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Öhlén E, El-Hajj VG, Fletcher-Sandersjöö A, Edström E, Elmi-Terander A. Clinical course and predictors of outcome following surgical treatment of benign peripheral nerve sheath tumors, a single center retrospective study. Int J Neurosci 2024:1-7. [PMID: 38618859 DOI: 10.1080/00207454.2024.2342977] [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: 11/25/2023] [Accepted: 04/09/2024] [Indexed: 04/16/2024]
Abstract
INTRODUCTION Peripheral nerve sheath tumors are the most common tumor of the peripheral nerves. In general, surgery has a favorable outcome and is the treatment of choice. However, postoperative neurologic deficits are not uncommon, and predictors of outcome are poorly defined. OBJECTIVE To evaluate clinical outcomes after surgical treatment of benign peripheral nerve sheath tumors and identify outcome predictors that may affect preoperative decision making and improve surgical outcomes. METHOD In this single center retrospective study, all patients surgically treated for a benign peripheral nerve sheath tumor between 2005 and 2020 were eligible for inclusion. Medical records and imaging data were reviewed. Studied outcomes were changes in neurological symptoms, pain, and tumor recurrence. Logistic regression was performed to identify possible outcome predictors. RESULTS In total, 81 patients undergoing 85 separate surgeries for benign peripheral nerve sheath tumors were included. The most common preoperative symptoms were local pain (90%) followed by a noticeable mass (78%), radiating pain (72%), sensory deficit (18%), and motor deficit (16%). A postoperative improvement of symptoms was seen in 94% of those with pain, 48% of those with sensory deficits and 78% of those with motor deficits. However, 35% and 9% developed new postoperative sensory and motor deficits, respectively. Multivariable analysis showed complete tumor removal as a predictor of reduced pain (p = 0.033), and younger age and larger tumors were risk factors for persistent or increased sensory deficits (p = 0.002 and p = 0.005, respectively). There were no significant predictors of motor deficits. Neurocutaneous syndromes were associated with increased odds of tumor recurrence on univariable analysis (p = 0.008). CONCLUSION Surgery of benign peripheral nerve sheath tumors is a safe procedure with a favorable outcome in most cases. Younger age and larger tumors were risk factors for persistent or increased sensory deficits, while complete tumor removal was associated with reduced pain. Patients with neurocutaneous syndromes had a higher rate of tumor recurrence. To further evaluate outcome predictors, we recommend future studies to focus on longer follow-up periods to assess the natural course of postoperative neurological deficits.
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Affiliation(s)
- Erik Öhlén
- Department of Pediatrics, Mälar Hospital, Eskilstuna, Sweden
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | | | | | - Erik Edström
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Capio Spine Center Stockholm, Löwenströmska Hospital, Upplands-Väsby, Sweden
- Department of Medical Sciences, Örebro University, Örebro, Sweden
| | - Adrian Elmi-Terander
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Capio Spine Center Stockholm, Löwenströmska Hospital, Upplands-Väsby, Sweden
- Department of Medical Sciences, Örebro University, Örebro, Sweden
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
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Debs P, Luna R, Fayad LM, Ahlawat S. MRI features of benign peripheral nerve sheath tumors: how do sporadic and syndromic tumors differ? Skeletal Radiol 2024; 53:709-723. [PMID: 37845504 DOI: 10.1007/s00256-023-04479-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/20/2023] [Accepted: 10/06/2023] [Indexed: 10/18/2023]
Abstract
