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Saway BF, Courtney J, Barley J, Frankel B, Hofstetter C, Kalhorn S. Contrast enhanced ultrasound for traumatic spinal cord injury: an overview of current and future applications. Spinal Cord Ser Cases 2024; 10:31. [PMID: 38664470 PMCID: PMC11045808 DOI: 10.1038/s41394-024-00644-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 04/08/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024] Open
Abstract
STUDY DESIGN Systematic review. OBJECTIVE Contrast-enhanced ultrasound (CEUS) is an imaging modality that has only recently seen neurosurgical application. CEUS uses inert microbubbles to intraoperatively visualize vasculature and perfusion of the brain and spinal cord in real time. Observation and augmentation of spinal cord perfusion is vital component of the management of traumatic spinal cord injury, yet there are limited imaging modalities to evaluate spinal cord perfusion. CEUS provides an intraoperative imaging tool to evaluate spinal cord perfusion in real time. The objective of this review is to evaluate the current literature on the various applications and benefits of CEUS in traumatic spinal cord injury. SETTING South Carolina, USA. METHODS This review was written according to the PRISMA 2020 guidelines. RESULTS 143 articles were found in our literature search, with 46 of them being unique. After excluding articles for relevance to CEUS and spinal cord injury, we were left with 10 papers. Studies in animal models have shown CEUS to be an effective non-invasive imaging modality that can detect perfusion changes of injured spinal cords in real time. CONCLUSION This imaging modality can provide object perfusion data of the nidus of injury, surrounding penumbra and healthy neural tissue in a traumatized spinal cord. Investigation in its use in humans is ongoing and remains promising to be an effective diagnostic and prognostic tool for those suffering from spinal cord injury.
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Affiliation(s)
- Brian Fabian Saway
- Medical University of South Carolina, Department of Neurosurgery, Charleston, SC, 29425, USA.
| | - James Courtney
- Florida State University College of Medicine, Tallahassee, FL, 32303, USA
| | - Jessica Barley
- Medical University of South Carolina, Department of Neurosurgery, Charleston, SC, 29425, USA
| | - Bruce Frankel
- Southern Illinois University School of Medicine, Department of Neurosurgery, Springfield, IL, 62702, USA
| | | | - Stephen Kalhorn
- Medical University of South Carolina, Department of Neurosurgery, Charleston, SC, 29425, USA
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Shimony N, Fehnel K, Abbott IR, Jallo GI. The evolution of spinal cord surgery: history, people, instruments, and results. Childs Nerv Syst 2023; 39:2687-2700. [PMID: 37658937 DOI: 10.1007/s00381-023-06128-3] [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: 08/01/2023] [Accepted: 08/12/2023] [Indexed: 09/05/2023]
Abstract
INTRODUCTION Spinal cord surgery has and always will be a challenging operation with satisfying results, but also with potentially devastating results. Over the last century, there has been an evolution in the way we perceive and conduct spinal cord surgery. The phenomenal evolution in technology from the very first x-ray pictures helps to localize the spinal pathology through the use of high-resolution MRI and ultrasonography that allows for high precision surgery with relatively minimal exposure. METHODS The advancements in the surgical technique and the utilization of neuromonitoring allow for maximal safe resection of these delicate and intricate tumors. We also are beginning to understand the biology of spinal cord tumors and vascular lesions, as in the recent 2021 WHO classification which identifies specific entities such as spinal ependymomas, MYCN-amplified, as separate entity from the other subtypes of ependymomas. Surgeons have also accepted the importance of maximal safe resection for most of the spinal cord pathologies rather than just performing biopsy and adjuvant treatment. CONCLUSION There have been significant advances since the first resection of an intramedullary tumor including diagnosis, imaging, and surgical technique for children. These advances have improved the prognosis and outcome in these children.
