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Mesfin A, Botros M, Benn L, Kulp A. Risk Factors for Surgical Site Infections and the Effects of Betadine Irrigation and Intrawound Vancomycin Powder on Infection Rates in Spine Tumor Surgery. Cureus 2024; 16:e64591. [PMID: 39144892 PMCID: PMC11324008 DOI: 10.7759/cureus.64591] [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] [Accepted: 07/11/2024] [Indexed: 08/16/2024] Open
Abstract
Background Surgical site infection (SSI) following spine tumor surgery results in delays in radiation therapy and the initiation of systemic treatment. The study aims to assess risk factors for SSI in malignancy-related spinal infections and rates of infection observed in a single center with the use of betadine irrigation (BI) and intrawound vancomycin powder (IVP). Methods Spine tumor patients managed from 11/2012 to 11/2023 were identified using a surgical database (JotLogs, Efficient Surgical Apps, Portland, Maine). Inclusion criteria were patients receiving BI and IVP and alive at 30 days post-op. Exclusion criteria were patients not receiving a combination of BI and IVP due to allergies and mortality within 30 days of surgery. Patient demographics, histology, history of pre-operative and post-operative radiation treatment history, tumor location, procedure type, number of procedures per patient, SSI, wound culture results, and mortality were collected. Results One hundred two patients undergoing 130 procedures had an SSI rate of 3.85% (5/130). There were 18.6% primary and 81.4% metastatic tumors. Demographics were average age 59.5 years old (range 7-92), 60.8% male, 39.2% female, White 88.2%, Black 9.8%, and others 2%. Pre-operative radiation therapy was significantly associated with the risk of SSI (p=0.005). Percutaneous instrumentation did not lead to a significant difference in infection rates (p=0.139). There was no significant difference in infection rates between primary and metastatic tumors (p=0.58). Multivariable regression analysis revealed pre-operative radiation (OR: 18.1; 95%CI: 1.9-172.7; p=0.009) as the statistically significant independent risk factor. Conclusions Pre-operative radiation therapy remains a risk factor for SSI. However, percutaneous instrumentation did not lead to SSI, and there was no significant difference in infection rates between primary and metastatic tumors. SSI rate was 3.85% in patients who had a combination of BI and IVP in spine tumor surgery.
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Affiliation(s)
- Addisu Mesfin
- Department of Orthopedics Surgery, MedStar Washington Hospital Center, Washington, USA
| | - Mina Botros
- Department of Orthopedics & Physical Performance, University of Rochester Medical Center, Rochester, USA
| | - Lancelot Benn
- Department of Orthopedics Surgery, MedStar Washington Hospital Center, Washington, USA
| | - Andrea Kulp
- Department of Orthopedics & Physical Performance, University of Rochester Medical Center, Rochester, USA
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2
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Saha P, Cady-McCrea C, Puvanesarajah V, Mesfin A. Patient-Reported Outcomes for Spine Oncology: A Narrative Review. World Neurosurg 2024; 185:165-170. [PMID: 38364898 DOI: 10.1016/j.wneu.2024.02.042] [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: 08/07/2023] [Accepted: 02/07/2024] [Indexed: 02/18/2024]
Abstract
Spine tumors, both primary and metastatic, impose significant morbidity and mortality on patients and physicians. Patient-reported outcomes are valuable tools to assess a patient's impression of their health status and enhance communication between physicians and patients. Various spine generic patient-reported outcome tools have traditionally been used but have not been validated in the spine tumor patient population. The Spine Oncology Study Group Outcome Questionnaire, which is disease-specific for the metastatic spine patient population, has been shown to have strong validity, even across multiple languages. Patient-Reported Outcomes Measurement Information System, which has recently been developed, employs computerized adaptive testing to assess multiple health domains. It has been shown to capture information in both generic and specific questionnaires and has the potential to be used as a universal tool in the spine oncology patient population. Further long-term studies, as well as, cross-cultural adaptations, are needed to validate Patient-Reported Outcomes Measurement Information System's applicability and effectiveness.
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Affiliation(s)
| | - Clarke Cady-McCrea
- Department of Orthopedic Surgery and Physical Performance, School of Medicine & Dentistry, University of Rochester, Rochester, New York, USA
| | - Varun Puvanesarajah
- Medstar Orthopaedic Institute, Georgetown University School of Medicine, Washington, District of Columbia, USA
| | - Addisu Mesfin
- Medstar Orthopaedic Institute, Georgetown University School of Medicine, Washington, District of Columbia, USA
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3
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González-Kusjanovic N, Delgado Ochoa B, Vidal C, Campos M. Post-operative complications affect survival in surgically treated metastatic spinal cord compression. INTERNATIONAL ORTHOPAEDICS 2024; 48:1341-1350. [PMID: 38472466 DOI: 10.1007/s00264-024-06120-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 01/13/2024] [Indexed: 03/14/2024]
Abstract
PURPOSE The prevalence of metastatic epidural spinal cord compression (MESCC) is increasing globally due to advancements in cancer diagnosis and treatment. Whilst surgery can benefit specific patients, the complication rate can reach up to 34%, with limited reporting on their impact in the literature. This study aims to analyse the influence of major complications on the survival of surgically treated MESCC patients. METHODS Consecutive MESCC patients undergoing surgery and meeting inclusion criteria were selected. Survival duration from decompressive surgery to death was recorded. Perioperative factors influencing survival were documented and analysed. Kaplan-Meier survival analysis at one year compared these factors. Univariate and multivariate Cox proportional hazard regression analyses were performed. Additionally, univariate analysis compared complicated and uncomplicated groups. RESULTS Seventy-five patients were analysed. Median survival for this cohort was 229 days (95% CI 174-365). Surgical complications, low patient performance, and rapid primary tumour growth were significant perioperative variables for survival in multivariate analyses (p < 0.001, p = 0.003, and p = 0.02, respectively) with a hazard ratio of 3.2, 3.6, and 2.1, respectively. Univariate analysis showed no variables associated with complication occurrence. CONCLUSION In this cohort, major surgical complications, patient performance, and primary tumour growth rate were found to be independent factors affecting one year survival. Thus, prioritizing complication prevention and appropriate patient selection is crucial for optimizing survival in this population.
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Affiliation(s)
- Nicolás González-Kusjanovic
- Orthopaedic Surgery Department, School of Medicine, Pontificia Universidad Católica de Chile, Diagonal Paraguay, 362, Santiago, Chile
| | - Byron Delgado Ochoa
- Orthopaedic Surgery Department, School of Medicine, Pontificia Universidad Católica de Chile, Diagonal Paraguay, 362, Santiago, Chile
| | - Catalina Vidal
- Orthopaedic Surgery Department, School of Medicine, Pontificia Universidad Católica de Chile, Diagonal Paraguay, 362, Santiago, Chile
| | - Mauricio Campos
- Orthopaedic Surgery Department, School of Medicine, Pontificia Universidad Católica de Chile, Diagonal Paraguay, 362, Santiago, Chile.
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Guo CR, Rivera Perla KM, Leary OP, Sastry RA, Borrelli MR, Liu DD, Khunte M, Gokaslan ZL, Liu PY, Kwan D, Fridley JS, Woo AS. Systematic Review of Prophylactic Plastic Surgery Closure to Prevent Postoperative Wound Complications Following Spine Surgery. World Neurosurg 2024; 184:103-111. [PMID: 38185457 DOI: 10.1016/j.wneu.2024.01.007] [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: 08/07/2023] [Revised: 01/01/2024] [Accepted: 01/02/2024] [Indexed: 01/09/2024]
Abstract
Spinal surgeries are increasingly performed in the United States, but complication rates can be unacceptably high at up to 26%. Consequently, plastic surgeons (PS) are sometimes recruited by spine surgeons (SS) for intraoperative assistance with soft tissue closures. An electronic multidatabase literature search was systematically conducted to determine whether spinal wound closure performed by PS minimizes postoperative wound healing complications when compared to closure by SS (neurosurgical or orthopedic), with the hypothesis that closures by PS minimizes incidence of complications. All published studies involving patients who underwent posterior spinal surgery with closure by PS or SS at index spine surgery were identified. Filtering by exclusion criteria identified 10 studies, 4 of which were comparative in nature and included both closures by PS and SS. Of these 4, none reported significant differences in postoperative outcomes between the groups. Across all studies, PS were involved in cases with higher baseline risk for wound complications and greater comorbidity burden. Closures by PS were significantly more likely to have had prior chemotherapy in 2 of the 4 (50%) studies (P = 0.014, P < 0.001) and radiation in 3 of the 4 (75%) studies (P < 0.001, P < 0.01, P < 0.001). In conclusion, closures by PS are frequently performed in higher risk cases, and use of PS in these closures may normalize the risk of wound complications to that of the normal risk cohort, though the overall level of evidence of the published literature is low.