OBJECTIVES To compare MRI features of sporadic and neurofibromatosis syndrome-related localized schwannomas and neurofibromas. METHODS In this retrospective study, our pathology database was searched for "neurofibroma" or "schwannoma" from 2014 to 2019. Exclusion criteria were lack of available MRI and intradural or plexiform tumors. Qualitative and quantitative anatomic (location, size, relationship to nerve, signal, muscle denervation) and functional (arterial enhancement, apparent diffusion-weighted coefficient) MRI features of sporadic and syndrome-related tumors were compared. Statistical significance was assumed for p < 0.05. RESULTS A total of 80 patients with 64 schwannomas (sporadic: 42 (65.6%) v. syndrome-related: 22 (34.4%)) and 19 neurofibromas (sporadic: 7 (36.8%) v. syndrome-related: 12 (41.7%)) were included. Only signal heterogeneity (T2W p=0.001, post-contrast p=0.03) and a diffused-weighted imaging target sign (p=0.04) were more frequent with schwannomas than neurofibromas. Sporadic schwannomas were similar in size to syndrome-related schwannomas (2.9±1.2cm vs. 3.7±3.2 cm, p = 0.6), but with greater heterogeneity (T2W p = 0.02, post-contrast p = 0.01). Sporadic neurofibromas were larger (4.6±1.5cm vs. 3.4±2.4 cm, p = 0.03) than syndrome-related neurofibromas, also with greater heterogeneity (T2W p=0.03, post-contrast p=0.04). Additional tumors along an affected nerve were only observed with syndrome-related tumors). There was no difference in apparent diffusion coefficient values or presence of early perfusion between sporadic and syndrome-related tumors (p > 0.05). CONCLUSIONS Although syndrome-related and sporadic schwannomas and neurofibromas overlap in their anatomic, diffusion and perfusion features, signal heterogeneity and presence of multiple lesions along a nerve are differentiating characteristics of syndrome-related tumors.
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Affiliation(s)
- Patrick Debs
- The Russell H. Morgan Department of Radiology & Radiological Science, The Johns Hopkins Medical Institutions, 600 North Wolfe Street, Baltimore, MD, 21287, USA.
| | - Rodrigo Luna
- The Russell H. Morgan Department of Radiology & Radiological Science, The Johns Hopkins Medical Institutions, 600 North Wolfe Street, Baltimore, MD, 21287, USA
| | - Laura M Fayad
- The Russell H. Morgan Department of Radiology & Radiological Science, The Johns Hopkins Medical Institutions, 600 North Wolfe Street, Baltimore, MD, 21287, USA
- Division of Orthopaedic Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Shivani Ahlawat
- The Russell H. Morgan Department of Radiology & Radiological Science, The Johns Hopkins Medical Institutions, 600 North Wolfe Street, Baltimore, MD, 21287, USA
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Becker H, Vogelsberg A, Feucht D, Estler A, Tafrali D, Schittenhelm J, Milla J, Kurz S, Fend F, Tatagiba M, Schuhmann MU, Hurth H. Case report: Solitary mass of the sciatic nerve confirmed as a primary extranodal manifestation of diffuse large B-cell lymphoma in a geriatric patient. Front Oncol 2024; 14:1354073. [PMID: 38585009 PMCID: PMC10995294 DOI: 10.3389/fonc.2024.1354073] [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: 12/11/2023] [Accepted: 03/12/2024] [Indexed: 04/09/2024] Open
Abstract
Background Neoplastic lesions affecting peripheral nerves are rare in the general population and, most often, are benign peripheral nerve sheath tumors. However, a minority of lesions represent high-grade malignancies associated with a poor prognosis, such as malignant peripheral nerve sheath tumors (MPNSTs). Very rarely, these tumors represent peripheral non-nerve sheath tumors (PNNSTs), such as hematological neoplasms that impair nerve function. These can be hard to distinguish from MPNSTs and other lesions arising from the nerve itself. In the present case report, we describe a rare case of direct infiltration of nerves by tumor cells of a hematological neoplasm. Methods We report the case of a 90-year-old woman with acute onset of right-sided foot palsy, sensory loss, and pain, caused by an extensive solitary mass of the sciatic nerve in the thigh. We present and discuss the clinical presentation, multimodal diagnostic procedures, and treatment. Results MRI of the right thigh and the caudal pelvis revealed a contrast-enhancing lesion infiltrating the sciatic nerve. Additionally performed staging imaging was non-revealing. After multidisciplinary discussion in the neuro-oncology tumor board, a MPNST was suspected and the patient underwent radical tumor resection. However, final histopathology revealed a diffuse large B-cell lymphoma (DLBCL). The patient received adjuvant palliative local radiotherapy which led to acceptable symptom control. Conclusion Rare PNNSTs, including extranodal manifestations of DLBCL can have similar clinical and radiological diagnostical features as PNSTs. Comprehensive diagnostic workup of contrast-enhancing lesions affecting peripheral nerves including MRI and metabolic imaging are recommended. Discussion in interdisciplinary tumor boards facilitates finding individual treatment approaches.
