. Material and Methods: A PubMed search for articles published from 2000 to 2023 regarding spinal metastases and artificial intelligence in healthcare was completed. After screening for relevance, the key findings from each study were summarized in this update. Results: This review summarizes the evidence from studies reporting on treatment modalities for spinal metastases, including minimally invasive surgery (MIS), external beam radiation therapy (EBRT), stereotactic radiosurgery (SRS), CFR-PEEK instrumentation, radiofrequency ablation (RFA), next-generation sequencing (NGS), artificial intelligence, and predictive models.
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Affiliation(s)
- Rebecca Houston
- Department of Neurosurgery, Arrowhead Regional Medical Center, 400 N Pepper Ave, Colton, CA 92324, USA;
| | - Shivum Desai
- Department of Neurosurgery, Ascension Providence Hospital, 16001 W Nine Mile Rd, Southfield, MI 48075, USA;
| | - Ariel Takayanagi
- Department of Neurosurgery, Riverside University Health System, 26520 Cactus Ave, Moreno Valley, CA 92555, USA; (A.T.); (I.S.)
| | - Christina Quynh Thu Tran
- Kaiser Permanente Bernard J. Tyson School of Medicine, 98 S Los Robles Ave, Pasadena, CA 91101, USA;
| | - Ali Mortezaei
- Student Research Committee, Gonabad University of Medical Sciences, Gonabad 9P67+R29, Razavi Khorasan, Iran;
| | - Alireza Oladaskari
- School of Biological Sciences, University of California Irvine, 402 Physical Sciences Quad, Irvine, CA 92697, USA;
| | - Arman Sourani
- Department of Neurosurgery, Isfahan University of Medical Sciences, Hezar Jerib Avenue, Isfahan JM76+5M3, Isfahan, Iran;
- Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Hezar Jerib Avenue, Isfahan JM76+5M3, Isfahan, Iran
| | - Imran Siddiqi
- Department of Neurosurgery, Riverside University Health System, 26520 Cactus Ave, Moreno Valley, CA 92555, USA; (A.T.); (I.S.)
| | - Behnood Khodayari
- Department of Radiation Oncology, Kaiser Permanente Los Angeles Medical Center, 4867 W Sunset Blvd, Los Angeles, CA 90027, USA;
| | - Allen Ho
- Department of Neurological Surgery, Kaiser Permanente Orange County, 3440 E La Palma Ave, Anaheim, CA 92806, USA;
| | - Omid Hariri
- Department of Neurosurgery, Arrowhead Regional Medical Center, 400 N Pepper Ave, Colton, CA 92324, USA;
- Kaiser Permanente Bernard J. Tyson School of Medicine, 98 S Los Robles Ave, Pasadena, CA 91101, USA;
- Department of Neurological Surgery, Kaiser Permanente Orange County, 3440 E La Palma Ave, Anaheim, CA 92806, USA;
- Department of Surgery, Western University of Health Sciences, 309 E 2nd St, Pomona, CA 91766, USA
- Department of Orthopedic Surgery, University of California Irvine School of Medicine, 1001 Health Sciences Rd, Irvine, CA 92617, USA
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Poullay Silven M, Encarnación-Santos D, Volovish A, Nicoletti GF, Iacopino DG, Valerievich KA. Letter to the Editor Regarding "Minimally Invasive Surgery for Spinal Metastasis: A Review". World Neurosurg 2024; 184:358-359. [PMID: 38590068 DOI: 10.1016/j.wneu.2023.12.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 12/06/2023] [Indexed: 04/10/2024]
Affiliation(s)
- Manikon Poullay Silven
- Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in Neurologic Surgery, Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, Palermo, Italy; Department of Neurosurgery of People of Friendship University, Moscow, Russia
| | | | - Alexander Volovish
- Division of Vertebrology of NCC No. 2 (CCB RAS) FGBNU, RNTSKH in B.V. Petroskovo Academy, Moscow, Russia
| | | | - Domenico Gerardo Iacopino
- Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in Neurologic Surgery, Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, Palermo, Italy
| | - Kim-A Valerievich
- Deparment of Neurosurgery, City Clinical Hospital, Gbuz Gkb Im. V.P. Demikhova, Moscow, Russia
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Pullay Silven M, Nicoletti GF, Iacopino DG. Letter to the Editor Regarding "Patient-Tailored 3D-Printing Models in the Subspecialty Training of Spinal Tumors: A Comparative Study and Questionnaire Survey". World Neurosurg 2024; 181:194-195. [PMID: 38229282 DOI: 10.1016/j.wneu.2023.09.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 09/21/2023] [Indexed: 01/18/2024]
Affiliation(s)
- Manikon Pullay Silven
- Department of Biomedicine Neurosciences and Advanced Diagnostics, Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in Neurologic Surgery, School of Medicine, University of Palermo, Palermo, Italy.