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Affiliation(s)
- Cynthia R Guo
- Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA; Department of Plastic and Reconstructive Surgery, Rhode Island Hospital, Providence, Rhode Island, USA.
| | - Krissia M Rivera Perla
- Department of Plastic and Reconstructive Surgery, The Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Owen P Leary
- Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA; Department of Neurosurgery, Rhode Island Hospital, Providence, Rhode Island, USA
| | - Rahul A Sastry
- Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA; Department of Neurosurgery, Rhode Island Hospital, Providence, Rhode Island, USA
| | - Mimi R Borrelli
- Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA; Department of Plastic and Reconstructive Surgery, Rhode Island Hospital, Providence, Rhode Island, USA
| | - David D Liu
- Department of Neurosurgery, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Mihir Khunte
- Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA
| | - Ziya L Gokaslan
- Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA; Department of Neurosurgery, Rhode Island Hospital, Providence, Rhode Island, USA
| | - Paul Y Liu
- Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA; Department of Plastic and Reconstructive Surgery, Rhode Island Hospital, Providence, Rhode Island, USA
| | - Daniel Kwan
- Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA; Department of Plastic and Reconstructive Surgery, Rhode Island Hospital, Providence, Rhode Island, USA
| | - Jared S Fridley
- Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA; Department of Neurosurgery, Rhode Island Hospital, Providence, Rhode Island, USA
| | - Albert S Woo
- Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA; Department of Plastic and Reconstructive Surgery, Rhode Island Hospital, Providence, Rhode Island, USA
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Piña D, Kalistratova V, Boozé Z, Voort WV, Conry K, Fine J, Holland J, Wick J, Ortega B, Javidan Y, Roberto R, Klineberg E, Lipa S, Le H. Sociodemographic Characteristics of Patients Undergoing Surgery for Metastatic Disease of the Spine. J Am Acad Orthop Surg 2023; 31:e675-e684. [PMID: 37311424 DOI: 10.5435/jaaos-d-22-01147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 04/11/2023] [Indexed: 06/15/2023] Open
Abstract
INTRODUCTION Some patients, particularly those who are socioeconomically deprived, are diagnosed with primary and/or metastatic cancer only after presenting to the emergency department. Our objective was to determine sociodemographic characteristics of patients undergoing surgery for metastatic spine disease at our institution. METHODS This retrospective case series included patients 18 years and older who presented to the emergency department with metastatic spine disease requiring surgery. Demographics and survival data were collected. Sociodemographic characteristics were estimated using the Social Deprivation Index (SDI) and Area Deprivation Index (ADI) for the state of California. Univariate log-rank tests and Kaplan-Meier curves were used to assess differences in survival for predictors of interest. RESULTS Between 2015 and 2021, 64 patients underwent surgery for metastatic disease of the spine. The mean age was 61.0 ± 12.5 years, with 60.9% being male (n = 39). In this cohort, 89.1% of patients were non-Hispanic (n = 57), 71.9% were White (n = 46), and 62.5% were insured by Medicare/Medicaid (n = 40). The mean SDI and ADI were 61.5 ± 28.0 and 7.7 ± 2.2, respectively. 28.1% of patients (n = 18) were diagnosed with primary cancer for the first time while 39.1% of patients (n = 25) were diagnosed with metastatic cancer for the first time. During index hospitalization, 37.5% of patients (n = 24) received palliative care consult. The 3-month, 6-month, and all-time mortality rates were 26.7% (n = 17), 39.5% (n = 23), and 50% (n = 32), respectively, with 10.9% of patients (n = 7) dying during their admission. Payor plan was significant at 3 months ( P = 0.02), and palliative consultation was significant at 3 months ( P = 0.007) and 6 months ( P = 0.03). No notable association was observed with SDI and ADI in quantiles or as continuous variables. DISCUSSION In this study, 28.1% of patients were diagnosed with cancer for the first time. Three-month and 6-month mortality rates for patients undergoing surgery were 26.7% and 39.5%, respectively. Furthermore, mortality was markedly associated with palliative care consultation and insurance status, but not with SDI and ADI. LEVEL OF EVIDENCE Retrospective case series, Level III evidence.
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Affiliation(s)
- Dagoberto Piña
- From the University of California, Davis School of Medicine, Sacramento, CA (Piña, Kalistratova, and Boozé), University of Louisville, School of Medicine, Louisville, KY (Holland), Department of Orthopaedic Surgery, UC Davis Medical Center, Sacramento, CA (Piña, Voort, Conry, Wick, Ortega, Javidan, Roberto, Klineberg, and Le), Department of Public Health Sciences, University of California, Davis, Sacramento, CA (Fine), Department of Orthopaedic Surgery, Brigham and Women's Hospital, Boston, MA (Lipa)
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6
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Riasa INP, Kawilarang B. The Use of Free Vascularized Fibula Graft in Spinal Reconstruction: A Comprehensive Systematic Review. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2023; 11:e5079. [PMID: 37334392 PMCID: PMC10270507 DOI: 10.1097/gox.0000000000005079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 05/02/2023] [Indexed: 06/20/2023]
Abstract
Reconstructive surgeons frequently face large structural abnormalities after spine resection. Unlike defects in the mandible or long bone, where a free vascularized fibular graft (FVFG) is a popular alternative for segmental osseous reconstruction, data on the use of an FVFG in the spine are still limited. The purpose of this study was to comprehensively describe and analyze the outcome of spinal reconstruction utilizing FVFG. Methods The extensive search included the following databases: PubMed, ScienceDirect, Web of Science, Cumulative Index to Nursing and Allied Health Literature, and Cochrane for relevant studies published up to January 20, 2023, according to PRISMA 2020 guidelines. Demographic data, flap success, recipient vessels, and flap-related complications were evaluated. Results We identified 25 eligible studies involving 150 patients, consisting of 82 men and 68 women. Spinal reconstruction utilizing FVFG is mostly reported in the case of spinal neoplasm, followed by spinal infection (osteomyelitis and spinal tuberculosis) and spinal deformities. The cervical spine is the most common vertebral defect reported in the studies. All studies summarized in the present study reported successful spinal reconstruction, while wound infection was the most reported postoperative complication after spinal reconstruction utilizing FVFG. Conclusions The results of the current study highlight the ability and superiority of using FVFG in spinal reconstruction. Despite being technically challenging, this strategy provides enormous benefits to patients. However, a further additional large-scale study is required to corroborate these findings.