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Affiliation(s)
- Hannes Becker
- Department of Neurosurgery, University Hospital Tuebingen, Eberhard Karls University Tuebingen, Tuebingen, Germany
- Department of Neurology & Interdisciplinary Neuro-Oncology, Hertie Institute for Clinical Brain Research, Center for Neuro-Oncology, Comprehensive Cancer Center, University Hospital Tuebingen, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Antonio Vogelsberg
- Department of Pathology and Neuropathology, University Hospital and Comprehensive Cancer Center Tuebingen, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Daniel Feucht
- Department of Neurosurgery, University Hospital Tuebingen, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Arne Estler
- Diagnostic and Interventional Neuroradiology, Department of Radiology, University Hospital of Tuebingen, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Deniz Tafrali
- Department of Neuropathology, University Hospital Tuebingen, Eberhard Karls University Tübingen, Tuebingen, Germany
| | - Jens Schittenhelm
- Department of Neuropathology, University Hospital Tuebingen, Eberhard Karls University Tübingen, Tuebingen, Germany
| | - Jakob Milla
- Department of Pathology and Neuropathology, University Hospital and Comprehensive Cancer Center Tuebingen, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Sylvia Kurz
- Department of Neurology & Interdisciplinary Neuro-Oncology, Hertie Institute for Clinical Brain Research, Center for Neuro-Oncology, Comprehensive Cancer Center, University Hospital Tuebingen, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Falko Fend
- Department of Pathology and Neuropathology, University Hospital and Comprehensive Cancer Center Tuebingen, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Marcos Tatagiba
- Department of Neurosurgery, University Hospital Tuebingen, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Martin U. Schuhmann
- Department of Neurosurgery, University Hospital Tuebingen, Eberhard Karls University Tuebingen, Tuebingen, Germany
- Division of Pediatric Neurosurgery, Department of Neurosurgery, University Hospital of Tuebingen, Eberhard Karls University of Tuebingen, Tuebingen, Germany
| | - Helene Hurth
- Department of Neurosurgery, University Hospital Tuebingen, Eberhard Karls University Tuebingen, Tuebingen, Germany
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Pellerino A, Verdijk RM, Nichelli L, Andratschke NH, Idbaih A, Goldbrunner R. Diagnosis and Treatment of Peripheral and Cranial Nerve Tumors with Expert Recommendations: An EUropean Network for RAre CANcers (EURACAN) Initiative. Cancers (Basel) 2023; 15:cancers15071930. [PMID: 37046591 PMCID: PMC10093509 DOI: 10.3390/cancers15071930] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 03/12/2023] [Accepted: 03/21/2023] [Indexed: 04/14/2023] Open
Abstract
The 2021 WHO classification of the CNS Tumors identifies as "Peripheral nerve sheath tumors" (PNST) some entities with specific clinical and anatomical characteristics, histological and molecular markers, imaging findings, and aggressiveness. The Task Force has reviewed the evidence of diagnostic and therapeutic interventions, which is particularly low due to the rarity, and drawn recommendations accordingly. Tumor diagnosis is primarily based on hematoxylin and eosin-stained sections and immunohistochemistry. Molecular analysis is not essential to establish the histological nature of these tumors, although genetic analyses on DNA extracted from PNST (neurofibromas/schwannomas) is required to diagnose mosaic forms of NF1 and SPS. MRI is the gold-standard to delineate the extension with respect to adjacent structures. Gross-total resection is the first choice, and can be curative in benign lesions; however, the extent of resection must be balanced with preservation of nerve functioning. Radiotherapy can be omitted in benign tumors after complete resection and in NF-related tumors, due to the theoretic risk of secondary malignancies in a tumor-suppressor syndrome. Systemic therapy should be considered in incomplete resected plexiform neurofibromas/MPNSTs. MEK inhibitor selumetinib can be used in NF1 children ≥2 years with inoperable/symptomatic plexiform neurofibromas, while anthracycline-based treatment is the first choice for unresectable/locally advanced/metastatic MPNST. Clinical trials on other MEK1-2 inhibitors alone or in combination with mTOR inhibitors are under investigation in plexiform neurofibromas and MPNST, respectively.