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Affiliation(s)
- Nir Shimony
- Department of Surgery, St. Jude Children's Research Hospital, Memphis, TN, USA
- Le Bonheur Neuroscience Institute, Le Bonheur Children's Hospital, Memphis, TN, USA
- Department of Neurological Surgery, University of Tennessee Health Science Center, Memphis, TN, USA
- Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA
- Semmes-Murphey Clinic, Memphis, TN, USA
| | - Katie Fehnel
- Department of Neurological Surgery, Harvard Medical School, Boston, MA, USA
- Department of Neurological Surgery, Dana Farber Institute, Boston Children's Hospital, Boston, MA, USA
| | - I Rick Abbott
- Division of Pediatric Neurosurgery, Albert Einstein College of Medicine, New York, NY, USA
| | - George I Jallo
- Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA.
- Institute for Brain Protection Sciences, Johns Hopkins All Children's Hospital, 600 5Th Street South, St Petersburg, FL, 33701, USA.
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Soloukey S, Verhoef L, Generowicz BS, De Zeeuw CI, Koekkoek SKE, Vincent AJPE, Dirven CMF, Harhangi BS, Kruizinga P. Case report: High-resolution, intra-operative µDoppler-imaging of spinal cord hemangioblastoma. Front Surg 2023; 10:1153605. [PMID: 37342792 PMCID: PMC10277559 DOI: 10.3389/fsurg.2023.1153605] [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: 01/29/2023] [Accepted: 05/19/2023] [Indexed: 06/23/2023] Open
Abstract
Surgical resection of spinal cord hemangioblastomas remains a challenging endeavor: the neurosurgeon's aim to reach total tumor resections directly endangers their aim to minimize post-operative neurological deficits. The currently available tools to guide the neurosurgeon's intra-operative decision-making consist mostly of pre-operative imaging techniques such as MRI or MRA, which cannot cater to intra-operative changes in field of view. For a while now, spinal cord surgeons have adopted ultrasound and its submodalities such as Doppler and CEUS as intra-operative techniques, given their many benefits such as real-time feedback, mobility and ease of use. However, for highly vascularized lesions such as hemangioblastomas, which contain up to capillary-level microvasculature, having access to higher-resolution intra-operative vascular imaging could potentially be highly beneficial. µDoppler-imaging is a new imaging modality especially fit for high-resolution hemodynamic imaging. Over the last decade, µDoppler-imaging has emerged as a high-resolution, contrast-free sonography-based technique which relies on High-Frame-Rate (HFR)-ultrasound and subsequent Doppler processing. In contrast to conventional millimeter-scale (Doppler) ultrasound, the µDoppler technique has a higher sensitivity to detect slow flow in the entire field-of-view which allows for unprecedented visualization of blood flow down to sub-millimeter resolution. In contrast to CEUS, µDoppler is able to image high-resolution details continuously, without being contrast bolus-dependent. Previously, our team has demonstrated the use of this technique in the context of functional brain mapping during awake brain tumor resections and surgical resections of cerebral arteriovenous malformations (AVM). However, the application of µDoppler-imaging in the context of the spinal cord has remained restricted to a handful of mostly pre-clinical animal studies. Here we describe the first application of µDoppler-imaging in the case of a patient with two thoracic spinal hemangioblastomas. We demonstrate how µDoppler is able to identify intra-operatively and with high-resolution, hemodynamic features of the lesion. In contrast to pre-operative MRA, µDoppler could identify intralesional vascular details, in real-time during the surgical procedure. Additionally, we show highly detailed post-resection images of physiological human spinal cord anatomy. Finally, we discuss the necessary future steps to push µDoppler to reach actual clinical maturity.