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Affiliation(s)
- I Nyoman P Riasa
- From the Plastic Reconstructive and Aesthetic Surgery IGNG Prof Ngoerah Hospital, Udayana University, Denpasar, Bali, Indonesia
| | - Bertha Kawilarang
- From the Plastic Reconstructive and Aesthetic Surgery IGNG Prof Ngoerah Hospital, Udayana University, Denpasar, Bali, Indonesia
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Vargas E, Mummaneni PV, Rivera J, Huang J, Berven SH, Braunstein SE, Chou D. Wound complications in metastatic spine tumor patients with and without preoperative radiation. J Neurosurg Spine 2023; 38:265-270. [PMID: 36461846 DOI: 10.3171/2022.8.spine22757] [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: 08/06/2022] [Accepted: 08/19/2022] [Indexed: 02/04/2023]
Abstract
OBJECTIVE Wound complications are a common adverse event following metastatic spine tumor surgery. Some patients with spinal metastases may first undergo radiation but eventually require spinal surgery because of either cord compression or instability. The authors compared wound complication rates in patients who had undergone surgery for metastatic disease and received preoperative radiation treatments, postoperative radiation, or no radiation. METHODS Records from patients treated at the University of California, San Francisco, for metastatic spine disease between 2005 and 2017 were retrospectively reviewed. Baseline characteristics were collected, including preoperative Karnofsky Performance Status (KPS), Spine Instability Neoplastic Score, total radiation dose, indication for surgery, diabetes status, time between radiation and surgery, use of perioperative chemotherapy or steroids, estimated blood loss, extent of fusion, and preoperative albumin level. Wound complication was defined as poor healing, dehiscence, or infection per the Centers for Disease Control and Prevention guidelines, within 6 months of surgery. One-way ANOVA was used to compare means across groups. Cumulative incidence analysis with competing risk methodology was used to adjust for risk of death during follow-up. Statistical analysis was performed using R software. RESULTS Two hundred five patients with adequate medical records were identified. Seventy patients had received preoperative radiation, 74 had received postoperative radiation within 6 months after surgery, and 61 had received no radiation at the surgical site. Wound complication rates were similar across the 3 cohorts: 14.3% (n = 10) in the group with preoperative radiation, 10.8% (n = 8) in the group that received postoperative radiation, and 11.5% (n = 7) in the group with no radiation (p = 0.773). Competing risk analysis showed a higher cumulative incidence of wound complications for the preoperative cohort, though this difference was not significant (p = 0.46). Overall, 89 patients were treated with external beam radiation therapy (EBRT), whereas 55 received stereotactic body radiation therapy (SBRT). There was no significant difference in wound complications for patients treated with EBRT (11.2%, n = 10) versus SBRT (14.5%, n = 8; p = 0.825). KPS was the only factor correlated with wound complications on univariate analysis (p = 0.03). CONCLUSIONS Wound complication rates did not differ across the 3 cohorts: patients treated with preoperative radiation, postoperative radiation within 6 months of surgery, or no radiation. The effect size was small for KPS and likely does not represent a clinically significant predictor of wound complications.
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Affiliation(s)
- Enrique Vargas
- Departments of1Neurosurgery
- 4School of Medicine, University of California, San Francisco, California
| | | | | | | | - Sigurd H Berven
- 3Orthopedic Surgery, University of California, San Francisco; and
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Berjano P, Baroncini A, Cecchinato R, Langella F, Boriani S. En-bloc resection of a chordoma in L3 by a combined open posterior and less invasive retroperitoneal approach: technical description and case report. Arch Orthop Trauma Surg 2023; 143:801-808. [PMID: 34562120 DOI: 10.1007/s00402-021-04177-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 09/09/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION To fulfill oncological criteria, extensive open anterior and posterior approaches are usually performed in the lumbar spine to obtain an appropriate en-bloc spondylectomy. It is commonly accepted that the price of a tumor-free margin includes such extensive incisions and soft-tissue damage, with consequent relevant blood loss and possible postoperative complications as delayed wound healing. In this article, a case of chordoma in L3 is presented, submitted to an oncologically appropriate en-bloc resection performed by an open posterior approach combined with a mini-retroperitoneal approach. The successful oncologic procedure was combined with a short and uneventful postoperative course. MATERIALS AND METHODS The authors present the surgical technique and the possible challenges of minimally invasive anterior oncologic surgery as a contribution to a limited literature. RESULTS Up to date, palliative care of single metastases has been the main setting in which anterior, minimally invasive surgery has been performed in the lumbar spine. The authors explained how, in selected cases, this approach can be performed in combination with an open posterior access for an oncologically appropriate treatment of a primary malignant tumor. CONCLUSION Anterior, minimally invasive surgery can have a role in selected patients with primary malignant tumors of the lumbar spine. The surgical team should have extensive training both in oncologic and minimally invasive surgery.
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Affiliation(s)
- Pedro Berjano
- IRCCS Istituto Ortopedico Galeazzi, Via Riccardo Galeazzi 4, 20161, Milan, Italy
| | - Alice Baroncini
- IRCCS Istituto Ortopedico Galeazzi, Via Riccardo Galeazzi 4, 20161, Milan, Italy. .,Department of Orthopaedics, RWTH Uniklinik Aachen, Aachen, Germany.
| | - Riccardo Cecchinato
- IRCCS Istituto Ortopedico Galeazzi, Via Riccardo Galeazzi 4, 20161, Milan, Italy
| | - Francesco Langella
- IRCCS Istituto Ortopedico Galeazzi, Via Riccardo Galeazzi 4, 20161, Milan, Italy
| | - Stefano Boriani
- IRCCS Istituto Ortopedico Galeazzi, Via Riccardo Galeazzi 4, 20161, Milan, Italy
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Massaad E, Bridge CP, Kiapour A, Fourman MS, Duvall JB, Connolly ID, Hadzipasic M, Shankar GM, Andriole KP, Rosenthal M, Schoenfeld AJ, Bilsky MH, Shin JH. Evaluating frailty, mortality, and complications associated with metastatic spine tumor surgery using machine learning-derived body composition analysis. J Neurosurg Spine 2022; 37:263-273. [PMID: 35213829 DOI: 10.3171/2022.1.spine211284] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 01/05/2022] [Indexed: 01/06/2023]
Abstract
OBJECTIVE Cancer patients with spinal metastases may undergo surgery without clear assessments of prognosis, thereby impacting the optimal palliative strategy. Because the morbidity of surgery may adversely impact recovery and initiation of adjuvant therapies, evaluation of risk factors associated with mortality risk and complications is critical. Evaluation of body composition of cancer patients as a surrogate for frailty is an emerging area of study for improving preoperative risk stratification. METHODS To examine the associations of muscle characteristics and adiposity with postoperative complications, length of stay, and mortality in patients with spinal metastases, the authors designed an observational study of 484 cancer patients who received surgical treatment for spinal metastases between 2010 and 2019. Sarcopenia, muscle radiodensity, visceral adiposity, and subcutaneous adiposity were assessed on routinely available 3-month preoperative CT images by using a validated deep learning methodology. The authors used k-means clustering analysis to identify patients with similar body composition characteristics. Regression models were used to examine the associations of sarcopenia, frailty, and clusters with the outcomes of interest. RESULTS Of 484 patients enrolled, 303 had evaluable CT data on muscle and adiposity (mean age 62.00 ± 11.91 years; 57.8% male). The authors identified 2 clusters with significantly different body composition characteristics and mortality risks after spine metastases surgery. Patients in cluster 2 (high-risk cluster) had lower muscle mass index (mean ± SD 41.16 ± 7.99 vs 50.13 ± 10.45 cm2/m2), lower subcutaneous fat area (147.62 ± 57.80 vs 289.83 ± 109.31 cm2), lower visceral fat area (82.28 ± 48.96 vs 239.26 ± 98.40 cm2), higher muscle radiodensity (35.67 ± 9.94 vs 31.13 ± 9.07 Hounsfield units [HU]), and significantly higher risk of 1-year mortality (adjusted HR 1.45, 95% CI 1.05-2.01, p = 0.02) than individuals in cluster 1 (low-risk cluster). Decreased muscle mass, muscle radiodensity, and adiposity were not associated with a higher rate of complications after surgery. Prolonged length of stay (> 7 days) was associated with low muscle radiodensity (mean 30.87 vs 35.23 HU, 95% CI 1.98-6.73, p < 0.001). CONCLUSIONS Body composition analysis shows promise for better risk stratification of patients with spinal metastases under consideration for surgery. Those with lower muscle mass and subcutaneous and visceral adiposity are at greater risk for inferior outcomes.