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Affiliation(s)
- Alessia Pellerino
- Division of Neuro-Oncology, Department of Neuroscience "Rita Levi Montalcini", University and City of Health and Science Hospital, 10126 Turin, Italy
| | - Robert M Verdijk
- Department of Pathology, Section Ophthalmic Pathology, Erasmus MC University Medical Center Rotterdam, 3015 Rotterdam, The Netherlands
- Department of Pathology, Leiden University Medical Center, 2333 Leiden, The Netherlands
| | - Lucia Nichelli
- Department of Neuroradiology, Sorbonne Université, 75005 Paris, France
- Assistance Publique-Hôpitaux de Paris, 75610 Paris, France
- Groupe Hospitalier Pitié-Salpêtrière-Charles Foix, 75013 Paris, France
| | - Nicolaus H Andratschke
- Department of Radiation Oncology, University Hospital Zurich, University of Zurich, 8006 Zurich, Switzerland
| | - Ahmed Idbaih
- AP-HP, Hôpitaux Universitaires La Pitié Salpêtrière-Charles Foix, Sorbonne Université, 75005 Paris, France
- Inserm, CNRS, UMR S 1127, Institut du Cerveau-Paris Brain Institute, 75013 Paris, France
- ICM, Service de Neurologie 2-Mazarin, 75013 Paris, France
| | - Roland Goldbrunner
- Center for Neurosurgery, Department of General Neurosurgery, University of Cologne, 50923 Cologne, Germany
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Dengler NF, Scholz C, Beck J, Uerschels AK, Sure U, Scheller C, Strauss C, Martin D, Schackert G, Heinen C, Woitzik J, McLean AL, Rosahl SK, Kolbenschlag J, Heinzel J, Schuhmann M, Tatagiba MS, Guerra WKW, Schroeder HWS, Vetrano IG, Ahmadi R, Unterberg A, Reinsch J, Zdunczyk A, Unteroberdoerster M, Vajkoczy P, Wehner S, Becker M, Matthies C, Pérez-Tejón J, Dubuisson A, Barrone DG, Trivedi R, Capone C, Ferraresi S, Kraschl J, Kretschmer T, Dombert T, Staub F, Ronellenfitsch M, Marquardt G, Prinz V, Czabanka M, Carolus A, Braun V, König R, Antoniadis G, Wirtz CR, Rasulic L, Pedro MT. Rationale and design of the peripheral nerve tumor registry: an observational cohort study. Neurol Res 2023; 45:81-85. [PMID: 36208460 DOI: 10.1080/01616412.2022.2129762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
AIM Peripheral nerve tumors (PNT) are rare lesions. To date, no systematic multicenter studies on epidemiology, clinical symptoms, treatment strategies and outcomes, genetic and histopathologic features, as well as imaging characteristics of PNT were published. The main goal of our PNT Registry is the systematic multicenter investigation to improve our understanding of PNT and to assist future interventional studies in establishing hypotheses, determining potential endpoints, and assessing treatment efficacy. METHODS Aims of the PNT registry were set at the 2015 Meeting of the Section of Peripheral Nerve Surgery of the German Society of Neurosurgery. A study protocol was developed by specialists in PNT care. A minimal data set on clinical status, treatment types and outcomes is reported by each participating center at initial contact with the patient and after 1 year, 2 years, and 5 years. Since the study is coordinated by the Charité Berlin, the PNR Registry was approved by the Charité ethics committee (EA4/058/17) and registered with the German Trials Registry (www.drks.de). On a national level, patient inclusion began in June 2016. The registry was rolled out across Europe at the 2019 meeting of the European Association of Neurosurgery in Dublin. RESULTS Patient recruitment has been initiated at 10 centers throughout Europe and 14 additional centers are currently applying for local ethics approval. CONCLUSION To date, the PNT registry has grown into an international study group with regular scientific and clinical exchange awaiting the first results of the retrospective study arm.