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Affiliation(s)
- Sadaf Soloukey
- Department of Neuroscience, Erasmus MC, Rotterdam, Netherlands
- Department of Neurosurgery, Erasmus MC, Rotterdam, Netherlands
| | - Luuk Verhoef
- Department of Neuroscience, Erasmus MC, Rotterdam, Netherlands
| | | | - Chris I. De Zeeuw
- Department of Neuroscience, Erasmus MC, Rotterdam, Netherlands
- Royal Dutch Academy for Arts and Sciences, Netherlands Institute for Neuroscience, Amsterdam, Netherlands
| | | | | | | | - Biswadjiet S. Harhangi
- Department of Neurosurgery, Erasmus MC, Rotterdam, Netherlands
- Department of Neurosurgery, Park MC, Rotterdam, Netherlands
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Han B, Zhang L, Jia W. Contrast-Enhanced Ultrasound in Resection of Spinal Cord Gliomas. World Neurosurg 2023; 171:e83-e92. [PMID: 36427693 DOI: 10.1016/j.wneu.2022.11.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/18/2022] [Accepted: 11/19/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND Intraoperative contrast-enhanced ultrasound (iCEUS) is a relatively new technique for visualizing brain gliomas and can help achieve maximum resection, but its potential in evaluation of spinal cord gliomas has not been well defined. The aim of this study was to describe the iCEUS characterization of and evaluate its role in visualizing intramedullary gliomas. METHODS A retrospective review of patients who underwent intramedullary glioma resection with iCEUS guidance from 2019 to 2021 was conducted. An offline analysis was performed to compare and characterize the perfusion features of each glioma. RESULTS This study included 36 patients who underwent iCEUS for spinal cord gliomas. iCEUS was performed successfully, and all gliomas were clearly identified. The distribution of contrast agent showed different dynamic phases (arterial, peak, and washout) from those observed in brain gliomas, generally appearing slower and less intense in spinal cord gliomas. iCEUS helped highlight intramedullary gliomas, each of which demonstrated specific iCEUS features depending on the grade. Gross total resection was achieved in 20 patients (55.6%), subtotal resection was achieved in 11 patients (30.6%), and partial resection was achieved in 5 patients (13.8%). CONCLUSIONS ICEUS adds valuable information in highlighting spinal cord gliomas in real time. It allows the neurosurgeon to assess the anatomical location of the glioma and delineate the tumor margins. iCEUS could play a potentially important role in guiding spinal cord glioma resection. Further study with more cases is needed to better understand the microbubble distribution dynamics in intramedullary gliomas.
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Affiliation(s)
- Bo Han
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Liang Zhang
- National Cancer Center/National Clinical Research Center for Cancer/Hebei Cancer Hospital, Chinese Academy of Medical Sciences, Langfang, China; National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Wenqing Jia
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
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Hersh AM, Patel J, Pennington Z, Porras JL, Goldsborough E, Antar A, Elsamadicy AA, Lubelski D, Wolinsky JP, Jallo G, Gokaslan ZL, Lo SFL, Sciubba DM. Perioperative outcomes and survival after surgery for intramedullary spinal cord tumors: a single-institution series of 302 patients. J Neurosurg Spine 2022; 37:252-262. [PMID: 35213831 DOI: 10.3171/2022.1.spine211235] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 01/03/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Intramedullary spinal cord tumors (IMSCTs) are rare neoplasms whose treatment is often technically challenging. Given the low volume seen at most centers, perioperative outcomes have been reported infrequently. Here, the authors present the largest single-institution series of IMSCTs, focusing on the clinical presentation, histological makeup, perioperative outcomes, and long-term survival of surgically treated patients. METHODS A cohort of patients operated on for primary IMSCTs at a comprehensive cancer center between June 2002 and May 2020 was retrospectively identified. Data on patient demographics, tumor histology, neuraxial location, baseline neurological status, functional deficits, and operative characteristics were collected. Perioperative outcomes of interest included length of stay, postoperative complications, readmission, reoperation, and discharge disposition. Data were compared across tumor histologies using the Kruskal-Wallis H test, chi-square test, and Fisher exact test. Pairwise comparisons were conducted using Tukey's honest significant difference test, chi-square test, and Fisher exact test. Long-term survival was assessed across tumor categories and histological subtype using the log-rank test. RESULTS Three hundred two patients were included in the study (mean age 34.9 ± 19 years, 77% white, 57% male). The most common tumors were ependymomas (47%), astrocytomas (31%), and hemangioblastomas (11%). Ependymomas and hemangioblastomas disproportionately localized to the cervical cord (54% and 59%, respectively), whereas astrocytomas were distributed almost equally between the cervical cord (36%) and thoracic cord (38%). Clinical presentation, extent of functional dependence, and postoperative 30-day outcomes were largely independent of underlying tumor pathology, although tumors of the thoracic cord had worse American Spinal Injury Association (ASIA) grades than cervical tumors. Rates of gross-total resection were lower for astrocytomas than for ependymomas (54% vs 84%, p < 0.01) and hemangioblastomas (54% vs 100%, p < 0.01). Additionally, 30-day readmission rates were significantly higher for astrocytomas than ependymomas (14% vs 6%, p = 0.02). Overall survival was significantly affected by the underlying pathology, with astrocytomas having poorer associated prognoses (40% at 15 years) than ependymomas (81%) and hemangioblastomas (66%; p < 0.01) and patients with high-grade ependymomas and astrocytomas having poorer long-term survival than those with low-grade lesions (p < 0.01). CONCLUSIONS The neuraxial location of IMSCTs, extent of resection, and postoperative survival differed significantly across tumor pathologies. However, perioperative outcomes did not vary significantly across tumor cohorts, suggesting that operative details, rather than pathology, may have a stronger influence on the short-term clinical course, whereas pathology appears to have a stronger impact on long-term survival.