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Affiliation(s)
- Elie Massaad
- 1Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston
| | - Christopher P Bridge
- 2Massachusetts General Hospital and Brigham and Women's Hospital Center for Clinical Data Science, Harvard Medical School, Boston
- 4Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston
| | - Ali Kiapour
- 1Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston
| | - Mitchell S Fourman
- 3Department of Orthopedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston
| | - Julia B Duvall
- 1Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston
| | - Ian D Connolly
- 1Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston
| | - Muhamed Hadzipasic
- 1Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston
| | - Ganesh M Shankar
- 1Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston
| | - Katherine P Andriole
- 2Massachusetts General Hospital and Brigham and Women's Hospital Center for Clinical Data Science, Harvard Medical School, Boston
- 4Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston
| | - Michael Rosenthal
- 4Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston
- 5Department of Radiology, Dana Farber Cancer Institute, Boston
| | - Andrew J Schoenfeld
- 6Department of Orthopedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; and
| | - Mark H Bilsky
- 7Department of Neurological Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - John H Shin
- 1Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston
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Zaborovskii NS, Ptashnikov DA, Mikhailov DA, Smekalenkov OA, Masevnin SV, Diusenov DO, Kazantsev ND. Complications in spinal tumor surgery (review of literature). GREKOV'S BULLETIN OF SURGERY 2022. [DOI: 10.24884/0042-4625-2022-181-2-92-99] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Combined anterior and posterior approaches are required in spinal tumor surgery and considered highly invasive. Anatomical and physiological features of the surgical intervention area should be taken into consideration as well. Thus, these criteria reflect the severity of intraoperative complications during the surgical treatment of spinal tumors. The authors reviewed the scientific literature on the frequency and nature of complications in surgical interventions for spinal tumors.The most significant risk factors for intraoperative complications have been considered, the main of which are: the proximity of the location of the main vessels and viscera, the development of postoperative liquorrhea, as well as surgical site infection. Based on the studied information, we presented the methods of prevention and surgical tactics options in complications.
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Affiliation(s)
- N. S. Zaborovskii
- Russian Scientific Research Institute of Traumatology and Orthopedics named after R. R. Vreden; Saint Petersburg University
| | - D. A. Ptashnikov
- Russian Scientific Research Institute of Traumatology and Orthopedics named after R. R. Vreden; North-Western State Medical University named after I. I. Mechnikov
| | - D. A. Mikhailov
- Russian Scientific Research Institute of Traumatology and Orthopedics named after R. R. Vreden
| | - O. A. Smekalenkov
- Russian Scientific Research Institute of Traumatology and Orthopedics named after R. R. Vreden
| | - S. V. Masevnin
- Russian Scientific Research Institute of Traumatology and Orthopedics named after R. R. Vreden
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Donnally CJ, Henstenburg JM, Pezzulo JD, Farronato D, Patel PD, Sherman M, Canseco JA, Kepler CK, Vaccaro AR. Increased Surgical Site Subcutaneous Fat Thickness Is Associated with Infection after Posterior Cervical Fusion. Surg Infect (Larchmt) 2022; 23:364-371. [PMID: 35262398 DOI: 10.1089/sur.2021.271] [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: 11/13/2022] Open
Abstract
Background: Previous literature has associated increased body mass index (BMI) with risk of surgical site infection (SSI) after posterior cervical fusion (PCF) surgery. However, few studies have examined the association between local adiposity and risk of SSI, re-admission, and re-operation after PCF. Local adiposity is easily measured on pre-operative magnetic resonance imaging (MRI) and may act as a more accurate predictor compared with BMI. Patients and Methods: Subjects undergoing PCF from 2013-2018 at a single institution were identified retrospectively. Posterior cervical subcutaneous fat thickness, paraspinal muscle thickness, and lamina-to-skin distance measurements were obtained from computed tomography (CT) or MRI scans. Subjects with active infection, malignancy, or revision procedures were excluded. Results: Two hundred five patients were included with 20 developing SSIs. Subjects with SSIs had a longer fusion construct (4.90 vs. 3.71 levels; p = 0.001), higher Elixhauser comorbidity index (ECI; 2.05 vs. 1.34; p = 0.045), had a history of diabetes mellitus (30% vs. 10.8%; p = 0.026), higher subcutaneous fat thickness (30.5 vs. 23.6 mm; p = 0.013), and higher lamina-to-skin distance (66.4 vs. 57.9 mm; p = 0.027). Subcutaneous fat thickness (odds ratio [OR], 1.05; 95% confidence interval [CI], 1.01-1.10]; p = 0.026) and lamina-to-skin distance (OR, 1.05; 95% CI, 1.01-1.09]; p = 0.014) were associated with SSI in multivariable analysis. A subcutaneous fat thickness cutoff value of 23.2 mm had 90% sensitivity and 54.1% specificity for prediction of SSI. There was no association need for re-admission or re-operation. Conclusions: Increased posterior cervical fat may increase the risk of SSI after PCF. Pre-operative advanced imaging may be a valuable tool for assisting with patient counseling, optimization, and risk stratification.
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Affiliation(s)
- Chester J Donnally
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Jeffery M Henstenburg
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Joshua D Pezzulo
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Dominic Farronato
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Parthik D Patel
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Matthew Sherman
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Jose A Canseco
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Christopher K Kepler
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Alexander R Vaccaro
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
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12
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Feler J, Sun F, Bajaj A, Hagan M, Kanekar S, Sullivan PLZ, Fridley JS, Gokaslan ZL. Complication Avoidance in Surgical Management of Vertebral Column Tumors. Curr Oncol 2022; 29:1442-1454. [PMID: 35323321 PMCID: PMC8947448 DOI: 10.3390/curroncol29030121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 02/16/2022] [Accepted: 02/22/2022] [Indexed: 11/23/2022] Open
Abstract
The surgical management of spinal tumors has grown increasingly complex as treatment algorithms for both primary bone tumors of the spine and metastatic spinal disease have evolved in response to novel surgical techniques, rising complication rates, and additional data concerning adjunct therapies. In this review, we discuss actionable interventions for improved patient safety in the operative care for spinal tumors. Strategies for complication avoidance in the preoperative, intraoperative, and postoperative settings are discussed for approach-related morbidities, intraoperative hemorrhage, wound healing complications, cerebrospinal fluid (CSF) leak, thromboembolism, and failure of instrumentation and fusion. These strategies center on themes such as pre-operative imaging review and medical optimization, surgical dissection informed by meticulous attention to anatomic boundaries, and fastidious wound closure followed by thorough post-operative care.
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Affiliation(s)
- Joshua Feler
- The Warren Alpert Medical School of Brown University, Providence, RI 02912, USA; (J.F.); (F.S.); (A.B.); (M.H.); (S.K.); (P.L.Z.S.); (J.S.F.)
- Department of Neurosurgery, Rhode Island Hospital, Providence, RI 02903, USA
| | - Felicia Sun
- The Warren Alpert Medical School of Brown University, Providence, RI 02912, USA; (J.F.); (F.S.); (A.B.); (M.H.); (S.K.); (P.L.Z.S.); (J.S.F.)
- Department of Neurosurgery, Rhode Island Hospital, Providence, RI 02903, USA
| | - Ankush Bajaj
- The Warren Alpert Medical School of Brown University, Providence, RI 02912, USA; (J.F.); (F.S.); (A.B.); (M.H.); (S.K.); (P.L.Z.S.); (J.S.F.)
| | - Matthew Hagan
- The Warren Alpert Medical School of Brown University, Providence, RI 02912, USA; (J.F.); (F.S.); (A.B.); (M.H.); (S.K.); (P.L.Z.S.); (J.S.F.)
| | - Samika Kanekar
- The Warren Alpert Medical School of Brown University, Providence, RI 02912, USA; (J.F.); (F.S.); (A.B.); (M.H.); (S.K.); (P.L.Z.S.); (J.S.F.)
| | - Patricia Leigh Zadnik Sullivan
- The Warren Alpert Medical School of Brown University, Providence, RI 02912, USA; (J.F.); (F.S.); (A.B.); (M.H.); (S.K.); (P.L.Z.S.); (J.S.F.)
- Department of Neurosurgery, Rhode Island Hospital, Providence, RI 02903, USA
| | - Jared S. Fridley
- The Warren Alpert Medical School of Brown University, Providence, RI 02912, USA; (J.F.); (F.S.); (A.B.); (M.H.); (S.K.); (P.L.Z.S.); (J.S.F.)