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Affiliation(s)
- Nora F Dengler
- Department of Neurosurgery, Charité - Universitaetsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Christoph Scholz
- Department of Neurosurgery, Medical Center, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg i.B, Germany
| | - Jürgen Beck
- Department of Neurosurgery, Medical Center, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg i.B, Germany
| | - Anne-Kathrin Uerschels
- Department of Neurosurgery, University Hospital Essen, University of Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany
| | - Ullrich Sure
- Department of Neurosurgery, University Hospital Essen, University of Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany
| | - Christian Scheller
- Department of Neurosurgery, University of Halle, Ernst-Grube-Str. 40, 06120 Halle, Germany
| | - Christian Strauss
- Department of Neurosurgery, University of Halle, Ernst-Grube-Str. 40, 06120 Halle, Germany
| | - Daniel Martin
- Department of Neurosurgery, Technische Universität Dresden, Fetscherstr. 74, 01307 Dresden, Germany
| | - Gabriele Schackert
- Department of Neurosurgery, Technische Universität Dresden, Fetscherstr. 74, 01307 Dresden, Germany
| | - Christian Heinen
- Department of Neurosurgery, Evangelisches Krankenhaus, Carl von Ossietzky University Oldenburg, Marienstr. 11, 26121 Oldenburg, Germany.,Department of Neurosurgery, PeripheralNerveUnit Nord, Christliches Krankenhaus Quakenbrück GmbH, Quakenbrück, Germany
| | - Johannes Woitzik
- Department of Neurosurgery, Evangelisches Krankenhaus, Carl von Ossietzky University Oldenburg, Marienstr. 11, 26121 Oldenburg, Germany
| | - Anna Lawson McLean
- Department of Neurosurgery, HELIOS Klinikum Erfurt, Nordhäuser Str. 74, 99089 Erfurt, Germany
| | - Steffen K Rosahl
- Department of Neurosurgery, HELIOS Klinikum Erfurt, Nordhäuser Str. 74, 99089 Erfurt, Germany
| | - Jonas Kolbenschlag
- Department of Hand-, Plastic, Reconstructive, and Burn Surgery, BG Klinik Tübingen, Schnarrenbergstraße 95, 72076 Tübingen Germany
| | - Johannes Heinzel
- Department of Hand-, Plastic, Reconstructive, and Burn Surgery, BG Klinik Tübingen, Schnarrenbergstraße 95, 72076 Tübingen Germany
| | - Martin Schuhmann
- Department of Neurosurgery, Universitätsklinikum Tübingen, Hippe-Seyler-Straße 3, 72076 Tübingen Germany
| | - Marco Soares Tatagiba
- Department of Neurosurgery, Universitätsklinikum Tübingen, Hippe-Seyler-Straße 3, 72076 Tübingen Germany
| | | | - Henry W S Schroeder
- Department of Neurosurgery, University Medicine Greifswald, Sauerbruchstr. 1, 17475 Greifswald, Germany
| | - Ignazio Gaspare Vetrano
- Department of Neurosurgery, Fondazione I.R.C.C.S Istituto Neurologico Carlo Besta, Via Giovanni Celoria 11, 20133 Milano, Italy
| | - Rezvan Ahmadi
- Department of Neurosurgery, Heidelberg University Hospital, Berlin, Germany
| | - Andreas Unterberg
- Department of Neurosurgery, Heidelberg University Hospital, Berlin, Germany
| | - Jennifer Reinsch
- Department of Neurosurgery, Charité - Universitaetsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Anna Zdunczyk
- Department of Neurosurgery, Charité - Universitaetsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Meike Unteroberdoerster