| | | | - Domenico Gerardo Iacopino
- Department of Biomedicine Neurosciences and Advanced Diagnostics, Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in Neurologic Surgery, School of Medicine, University of Palermo, Palermo, Italy
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Poullay Silven M, Iacopino DG. Letter To The Editor Regarding "Virtual and Augmented Reality in Spine Surgery: A Systematic Review". World Neurosurg 2024; 181:204-205. [PMID: 38229287 DOI: 10.1016/j.wneu.2023.08.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 08/04/2023] [Indexed: 01/18/2024]
Affiliation(s)
- Manikon Poullay Silven
- Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in Neurologic Surgery, Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, Palermo, Italy.
| | - Domenico Gerardo Iacopino
- Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in Neurologic Surgery, Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, Palermo, Italy
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Aslan S, Al-Smadi MW, Kozma I, Viola Á. Enhanced Precision and Safety in Thermal Ablation: O-Arm Cone Beam Computed Tomography with Magnetic Resonance Imaging Fusion for Spinal Column Tumor Targeting. Cancers (Basel) 2023; 15:5744. [PMID: 38136290 PMCID: PMC10741908 DOI: 10.3390/cancers15245744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/06/2023] [Accepted: 12/06/2023] [Indexed: 12/24/2023] Open
Abstract
Spinal metastatic tumors are common and often cause debilitating symptoms. Image-guided percutaneous thermal ablation (IPTA) has gained significant recognition in managing spinal column tumors due to its exceptional precision and effectiveness. Conventional guidance modalities, including computed tomography, fluoroscopy, and ultrasound, have been important in targeting spinal column tumors while minimizing harm to adjacent critical structures. This study presents a novel approach utilizing a fusion of cone beam computed tomography with magnetic resonance imaging to guide percutaneous thermal ablation for four patients with secondary spinal column tumors. The visual analog scale (VAS) evaluated the procedure effectiveness during an 18-month follow-up. Percutaneous vertebroplasty was performed in two cases, and a thermostat was used during all procedures. Imaging was performed using the Stealth Station navigation system Spine 8 (SSS8) and a 1.5T MRI machine. The fusion of CBCT with MRI allowed for precise tumor localization and guidance for thermal ablation. Initial results indicate successful tumor ablation and symptom reduction, emphasizing the potential of CBCT-MRI fusion in spinal column tumor management. This innovative approach is promising in optimizing therapy for secondary spinal column tumors. Further studies are necessary to validate its efficacy and applicability.
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Affiliation(s)
- Siran Aslan
- Department of Neurotraumatology, Semmelweis University, 1081 Budapest, Hungary;
- Department of Neurosurgery and Neurotraumatology, Dr. Manninger Jenő National Traumatology Institute, 1081 Budapest, Hungary; (M.W.A.-S.); (I.K.)
- Doctoral School of Clinical Medicine, Semmelweis University, 1083 Budapest, Hungary
| | - Mohammad Walid Al-Smadi
- Department of Neurosurgery and Neurotraumatology, Dr. Manninger Jenő National Traumatology Institute, 1081 Budapest, Hungary; (M.W.A.-S.); (I.K.)
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary
- Department of Neurosurgery, Andras Josa Teaching Hospital, 4400 Nyiregyhaza, Hungary
| | - István Kozma
- Department of Neurosurgery and Neurotraumatology, Dr. Manninger Jenő National Traumatology Institute, 1081 Budapest, Hungary; (M.W.A.-S.); (I.K.)
| | - Árpad Viola
- Department of Neurotraumatology, Semmelweis University, 1081 Budapest, Hungary;
- Department of Neurosurgery and Neurotraumatology, Dr. Manninger Jenő National Traumatology Institute, 1081 Budapest, Hungary; (M.W.A.-S.); (I.K.)