- Department of Neurosurgery, Rhode Island Hospital, Providence, RI 02903, USA
| | - Ziya L. Gokaslan
- The Warren Alpert Medical School of Brown University, Providence, RI 02912, USA; (J.F.); (F.S.); (A.B.); (M.H.); (S.K.); (P.L.Z.S.); (J.S.F.)
- Department of Neurosurgery, Rhode Island Hospital, Providence, RI 02903, USA
- Correspondence:
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13
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Jaman E, Zhang X, Allen J, Saraiya RG, Tollefson S, Hamilton DK, Amankulor NM. Percutaneous fixation for the treatment of metastatic spinal disease provides effective symptom palliation with low rates of hardware failure. Surg Neurol Int 2022; 13:50. [PMID: 35242416 PMCID: PMC8888300 DOI: 10.25259/sni_1110_2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 01/07/2022] [Indexed: 12/02/2022] Open
Abstract
Background: The incidence of survival from metastatic spinal disease (MSD) continues to rise. However, open surgery for MSD is associated with significant perioperative morbidity, while minimally invasive percutaneous pedicle screw fixation (MIPPSF) offers reduced tissue trauma, less blood loss, and a reduction in complications. Lytic bone disease plus perioperative radiation further increase risk for instrument failure, especially in long construct MIPPSF. Here, we compared 6 short construct and 14 long construct outcomes for MIPPSF performed in MSD patients, including multiple myeloma (MM). Methods: For 20 patients undergoing MIPPSF for MSD, we evaluated disease type, location, the extent of surgery, outcomes, and survival rates. Statistical comparisons were performed between long-segment construct and short-segment construct patients utilizing Kaplan–Meier survival curves, Mann–Whitney U, and Chi-squared tests. Results: No instrument failure and comparable symptomatic relief were observed for both short and long MIPPSF constructs. However, long construct patients experienced; a higher incidence of postoperative complications, including screw loosening, but exhibited longer overall survivals (likely related to underlying type of MSD, with MM patients making up the largest portion of long construct patients). Conclusion: Long construct MIPPSF in MSD did not have increased risk of construct failure and offered effective symptomatic relief, including for MM patients, without introducing a greater risk construct instability.
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Affiliation(s)
- Emade Jaman
- Department of Neurological Surgery, University of Pittsburgh School of Medicine, UPMC Presbyterian, Pittsburgh, Pennsylvania, United States
| | - Xiaoran Zhang
- Department of Neurological Surgery, University of Pittsburgh Medical Center, UPMC Presbyterian, Pittsburgh, Pennsylvania, United States
| | - Jordan Allen
- Department of Neurological Surgery, Albert Einstein College of Medicine, Bronx, New York, United States
| | - Raj G. Saraiya
- Department of Neurological Surgery, University of Pittsburgh School of Medicine, UPMC Presbyterian, Pittsburgh, Pennsylvania, United States
| | - Savannah Tollefson
- Department of Neurological Surgery, University of Pittsburgh School of Medicine, UPMC Presbyterian, Pittsburgh, Pennsylvania, United States
| | - D. Kojo Hamilton
- Department of Neurological Surgery, University of Pittsburgh Medical Center, UPMC Presbyterian, Pittsburgh, Pennsylvania, United States
| | - Nduka M. Amankulor
- Department of Neurological Surgery, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania, United States
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14
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Gutiérrez-González R, Zamarrón Á, Ortega C, Hamre F, Kalantari T, Rodríguez-Boto G. Oral extrusion of a vertebral body replacement device after chordoma tumor growth and radiation: case report and review. BMC Surg 2022; 22:22. [PMID: 35065621 PMCID: PMC8783500 DOI: 10.1186/s12893-022-01481-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 01/12/2022] [Indexed: 11/24/2022] Open
Abstract
Background Screw migration following anterior cervical discectomy and fusion is a very rare complication and it is often related to device failure. Even more exceptional is the extrusion of an intervertebral graft. Case presentation We report the second case of migration and extrusion through the oral cavity of a cervical vertebral body replacement device (expandable cylinder) in a patient that had undergone cervical corpectomy due to a vertebral chordoma. Conclusion The antecedent of radiation therapy as well as progressive tumor re-growth may have favored the development of this complication. A literature review is added.
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15
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Hersh AM, Feghali J, Hung B, Pennington Z, Schilling A, Antar A, Patel J, Ehresman J, Cottrill E, Lubelski D, Elsamadicy AA, Goodwin CR, Lo SFL, Sciubba DM. A Web-Based Calculator for Predicting the Occurrence of Wound Complications, Wound Infection, and Unplanned Reoperation for Wound Complications in Patients Undergoing Surgery for Spinal Metastases. World Neurosurg 2021; 155:e218-e228. [PMID: 34403800 DOI: 10.1016/j.wneu.2021.08.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 08/08/2021] [Accepted: 08/09/2021] [Indexed: 01/05/2023]
Abstract
BACKGROUND In the present study, we identified the risk factors for wound complications, wound infection, and reoperation for wound complications after spine metastasis surgery and deployed the resultant model as a web-based calculator. METHODS Patients treated at a single comprehensive cancer center during a 7-year period were included. The demographics, pathology, comorbidities, laboratory values, and operative details were collected. Factors with P < 0.15 on univariable regression were entered into multivariable logistic regression to generate predictive models internally validated using 1000 bootstrapped samples. RESULTS Of the 330 patients included, 29 (7.6%) had experienced a surgical site infection. The independent predictive factors for wound-related complications were a higher Charlson comorbidity index (CCI; odds ratio [OR], 1.41 per point; P < 0.01), Karnofsky performance scale score ≤70 (OR, 2.14; P = 0.04), lower platelet count (OR, 0.49 per 105/μL; P < 0.01), revision versus index surgery (OR, 3.10; P = 0.02), and increased incision length (OR, 1.21 per level; P = 0.02). Wound infection was associated with a higher CCI (OR, 1.60 per point; P < 0.01), a lower platelet count (OR, 0.35 per 105/μL; P < 0.01), revision surgery (OR, 4.63; P = 0.01), and a longer incision length (OR, 1.25 per level; P = 0.03). Unplanned reoperation for wound complications was predicted by a higher CCI (OR, 1.39 per point; P = 0.003), prior irradiation (OR, 2.52; P = 0.04), a lower platelet count (OR, 0.57 per 105/μL; P = 0.02), and revision surgery (OR, 3.34; P = 0.03), The optimism-corrected areas under the curve were 0.75, 0.81, and 0.72 for the wound complication, infection, and reoperation models, respectively. CONCLUSIONS Low platelet counts, poorer health status, more invasive surgery, and revision surgery all independently predicted the risk of wound complications, including infection and unplanned reoperation for infection. Validation of the calculators in a prospective study is merited.
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Affiliation(s)
- Andrew M Hersh
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - James Feghali
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Bethany Hung
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Zach Pennington
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Andy Schilling
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Albert Antar
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jaimin Patel
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jeff Ehresman
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; Department of Neurosurgery, Barrow Neurological Institute, Phoenix, Arizona, USA
| | - Ethan Cottrill
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Daniel Lubelski
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Aladine A Elsamadicy
- Department of Neurosurgery, Yale University School of Medicine, New Haven, Connecticut, USA
| | - C Rory Goodwin
- Department of Neurosurgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Sheng-Fu Larry Lo
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; Department of Neurosurgery, Zucker School of Medicine at Hofstra, Long Island Jewish Medical Center and North Shore University Hospital, Northwell Health, Manhasset, New York, USA
| | - Daniel M Sciubba
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; Department of Neurosurgery, Zucker School of Medicine at Hofstra, Long Island Jewish Medical Center and North Shore University Hospital, Northwell Health, Manhasset, New York, USA.