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Affiliation(s)
- Andrew M Hersh
- 1Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Jaimin Patel
- 1Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Zach Pennington
- 2Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota
| | - Jose L Porras
- 1Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Earl Goldsborough
- 1Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Albert Antar
- 1Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | | | - Daniel Lubelski
- 1Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Jean-Paul Wolinsky
- 4Department of Neurological Surgery, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
| | - George Jallo
- 5Department of Neurosurgery, Johns Hopkins Medicine, Institute for Brain Protection Sciences, Johns Hopkins All Children's Hospital, St. Petersburg, Florida
| | - Ziya L Gokaslan
- 6Department of Neurosurgery, Brown University, Providence, Rhode Island; and
| | - Sheng-Fu Larry Lo
- 7Department of Neurosurgery, Donald and Barbara Zucker School of Medicine at Hofstra, Long Island Jewish Medical Center and North Shore University Hospital, Northwell Health, Manhasset, New York
| | - Daniel M Sciubba
- 1Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
- 7Department of Neurosurgery, Donald and Barbara Zucker School of Medicine at Hofstra, Long Island Jewish Medical Center and North Shore University Hospital, Northwell Health, Manhasset, New York
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6
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Intraoperative ultrasonography in laminectomy for degenerative cervical spondylotic myelopathy: a clinical and radiological evaluation. Acta Neurochir (Wien) 2022; 164:1873-1881. [PMID: 35536511 PMCID: PMC9233640 DOI: 10.1007/s00701-022-05232-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 04/22/2022] [Indexed: 11/28/2022]
Abstract
Background The incidence of cervical myelopathy due to spinal stenosis is constantly growing in an aging population. Especially in multisegmental disease, dorsal laminectomy is the intervention of choice. Intraoperative imaging with ultrasound might provide additional information about extent and sufficiency of spinal cord decompression. Methods In this prospective study, the width of the subarachnoid space was systematically measured by intraoperative ultrasound at predefined sites at the cranial and caudal edge of decompression in axial and sagittal reconstruction. These data were compared with corresponding sites on postoperative T2-weighted MRI imaging. In addition, the functional outcome was assessed by modified Japanese Orthopaedic Association (mJOA) score. A historical patient cohort treated without ultrasound-guided laminectomy served as control group. Results Altogether, 29 patients were included. According to mJOA score at last follow-up, 7/29 patients reported stable symptoms and 21/29 patients showed a substantial benefit with no or minor residual neurological deficits. One patient suffered from a new C5 palsy. Intraoperative ultrasound-guided posterior decompression provided excellent overview in all cases. Measurement of the width of the subarachnoid space acquired by intraoperative ultrasound and postoperative MRI images showed a very high correlation, especially at the cranial level (p < 0.001, r = 0.880). Bland–Altman analysis showed that most patients were within the 1.96 × SD limits of agreement throughout all measurements. No ultrasound procedure-related complications were observed. Compared to a historical cohort of 27 patients, no significant differences were found regarding functional outcome (p = 0.711). Conclusion Intraoperative sonography visualises the surgically achieved restoration of the subarachnoid space in good correlation with postoperative MRI and might serve as a fast, precise and reliable tool for intraoperative imaging in cervical laminectomy. However, we could not demonstrate a clinical benefit with regard to functional outcome.