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Hu H, Xu L, Guo X, Teng H, Liu W. CT-guided percutaneous microwave ablation combined with bone cement injection for the treatment of transverse metastases: A case report. Open Med (Wars) 2023; 18:20230753. [PMID: 37533735 PMCID: PMC10390749 DOI: 10.1515/med-2023-0753] [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: 11/30/2022] [Revised: 06/25/2023] [Accepted: 06/26/2023] [Indexed: 08/04/2023] Open
Abstract
Metastatic diseases of the spine are becoming increasingly common with an aging population and improvements in systemic cancer therapies. Microwave and vertebroplasty are the mainstay modalities for treating painful spine metastases. Most early spinal metastases predominantly attack the adnexa, but there are few reports on its treatment. This report presents a case of a 56-year-old female who had experienced severe thoracic back pain for several days and was diagnosed with a metastatic tumor of the right transverse process of T7. Percutaneous microwave ablation in combination with bone cement injection was used to treat the metastatic tumor under CT guidance. The postoperative pain on the Visual Analogue Scale was 1/10, without nerve or vessel damage and bone cement leakage during the operation.
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Affiliation(s)
- Hongtao Hu
- Department of Orthopedic Surgery, The Affiliated Hospital of Weifang Medical College, Weifang261000, Shandong, China
| | - Lei Xu
- Department of Orthopedic Surgery, The Affiliated Hospital of Weifang Medical College, Weifang261000, Shandong, China
| | - Xiang Guo
- Department of Orthopedic Surgery, The Affiliated Hospital of Weifang Medical College, Weifang261000, Shandong, China
| | - Haijun Teng
- Department of Orthopedic Surgery, The Affiliated Hospital of Weifang Medical College, Weifang261000, Shandong, China
| | - Wenhua Liu
- Department of Orthopedic Surgery, The Affiliated Hospital of Weifang Medical College, Weifang261000, Shandong, China
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Colonna S, Bianconi A, Cofano F, Prior A, Di Perna G, Palmieri G, Zona G, Garbossa D, Fiaschi P. Radiofrequency Ablation in Vertebral Body Metastasis with and without Percutaneous Cement Augmentation: A Systematic Review Addressing the Need for SPINE Stability Evaluation. Diagnostics (Basel) 2023; 13:diagnostics13061164. [PMID: 36980472 PMCID: PMC10046948 DOI: 10.3390/diagnostics13061164] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 02/25/2023] [Accepted: 03/15/2023] [Indexed: 03/30/2023] Open
Abstract
Vertebral body metastases (VBM) are one of the most frequent sites of bone metastasis, and their adequate therapeutic management still represents an insidious challenge for both oncologists and surgeons. A possible alternative treatment for VBM is radiofrequency ablation (RFA), a percutaneous technique in which an alternating current is delivered to the tumor lesion producing local heating and consequent necrosis. However, RFA alone could alter the biomechanics and microanatomy of the vertebral body, thus increasing the risk of post-procedure vertebral fractures and spine instability, and indeed the aim of the present study is to investigate the effects of RFA on spine stability. A systematic review according to PRISMA-P guidelines was performed, and 17 papers were selected for the systematic review. The results show how RFA is an effective, safe, and feasible alternative to conventional radiotherapy for the treatment of VBM without indication for surgery, but spine stability is a major issue in this context. Although exerting undeniable benefits on pain control and local tumor recurrence, RFA alone increases the risk of spine instability and consequent vertebral body fractures and collapses. Concomitant safe and feasible therapeutic strategies such as percutaneous vertebroplasty and kyphoplasty have shown synergic positive effects on back pain and improvement in spine stability.