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16
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Hersh AM, Pennington Z, Schilling AT, Porras J, Hung B, Antar A, Patel J, Lubelski D, Feghali J, Goodwin CR, Lo SFL, Sciubba DM. Plastic surgery wound closure following resection of spinal metastases. Clin Neurol Neurosurg 2021; 207:106800. [PMID: 34280676 DOI: 10.1016/j.clineuro.2021.106800] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 06/13/2021] [Accepted: 07/05/2021] [Indexed: 01/04/2023]
Abstract
OBJECTIVE Surgical site infection and dehiscence are devastating complications of surgery for spinal metastases. Wound closure involving plastic surgeons has been proposed as a strategy to lower post-operative complications. Here we investigated whether plastic surgery closure is associated with lower rates of wound complications, wound infection, and wound reoperation compared to simple closure by spine surgeons. METHODS Patients surgically treated for metastatic tumors at a single comprehensive cancer center between April 2013-2020 were retrospectively identified. Primary pathology, demographic information, clinical characteristics, pre-operative laboratory values, tumor location, operative characteristics, and post-operative outcomes were collected. Univariable analyses used student t-tests for continuous variables and χ2 tests for categorical variables. Multivariable regressions were performed to control for confounders. RESULTS We included 317 patients, of which 56 underwent closure by plastic surgeons and 291 by neurosurgeons. Patients in the plastic surgery cohort were more likely to have received prior radiation to the surgical site, more often on long-term corticosteroid therapy, and more likely to have sacrococcygeal tumors. Operations involving plastic surgeons were more likely to be revision surgeries, corpectomies, and to involve a staged approach. Additionally, patients in the plastic surgery cohort had longer incision lengths, longer surgeries, greater intraoperative blood loss (IOBL), were more likely to receive transfusions, and had longer hospitalizations. Local paraspinous advancement flaps were the most common complex wound closure technique. Plastic surgery closure was not significantly associated with a difference in rates of post-operative wound complications, wound infection, or wound-related reoperations compared to simple wound closure. CONCLUSION We identified that patients undergoing plastic surgery wound closure had worse baseline risk, longer surgeries, greater IOBL, and longer hospitalizations compared to patients receiving simple closure. Despite their increased risk, complex wound closure did not significantly alter the rates of post-operative wound complications, wound infection, or wound-related reoperations. Consideration may be given to plastic surgery closure in patients at high risk of wound complications or with extensive wound defects.
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Affiliation(s)
- Andrew M Hersh
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Zach Pennington
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Neurosurgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Andrew T Schilling
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jose Porras
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Bethany Hung
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Albert Antar
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jaimin Patel
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Daniel Lubelski
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - James Feghali
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - C Rory Goodwin
- Department of Neurosurgery, Duke University School of Medicine, Durham, NC 27710, USA
| | - Sheng-Fu Larry Lo
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Neurosurgery, Zucker School of Medicine at Hofstra, Long Island Jewish Medical Center and North Shore University Hospital, Northwell Health, Manhasset, NY 11030, USA
| | - Daniel M Sciubba
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Neurosurgery, Zucker School of Medicine at Hofstra, Long Island Jewish Medical Center and North Shore University Hospital, Northwell Health, Manhasset, NY 11030, USA.
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Massaad E, Rolle M, Hadzipasic M, Kiapour A, Shankar GM, Shin JH. Safety and efficacy of cement augmentation with fenestrated pedicle screws for tumor-related spinal instability. Neurosurg Focus 2021; 50:E12. [PMID: 33932920 DOI: 10.3171/2021.2.focus201121] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 02/16/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Achieving rigid spinal fixation can be challenging in patients with cancer-related instability, as factors such as osteopenia, radiation, and immunosuppression adversely affect bone quality. Augmenting pedicle screws with cement is a strategy to overcome construct failure. This study aimed to assess the safety and efficacy of cement augmentation with fenestrated pedicle screws in patients undergoing posterior, open thoracolumbar surgery for spinal metastases. METHODS A retrospective review was performed for patients who underwent surgery for cancer-related spine instability from 2016 to 2019 at the Massachusetts General Hospital. Patient demographics, surgical details, radiographic characteristics, patterns of cement extravasation, complications, and prospectively collected Patient-Reported Outcomes Measurement Information System Pain Interference and Pain Intensity scores were analyzed using descriptive statistics. Logistic regression was performed to determine factors associated with cement extravasation. RESULTS Sixty-nine patients underwent open posterior surgery with a total of 502 cement-augmented screws (mean 7.8 screws per construct). The median follow-up period for those who survived past 90 days was 25.3 months (IQR 10.8-34.6 months). Thirteen patients (18.8%) either died within 90 days or were lost to follow-up. Postoperative CT was performed to assess the instrumentation and patterns of cement extravasation. There was no screw loosening, pullout, or failure. The rate of cement extravasation was 28.9% (145/502), most commonly through the segmental veins (77/145, 53.1%). Screws breaching the lateral border of the pedicle but with fenestrations within the vertebral body were associated with a higher risk of leakage through the segmental veins compared with screws without any breach (OR 8.77, 95% CI 2.84-29.79; p < 0.001). Cement extravasation did not cause symptoms except in 1 patient who developed a symptomatic thoracic radiculopathy requiring decompression. There was 1 case of asymptomatic pulmonary cement embolism. Patients experienced significant pain improvement at the 3-month follow-up, with decreases in Pain Interference (mean change 15.8, 95% CI 14.5-17.1; p < 0.001) and Pain Intensity (mean change 28.5, 95% CI 26.7-30.4; p < 0.001). CONCLUSIONS Cement augmentation through fenestrated pedicle screws is a safe and effective option for spine stabilization in the cancer population. The risk of clinically significant adverse events from cement extravasation is very low.
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Yee TJ, Saadeh YS, Strong MJ, Ward AL, Elswick CM, Srinivasan S, Park P, Oppenlander ME, Spratt DE, Jackson WC, Szerlip NJ. Survival, fusion, and hardware failure after surgery for spinal metastatic disease. J Neurosurg Spine 2021; 34:665-672. [PMID: 33513569 DOI: 10.3171/2020.8.spine201166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 08/24/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Decompression with instrumented fusion is commonly employed for spinal metastatic disease. Arthrodesis is typically sought despite limited knowledge of fusion outcomes, high procedural morbidity, and poor prognosis. This study aimed to describe survival, fusion, and hardware failure after decompression and fusion for spinal metastatic disease. METHODS The authors retrospectively examined a prospectively collected, single-institution database of adult patients undergoing decompression and instrumented fusion for spinal metastases. Patients were followed clinically until death or loss to follow-up. Fusion was assessed using CT when performed for oncological surveillance at 6-month intervals through 24 months postoperatively. Estimated cumulative incidences for fusion and hardware failure accounted for the competing risk of death. Potential risk factors were analyzed with univariate Fine and Gray proportional subdistribution hazard models. RESULTS One hundred sixty-four patients were identified. The mean age ± SD was 62.2 ± 10.8 years, 61.6% of patients were male, 98.8% received allograft and/or autograft, and 89.6% received postoperative radiotherapy. The Kaplan-Meier estimate of median survival was 11.0 months (IQR 3.5-37.8 months). The estimated cumulative incidences of any fusion and of complete fusion were 28.8% (95% CI 21.3%-36.7%) and 8.2% (95% CI 4.1%-13.9%). Of patients surviving 6 and 12 months, complete fusion was observed in 12.5% and 16.1%, respectively. The estimated cumulative incidence of hardware failure was 4.2% (95% CI 1.5-9.3%). Increasing age predicted hardware failure (HR 1.2, p = 0.003). CONCLUSIONS Low rates of complete fusion and hardware failure were observed due to the high competing risk of death. Further prospective, case-control studies incorporating nonfusion instrumentation techniques may be warranted.