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Patel MR, Jacob KC, Parsons AW, Chavez FA, Ribot MA, Munim MA, Vanjani NN, Pawlowski H, Prabhu MC, Singh K. Systematic Review: Applications of Intraoperative Ultrasound in Spinal Surgery. World Neurosurg 2022; 164:e45-e58. [PMID: 35259500 DOI: 10.1016/j.wneu.2022.02.130] [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: 01/05/2022] [Accepted: 02/28/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND Due to increased practicality and decreased costs and radiation, interest has risen for intraoperative ultrasound (iUS) in spinal surgery applications; however, few studies have provided a robust overview of its use in spinal surgery. We synthesize findings of existing literature on usage of iUS in navigation, pedicle screw placement, and identification of anatomy during spinal interventions. METHODS Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were utilized in this systematic review. Studies were identified through PubMed, Scopus, and Google Scholar databases using the search string. Abstracts mentioning iUS in spine applications were included. Upon full-text review, exclusion criteria were implemented, including outdated studies or those with weak topic relevance or statistical power. Upon elimination of duplicates, multi-reviewer screening for eligibility, and citation search, 44 manuscripts were analyzed. RESULTS Navigation using iUS is safe, effective, and economical. iUS registration accuracy and success is within clinically acceptable limits for image-guided navigation (Table 2). Pedicle screw instrumentation with iUS is precise with a favorable safety profile (Table 2). Anatomical landmarks are reliably identified with iUS, and surgeons are overwhelmingly successful in neural or vascular tissue identification with iUS modalities including standard B mode, doppler, and contrast-enhanced ultrasound (CE-US) (Table 3). iUS use in traumatic reduction of fractures properly identifies anatomical structures, intervertebral disc space, and vasculature (Table 3). CONCLUSION iUS eliminates radiation, decreases costs, and provides sufficient accuracy and reliability in identification of anatomical and neurovascular structures in various spinal surgery settings.
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Affiliation(s)
- Madhav R Patel
- Department of Orthopaedic Surgery, Rush University Medical Center, 1611 W. Harrison St. Suite #300, Chicago, IL, 60612
| | - Kevin C Jacob
- Department of Orthopaedic Surgery, Rush University Medical Center, 1611 W. Harrison St. Suite #300, Chicago, IL, 60612
| | - Alexander W Parsons
- Department of Orthopaedic Surgery, Rush University Medical Center, 1611 W. Harrison St. Suite #300, Chicago, IL, 60612
| | - Frank A Chavez
- Department of Orthopaedic Surgery, Rush University Medical Center, 1611 W. Harrison St. Suite #300, Chicago, IL, 60612
| | - Max A Ribot
- Department of Orthopaedic Surgery, Rush University Medical Center, 1611 W. Harrison St. Suite #300, Chicago, IL, 60612
| | - Mohammed A Munim
- Department of Orthopaedic Surgery, Rush University Medical Center, 1611 W. Harrison St. Suite #300, Chicago, IL, 60612
| | - Nisheka N Vanjani
- Department of Orthopaedic Surgery, Rush University Medical Center, 1611 W. Harrison St. Suite #300, Chicago, IL, 60612
| | - Hanna Pawlowski
- Department of Orthopaedic Surgery, Rush University Medical Center, 1611 W. Harrison St. Suite #300, Chicago, IL, 60612
| | - Michael C Prabhu
- Department of Orthopaedic Surgery, Rush University Medical Center, 1611 W. Harrison St. Suite #300, Chicago, IL, 60612
| | - Kern Singh
- Department of Orthopaedic Surgery, Rush University Medical Center, 1611 W. Harrison St. Suite #300, Chicago, IL, 60612.