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Affiliation(s)
- Stefano Colonna
- Section of Neurosurgery, Department of Neuroscience, AOU Città della Salute e della Scienza, University of Turin, Corso Bramante 88/90, 10126 Turin, Italy
| | - Andrea Bianconi
- Section of Neurosurgery, Department of Neuroscience, AOU Città della Salute e della Scienza, University of Turin, Corso Bramante 88/90, 10126 Turin, Italy
| | - Fabio Cofano
- Section of Neurosurgery, Department of Neuroscience, AOU Città della Salute e della Scienza, University of Turin, Corso Bramante 88/90, 10126 Turin, Italy
- Unità di Chirurgia Vertebrale, Humanitas Gradenigo Hospital, 10100 Turin, Italy
| | - Alessandro Prior
- Section of Neurosurgery, Department of Neuroscienze, Riabilitazione, Oftalmologia, Genetica e Scienze Materno-Infantili, IRCCS Policlinico San Martino, University of Geneva, Largo Rosanna Benzi, 10, 16132 Genova, Italy
| | - Giuseppe Di Perna
- Unità di Chirurgia Vertebrale, Casa di Cura Città di Bra, 12042 Cuneo, Italy
| | - Giuseppe Palmieri
- Section of Neurosurgery, Department of Neuroscience, AOU Città della Salute e della Scienza, University of Turin, Corso Bramante 88/90, 10126 Turin, Italy
| | - Gianluigi Zona
- Section of Neurosurgery, Department of Neuroscienze, Riabilitazione, Oftalmologia, Genetica e Scienze Materno-Infantili, IRCCS Policlinico San Martino, University of Geneva, Largo Rosanna Benzi, 10, 16132 Genova, Italy
| | - Diego Garbossa
- Section of Neurosurgery, Department of Neuroscience, AOU Città della Salute e della Scienza, University of Turin, Corso Bramante 88/90, 10126 Turin, Italy
| | - Pietro Fiaschi
- Section of Neurosurgery, Department of Neuroscienze, Riabilitazione, Oftalmologia, Genetica e Scienze Materno-Infantili, IRCCS Policlinico San Martino, University of Geneva, Largo Rosanna Benzi, 10, 16132 Genova, Italy
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Pusceddu C, Marsico S, Derudas D, Ballicu N, Melis L, de Felice C, Calabrese A, Santucci D, Faiella E. Percutaneous CT-Guided Microwave Ablation Combined with Pedicle Screw Fixation Followed by Vertebroplasty (MASFVA): Initial Experience of a Minimally Invasive Treatment of Vertebral Metastases with Extension to the Vertebral Pedicle. Curr Oncol 2023; 30:1663-1672. [PMID: 36826088 PMCID: PMC9955473 DOI: 10.3390/curroncol30020127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/25/2023] [Accepted: 01/27/2023] [Indexed: 01/31/2023] Open
Abstract
(1) Background: The aim of this study was to retrospectively evaluate the safety and efficacy of a combined CT-guided percutaneous microwave ablation (MWA) and pedicle screw fixation followed by vertebroplasty (MASFVA) for the treatment and stabilization of painful vertebral metastases with vertebral pedicle involvement. (2) Methods: from January 2013 to January 2017 11 patients with 16 vertebral metastatic lesions (7 men and 5 women; mean age, 65 ± 11 years) with vertebral metastases underwent CT-guided microwave ablation and screw fixation followed by vertebroplasty (MASFVA). Technical success, complication rate, pain evaluation using a visual analogue scale (VAS), Oswestry Disability Index (ODI) and local tumor control were examined. (3) Results: Technical success rate was 100%. No procedure-related major complications occurred. VAS score decreased from 6.8 ± 0.7 to 0.6 ± 0.6. ODI score decreased from 3.1 ± 0.7 to 1.2 ± 0.4. All patients could walk independently without neurological complication after one week from the procedure. No new bone fractures or local disease recurrence occurred during a median follow-up of 12 months. (4) Conclusions: Our results suggest that MWA and percutaneous pedicle screw fixation followed by vertebroplasty for the treatment of painful vertebral metastases is a safe and effective procedure for painful vertebral metastases with vertebral pedicle involvement, allowing pain relief and local tumor control.