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Affiliation(s)
| | | | | | | | - Clay M Elswick
- 2Brain and Spine Specialists of North Texas, Arlington, Texas
| | | | | | | | - Daniel E Spratt
- 3Radiation Oncology, University of Michigan, Ann Arbor, Michigan; and
| | - William C Jackson
- 3Radiation Oncology, University of Michigan, Ann Arbor, Michigan; and
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19
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Silva A, Yurac R, Guiroy A, Bravo O, Morales Ciancio A, Landriel F, Hem S. Low Implant Failure Rate of Percutaneous Fixation for Spinal Metastases: A Multicenter Retrospective Study. World Neurosurg 2021; 148:e627-e634. [PMID: 33484887 DOI: 10.1016/j.wneu.2021.01.047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 01/11/2021] [Accepted: 01/12/2021] [Indexed: 01/26/2023]
Abstract
OBJECTIVE To evaluate incidence and types of implant failure observed in a series of patients with spinal metastases (SM) treated with minimally invasive stabilization surgery without fusion. METHODS In this multicenter, retrospective, observational study, we reviewed the files of patients >18 years old who underwent surgery for SM using percutaneous spinal stabilization without fusion with a minimum 3-month follow-up. The following variables were included: demographics, clinical findings, prior radiation history, SM location, epidural spinal cord compression scale, Spinal Instability Neoplastic Scale, neurological examination, and surgery-related data. Primary outcome measure was implant failure rate, as observed in patients' last computed tomography scan. Multivariable analysis was performed to identify baseline factors and factors associated with implant failure. RESULTS Analysis included 72 patients. Mean age of patients was 62 years, 39 patients were men, and 75% of patients had an intermediate Spinal Instability Neoplastic Scale score. Tumor separation surgery was performed in 48.6% of patients. Short instrumentation was indicated in 54.2% of patients. Three patients (4.2%) experienced implant failure (2 screw loosening, 1 screw cut-out); none of them required revision surgery. In 73.6% of cases, survival was >6 months. No significant predictors of failure were identified in the multivariate analysis. CONCLUSIONS A low implant failure rate was observed over the short and medium term, even when short instrumentations without fusion were performed. These findings suggest that minimally invasive stabilization surgery without fusion may be an effective and safe way to treat complicated SM.
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Affiliation(s)
- Alvaro Silva
- Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile.
| | - Ratko Yurac
- Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile
| | - Alfredo Guiroy
- Spine Unit, Orthopedic Department, Hospital Español de Mendoza, Mendoza, Argentina
| | - Oscar Bravo
- Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile
| | | | - Federico Landriel
- Neurosurgery Department, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Santiago Hem
- Neurosurgery Department, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
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20
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Bari TJ, Karstensen S, Sørensen MD, Gehrchen M, Street J, Dahl B. Revision surgery and mortality following complex spine surgery: 2-year follow-up in a prospective cohort of 679 patients using the Spine AdVerse Event Severity (SAVES) system. Spine Deform 2020; 8:1341-1351. [PMID: 32607936 DOI: 10.1007/s43390-020-00164-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 06/19/2020] [Indexed: 12/22/2022]
Abstract
STUDY DESIGN Prospective study. OBJECTIVE To determine the 2-year risk of revision surgery and all-cause mortality after complex spine surgery, and to assess if prospectively registered adverse events (AE) could predict either outcome. Revision surgery and mortality are serious complications to spine surgery. Previous studies of frequency have mainly been retrospective and few studies have employed competing risk survival analyses. In addition, assessment of predictors has focused on preoperative patient characteristics. The effect of perioperative AEs on revision and all-cause mortality risks are not fully understood. METHODS Between January 1 and December 31, 2013, we prospectively included all patients undergoing complex spine surgery at a single, tertiary institution. Complex spine surgery was defined as conditions deemed too complicated for surgery at a secondary institute, or patients with severe comorbidities requiring multidisciplinary observation and treatment. AEs were registered using the Spine Adverse Event Severity system and patients were followed for minimum 2 years regarding revision surgery and all-cause mortality. Incidences were estimated using competing risk survival analyses and correlation between AEs and either outcome was assessed using proportional odds models. RESULTS We included a complete and consecutive cohort of 679 adult and pediatric patients. Demographics, surgical data, AEs, and events of revision or all-cause mortality were registered. The cumulative incidence of 2-year all-cause revision was 19% (16-22%) and all-cause mortality was 15% (12-18%). Deformity surgery was the surgical category with highest incidence of revision and the highest incidence of all-cause mortality was seen in the tumor group. Across surgical categories, cumulative incidences of 2-year revision ranged between 11% (tumor) and 33% (deformity), whilst 2-year all-cause mortality ranged between 3% (deformity) and 33% (tumor). We found that major intraoperative AEs were associated to increased odds of revision. Deep wound infection was associated to increased odds of all-cause mortality. CONCLUSIONS We report the cumulative incidences of revision surgery and all-cause mortality following complex spine surgery. We found higher incidences of revision compared to previous retrospective studies. Prospectively registered AEs were correlated to increased odds of revision surgery and all-cause mortality. These results may serve as reference for future interventional studies and aid in identifying at-risk patients. LEVEL OF EVIDENCE I.
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Affiliation(s)
- Tanvir Johanning Bari
- Spine Unit, Department of Orthopedic Surgery, Rigshospitalet, Copenhagen University Hospital, Blegdamsvej 9, 2100, Copenhagen, Denmark.
| | - Sven Karstensen
- Spine Unit, Department of Orthopedic Surgery, Rigshospitalet, Copenhagen University Hospital, Blegdamsvej 9, 2100, Copenhagen, Denmark
| | - Mathias Dahl Sørensen
- Spine Unit, Department of Orthopedic Surgery, Rigshospitalet, Copenhagen University Hospital, Blegdamsvej 9, 2100, Copenhagen, Denmark
| | - Martin Gehrchen
- Spine Unit, Department of Orthopedic Surgery, Rigshospitalet, Copenhagen University Hospital, Blegdamsvej 9, 2100, Copenhagen, Denmark
| | - John Street
- Combined Neurosurgical and Orthopedic Spine Program, Vancouver General Hospital, University of British Columbia, Floor 6, Blusson Spinal Cord Center, 818 West 10th Ave., Vancouver, BC, V5Z 1M9, Canada
| | - Benny Dahl
- Department of Orthopedics and Scoliosis Surgery, Texas Children's Hospital and Baylor College of Medicine, 6621 Fannin St, Houston, TX, 77030, USA
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Kotecha R, Dea N, Detsky JS, Sahgal A. Management of recurrent or progressive spinal metastases: reirradiation techniques and surgical principles. Neurooncol Pract 2020; 7:i45-i53. [PMID: 33299573 PMCID: PMC7705530 DOI: 10.1093/nop/npaa045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
With the growing incidence of new cases and the increasing prevalence of patients living longer with spine metastasis, a methodological approach to the management of patients with recurrent or progressive disease is increasing in relevance and importance in clinical practice. As a result, disease management has evolved in these patients using advanced surgical and radiotherapy technologies. Five key goals in the management of patients with spine metastases include providing pain relief, controlling metastatic disease at the treated site, improving neurologic deficits, maintaining or improving functional status, and minimizing further mechanical instability. The focus of this review is on advanced reirradiation techniques, given that the majority of patients will be treated with upfront conventional radiotherapy and further treatment on progression is often limited by the cumulative tolerance of nearby organs at risk. This review will also discuss novel surgical approaches such as separation surgery, minimally invasive percutaneous instrumentation, and laser interstitial thermal therapy, which is increasingly being coupled with spine reirradiation to maximize outcomes in this patient population. Lastly, given the complexities of managing recurrent spinal disease, this review emphasizes the importance of multidisciplinary care from neurosurgery, radiation oncology, medical oncology, neuro-oncology, rehabilitation medicine, and palliative care.