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Vetrano IG, Gennari AG, Erbetta A, Acerbi F, Nazzi V, DiMeco F, Prada F. Contrast-Enhanced Ultrasound Assisted Surgery of Intramedullary Spinal Cord Tumors: Analysis of Technical Benefits and Intra-operative Microbubble Distribution Characteristics. ULTRASOUND IN MEDICINE & BIOLOGY 2021; 47:398-407. [PMID: 33349517 DOI: 10.1016/j.ultrasmedbio.2020.10.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 10/22/2020] [Accepted: 10/27/2020] [Indexed: 06/12/2023]
Abstract
Intra-operative contrast-enhanced ultrasound (CEUS) is a relatively standardized procedure in brain neurosurgery, but it is still underused in spinal cord and intramedullary tumor evaluation. We reviewed and analyzed the intra-operative data from a surgical series of patients harboring intramedullary spinal cord tumors who underwent surgery under CEUS guidance. CEUS was performed in 12 patients (age range: 13-55 y); all lesions had ill-defined boundaries or peritumoral cysts at preliminary intra-operative B-mode ultrasound. CEUS highlighted the tumors in all cases. The contrast agent's spinal distribution revealed different phases (arterial, peak, washout), as observed in the brain, but these appeared to be slower and less intense. In our experience, intra-operative CEUS allows surgeons to assess spinal cord perfusion and highlight intramedullary tumors in real time. As for other imaging modalities, ultrasound contrast agents add valuable information over baseline imaging, and their use should be fostered to better understand microbubble distribution dynamics.
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Affiliation(s)
- Ignazio G Vetrano
- Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Antonio G Gennari
- Department of Radiology, Cattinara Hospital, University of Trieste, Trieste, Italy; Department of Neuroradiology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Alessandra Erbetta
- Department of Neuroradiology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Francesco Acerbi
- Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Vittoria Nazzi
- Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Francesco DiMeco
- Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy; Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy; Department of Neurological Surgery, Johns Hopkins University, Baltimore, Maryland, USA
| | - Francesco Prada
- Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy; Department of Neurological Surgery, University of Virginia Health Science Center, Charlottesville, Virginia, USA; Focused Ultrasound Foundation, Charlottesville, Virginia, USA.
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Barkley A, McGrath LB, Hofstetter CP. Intraoperative contrast-enhanced ultrasound for intramedullary spinal neoplasms: patient series. JOURNAL OF NEUROSURGERY. CASE LESSONS 2021; 1:CASE2083. [PMID: 36046770 PMCID: PMC9394227 DOI: 10.3171/case2083] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 10/30/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND Primary intramedullary spinal tumors cause significant morbidity and death.
Intraoperative ultrasound as an adjunct for localization and monitoring the
extent of resection has not been systematically evaluated in these patients;
the effectiveness of intraoperative contrast-enhanced ultrasound (CEUS)
remains almost completely unexplored. OBSERVATIONS A retrospective case series of patients at a single institution who had
consented to the off-label use of intraoperative CEUS was identified. Seven
patients with a mean age of 52.8 ± 15.8 years underwent resection of
intramedullary tumors assisted by CEUS performed by a single attending
neurosurgeon. Histopathological evaluation revealed 3 cases of
hemangioblastoma, 1 case of pilocytic astrocytoma, 2 cases of ependymoma,
and 1 case of subependymoma. Contrast enhancement correlated with gadolinium
enhancement on preoperative magnetic resonance imaging. Intraoperative CEUS
facilitated precise lesion localization and myelotomy planning. Dynamic CEUS
studies were useful in demonstrating the blood supply to lesions with a
dominant vascular pedicle. Regardless of contrast uptake, the differential
enhancement between spinal cord tissue and neoplasm assisted in determining
interface boundaries. LESSONS Intraoperative CEUS constitutes a useful adjunct for the intraoperative
delineation of contrast-enhancing intramedullary tumors and in vivo
confirmation of gross-total resection. Systematic investigation is needed to
establish the role of CEUS for resection of intramedullary spinal tumors of
various pathologies.
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Affiliation(s)
- Ariana Barkley
- Department of Neurological Surgery, University of Washington, Seattle, Washington
| | - Lynn B McGrath
- Department of Neurological Surgery, University of Washington, Seattle, Washington
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