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Affiliation(s)
- Claudio Pusceddu
- Department of Oncological and Interventional Radiology, Businco Hospital, Via Edward Jenner 1, 09121 Cagliari, Italy
| | - Salvatore Marsico
- Department of Radiology, Hospital del Mar, Pg. Marítim de la Barceloneta, 25, 29, 08003 Barcelona, Spain
| | - Daniele Derudas
- Department of Hematology, Businco Hospital, Via Edward Jenner 1, 09121 Cagliari, Italy
| | - Nicola Ballicu
- Department of Oncological and Interventional Radiology, Businco Hospital, Via Edward Jenner 1, 09121 Cagliari, Italy
| | - Luca Melis
- Nuclear Medicine Department, Businco Hospital, Via Edward Jenner 1, 09121 Cagliari, Italy
| | - Carlo de Felice
- Department of Radiological Sciences, Oncology and Pathology, Umberto I Hospital, Sapienza University of Rome, Viale del Policlinico 105, 00161 Rome, Italy
| | - Alessandro Calabrese
- Department of Radiological Sciences, Oncology and Pathology, Umberto I Hospital, Sapienza University of Rome, Viale del Policlinico 105, 00161 Rome, Italy
| | - Domiziana Santucci
- Department of Radiology, Sant’Anna Hospital, Via Ravona 20, San Fermo della Battaglia, 22042 Como, Italy
- Unit of Computer Systems and Bioinformatics, Department of Engineering, Campus Bio-medico University, Via Alvaro del Portillo 21, 00128 Rome, Italy
| | - Eliodoro Faiella
- Department of Radiology, Sant’Anna Hospital, Via Ravona 20, San Fermo della Battaglia, 22042 Como, Italy
- Correspondence: ; Tel.: +39-3314557202
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Ferini *G, Palmisciano P, Scalia G, Haider AS, Bin-Alamer O, Sagoo NS, Bozkurt I, Deora H, Priola SM, Aoun SG, Umana GE. The role of radiation therapy in the treatment of spine metastases from hepatocellular carcinoma: a systematic review and meta-analysis. Neurosurg Focus 2022; 53:E12. [DOI: 10.3171/2022.8.focus2255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 08/23/2022] [Indexed: 11/13/2022]
Abstract
OBJECTIVE
Spine hepatocellular carcinoma (HCC) metastases severely worsen quality of life and prognosis, with the role of radiotherapy being controversial. The authors systematically reviewed the literature on radiotherapy for spine metastatic HCCs.
METHODS
The PubMed, Scopus, Web of Science, and Cochrane databases were searched according to the PRISMA guidelines to include studies of radiotherapy for spine metastatic HCCs. Outcomes, complications, and local control were analyzed with indirect random-effect meta-analyses.
RESULTS
The authors included 12 studies comprising 713 patients. The median time interval from diagnosis of HCC to spine metastases was 12 months (range 0–105 months). Most lesions were thoracic (35.9%) or lumbar (24.7%). Radiotherapy was delivered with conventional external-beam (67.3%) or stereotactic (31.7%) techniques. The median dose was 30.3 Gy (range 12.5–52 Gy) in a median of 5 fractions (range 1–20 fractions). The median biologically effective dose was 44.8 Gy10 (range 14.4–112.5 Gy10). Actuarial rates of postradiotherapy pain relief and radiological response were 87% (95% CI 84%–90%) and 70% (95% CI 65%–75%), respectively. Radiation-related adverse events and vertebral fractures had actuarial rates of 8% (95% CI 5%–11%) and 16% (95% CI 10%–23%), respectively, with fracture rates significantly higher after stereotactic radiotherapy (p = 0.033). Fifty-eight patients (27.6%) had local recurrences after a median of 6.8 months (range 0.1–59 months), with pooled local control rates of 61.6% at 6 months and 40.8% at 12 months, and there were no significant differences based on radiotherapy type (p = 0.068). The median survival was 6 months (range 0.1–62 months), with pooled rates of 52.5% at 6 months and 23.4% at 12 months.
CONCLUSIONS
Radiotherapy in spine metastatic HCCs shows favorable rates of pain relief, radiological responses, and local control. Rates of postradiotherapy vertebral fractures are higher after high-dose stereotactic radiotherapy.
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Affiliation(s)
- *Gianluca Ferini
- Department of Radiation Oncology, REM Radioterapia srl, Viagrande, Catania, Italy
| | | | - Gianluca Scalia
- Department of Neurosurgery, Highly Specialized Hospital of National Importance "Garibaldi," Catania, Italy
| | - Ali S Haider
- Texas A&M University College of Medicine, Houston, Texas
| | - Othman Bin-Alamer
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Navraj S Sagoo
- Department of Orthopaedic Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Ismail Bozkurt
- Department of Neurosurgery, Cankiri State Hospital, Cankiri, Turkey
| | - Harsh Deora
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Stefano M Priola
- Division of Neurosurgery, Health Sciences North, Northern Ontario School of Medicine, Sudbury, Ontario, Canada
| | - Salah G Aoun
- Department of Neurosurgery, University of Texas Southwestern Medical Center, Dallas, Texas; and
| | - Giuseppe E Umana
- Department of Neurosurgery, Trauma Center, Gamma Knife Center, Cannizzaro Hospital, Catania, Italy
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