- Department of Neurosurgery, Charité - Universitaetsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Peter Vajkoczy
- Department of Neurosurgery, Charité - Universitaetsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Sarah Wehner
- Department of Plastic, Reconstructive, and Hand Surgery, Burn Center, University Hospital RWTH Aachen, Aachen, Germany
| | - Michael Becker
- Department of Plastic, Reconstructive, and Hand Surgery, Burn Center, University Hospital RWTH Aachen, Aachen, Germany
| | - Cordula Matthies
- Department of Neurosurgery, Würzburg University Hospital, Würzburg, Germany
| | - Jose Pérez-Tejón
- Department of Neurosurgery, Würzburg University Hospital, Würzburg, Germany
| | - Annie Dubuisson
- Department of Neurosurgery, CHU Liège, Avenue de L'Hôpital 1, Liège, Belgium
| | - Damiano G Barrone
- Department of Clinical Neurosciences, University of Cambridge School of Clinical Medicine, Cambridge, UK
| | - Rikin Trivedi
- Department of Clinical Neurosciences, University of Cambridge School of Clinical Medicine, Cambridge, UK
| | - Crescenzo Capone
- Division of Neurosurgery, Department of Neurosciences, Reproductive and Odontostomatological Sciences, School of Medicine and Surgery, University Napoli "Frederico II", Naples, Italy
| | - Stefano Ferraresi
- Department of Neurosurgery, Ospedale Santa Maria della Misericordia, Rovigo, Italy
| | - Jakob Kraschl
- Department of Neurosurgery and Neurorestoration, Klinikum Klagenfurt Am Wörthersee, Klagenfurt, Austria
| | - Thomas Kretschmer
- Department of Neurosurgery and Neurorestoration, Klinikum Klagenfurt Am Wörthersee, Klagenfurt, Austria
| | | | - Frank Staub
- Center for Peripheral Neurosurgery, Dossenheim, Germany
| | - Michael Ronellenfitsch
- Dr. Senckenberg Institute of Neurooncology, University Hospital Frankfurt, Goethe University, Schleusenweg, Frankfurt am Main, Germany
| | - Gerhard Marquardt
- Department of Neurosurgery, University Hospital Frankfurt, Goethe University, Siegen, Germany
| | - Vincent Prinz
- Department of Neurosurgery, University Hospital Frankfurt, Goethe University, Siegen, Germany
| | - Marcus Czabanka
- Department of Neurosurgery, University Hospital Frankfurt, Goethe University, Siegen, Germany
| | - Anne Carolus
- Department of Neurosurgery, Diakonie Klinikum Jung-Stilling-Krankenhaus Neurochriurgische Klinik, Siegen, Germany
| | - Veit Braun
- Department of Neurosurgery, Diakonie Klinikum Jung-Stilling-Krankenhaus Neurochriurgische Klinik, Siegen, Germany
| | - Ralph König
- Peripheral Nerve Surgery Unit, Department of Neurosurgery, Ulm University, District Hospital, Günzburg, Germany
| | - Gregor Antoniadis
- Peripheral Nerve Surgery Unit, Department of Neurosurgery, Ulm University, District Hospital, Günzburg, Germany
| | - Christian Rainer Wirtz
- Peripheral Nerve Surgery Unit, Department of Neurosurgery, Ulm University, District Hospital, Günzburg, Germany
| | - Lukas Rasulic
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia; Clinic for Neurosurgery, Clinical Center of Serbia, Belgrade, Serbia
| | - Maria Teresa Pedro
- Peripheral Nerve Surgery Unit, Department of Neurosurgery, Ulm University, District Hospital, Günzburg, Germany
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