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Affiliation(s)
- Rupesh Kotecha
- Department of Radiation Oncology, Miami Cancer Institute, Baptist Health South Florida, Miami, Florida, US
| | - Nicolas Dea
- Combined Neurosurgical and Orthopaedic Spine Program, Vancouver General Hospital, University of British Columbia, Vancouver, Canada
| | - Jay S Detsky
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, University of Toronto, Ontario, Canada
| | - Arjun Sahgal
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, University of Toronto, Ontario, Canada
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Kumar N, Patel R, Tan JH, Song J, Pandita N, Hey DHW, Lau LL, Liu G, Thambiah J, Wong HK. Symptomatic Construct Failure after Metastatic Spine Tumor Surgery. Asian Spine J 2020; 15:481-490. [PMID: 33108849 PMCID: PMC8377214 DOI: 10.31616/asj.2020.0166] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 07/04/2020] [Indexed: 12/23/2022] Open
Abstract
Study Design Retrospective cohort study. Purpose To evaluate the incidence and presentation of symptomatic failures (SFs) after metastatic spine tumor surgery (MSTS). To identify the associated risk factors. To categorize SFs based on the management in these patients. Overview of Literature Few studies have reported on the incidence (1.9%–16%) and risk factors of SF after MSTS. It is unclear whether all SFs, occurring in MSTS-patients, result in revision surgery. Methods We conducted a retrospective analysis on 288 patients (246 for final analysis) who underwent MSTS between 2005–2015. Data collected were demographics and peri/postoperative clinical and radiological features. Early and late radiological SF were defined as presentation before and after 3 months from index surgery, respectively. Univariate and multivariate models of competing risk regression analysis were designed to determine the risk factors for SF with death as a competing event. Results We observed 14 SFs (5.7%) in 246 patients; 10 (4.1%) underwent revision surgery. Median survival was 13.4 months. The mean age was 58.8 years (range, 21–87 years); 48.4% were women. The median time to failure was 5 months (range, 1–60 months). Patients with SF were categorized into three groups: (1) SF when the primary implant was revised (n=5, 35.7%); (2) peri-construct progression of disease requiring extension (n=5, 35.7%); and (3) SFs that did not warrant revision (n=4, 28.5%). Four patients (28.5%) presented with early failure. SF commonly occurred at the implant-bone interface (9/14) and all patients had a spinal instability neoplastic score (SINS) >7. Thirteen patients (92.8%) who developed failure had fixation spanning junctional regions. Multivariate competing risk regression showed that preoperative Eastern Cooperative Oncology Group score was a significant risk factor for implant failure (adjusted sub-hazard ratio, 7.0; 95% confidence interval, 1.63–30.07; p<0.0009). Conclusions The incidence of SF (5.7%) was low in patients undergoing MSTS although these patients did not undergo spinal fusion. Preoperative ambulators involved a 7 times higher risk of failure than non-ambulators. Preoperative SINS >7 and fixations spanning junctional regions were associated with SF. Majority of construct failures occurred at the implant-bone interface.
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Affiliation(s)
- Naresh Kumar
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Ravish Patel
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Jiong Hao Tan
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Joshua Song
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Naveen Pandita
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | | | - Leok Lim Lau
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Gabriel Liu
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Joseph Thambiah
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Hee-Kit Wong
- Department of Orthopaedic Surgery, National University Health System, Singapore
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Kumar N, Patel R, Tan BWL, Tan JH, Pandita N, Sonawane D, Lopez KG, Wai KL, Hey HWD, Kumar A, Liu G. Asymptomatic Construct Failure after Metastatic Spine Tumor Surgery: A New Entity or a Continuum with Symptomatic Failure? Asian Spine J 2020; 15:636-649. [PMID: 33108848 PMCID: PMC8561154 DOI: 10.31616/asj.2020.0167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 06/09/2020] [Indexed: 11/23/2022] Open
Abstract
Study Design Retrospective cohort study. Purpose To study the incidence, onset, underlying mechanism, clinical course, and factors leading to asymptomatic construct failure (AsCF) after metastatic spinal tumor surgery (MSTS). Overview of Literature The reported incidence rates for implant and/or construct failure after MSTS are low (1.9%–16%) and based on clinical presentations and revisions required for symptomatic failures (SFs). AsCF after MSTS has not been reported. Methods We conducted a retrospective analysis of 288 patients (246 for final analysis) who underwent MSTS between 2005–2015. Data collected were demographics and peri/postoperative clinical and radiological features. Early and late radiological AsCF were defined as presentation before and after 3 months, respectively. We analyzed patients with AsCF for risk factors and survival duration by performing competing risk regression analyses where AsCF was the event of interest, with SF and death as competing events. Results We observed AsCF in 41/246 patients (16.7%). The mean time to onset of AsCF after MSTS was 2 months (range, 1–9 months). Median survival of patients with AsCF was 20 and 41 months for early and late failures, respectively. Early AsCF accounted for 80.5% of cases, while late AsCF accounted for 19.5%. The commonest radiologically detectable AsCF mechanism was angular deformity (increase in kyphus) in 29 patients. Increasing age (p<0.02) and primary breast (13/41, 31.7%) (p<0.01) tumors were associated with higher AsCF rates. There was a non-significant trend towards AsCF in patients with a spinal instability neoplastic score ≥7, instrumentation across junctional regions, and construct lengths of 6–9 levels. None of the patients with AsCF underwent revision surgery. Conclusions AsCF after MSTS is a distinct entity. Most patients with early AsCF did not require intervention. Patients who survived and maintained ambulation for longer periods had late failure. Increasing age and tumors with a better prognosis have a higher likelihood of developing AsCF. AsCF is not necessarily an indication for aggressive/urgent intervention.
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Affiliation(s)
- Naresh Kumar
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Ravish Patel
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Barry Wei Loong Tan
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Jiong Hao Tan
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Naveen Pandita
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Dhiraj Sonawane
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Keith Gerard Lopez
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Khin Lay Wai
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | | | - Aravind Kumar
- Department of Orthopaedic Surgery, National University Health System, Singapore
| | - Gabriel Liu
- Department of Orthopaedic Surgery, National University Health System, Singapore
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Hsiue PP, Kelley BV, Chen CJ, Stavrakis AI, Lord EL, Shamie AN, Hornicek FJ, Park DY. Surgical treatment of metastatic spine disease: an update on national trends and clinical outcomes from 2010 to 2014. Spine J 2020; 20:915-924. [PMID: 32087389 DOI: 10.1016/j.spinee.2020.02.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 01/30/2020] [Accepted: 02/13/2020] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Metastatic spine disease (MSD) is becoming more prevalent as medical treatment for cancers advance and extend survival. More MSD patients are treated surgically to maintain neurological function, ambulation, and quality of life. PURPOSE The purpose of this study was to use a large, nationally representative database to examine the trends, patient outcomes, and health-care resource utilization associated with surgical treatment of MSD. DESIGN This was an epidemiologic study using national administrative data from the Nationwide Readmissions Database (NRD). PATIENT SAMPLE All patients in the NRD from 2010 to 2014 who underwent spinal surgery were included in the study. OUTCOME MEASURES Mortality, blood transfusion, complications, length of stay, cost, and discharge location during index hospitalization as well as hospital readmission and revision surgery within 90-days of surgery were analyzed. METHODS International Classification of Diseases, Ninth Revision, (ICD-9) codes was used to identify patients of interest within the NRD from 2010 to 2014. Patients were separated into two cohorts - those with MSD and those without. Trends for surgical treatment of MSD were assessed and outcomes measures for both cohorts were analyzed and compared. RESULTS The number of surgical treatments for MSD increased from 6,007 in 2010 to 7,032 in 2014 (p-trend<.0001) which represented a 17.1% increase. During index hospitalization, MSD patients had an increased risk of mortality (odds ratio [OR]=3.22, 95% confidence interval [CI]: 2.85-3.63, p<.0001), blood transfusion (OR=2.93, 95% CI: 2.66-3.23, p<.0001), any complication (OR=1.24, 95% CI: 1.18-1.31, p<.0001), and discharge to skilled nursing facility (OR=1.51, 95% CI:1.41-1.61, p<.0001). MSD patients had longer average length of stay (13.05 vs. 4.56 days, p<.0001) and cost ($49,421.75 vs. $26,190.37, p<.0001) during index hospitalization. Furthermore, MSD patients had an increased risk of hospital readmission (OR=2.82, 95% CI: 2.68-2.96, p<.0001), readmission for surgical site infection (OR=2.38, 95% CI: 2.20-2.58, p<.0001), and readmission with neurologic deficits (OR=1.62, 95% CI: 1.27-2.06, p<.0001) despite a decreased risk of revision fusion (OR=0.71, 95% CI: 0.53-0.96, p=.026). CONCLUSIONS The number of MSD patients who undergo surgical treatments is increasing. Not only do these patients have worse outcomes during index hospitalization, but they are also at an increased risk of hospital readmission for surgical site infection and neurologic complications. These findings stress the need for multidisciplinary perioperative treatment plans that mitigate risks and facilitate quick, effective recovery in these unique, at-risk patients.
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Affiliation(s)
- Peter P Hsiue
- Department of Orthopedic Surgery, David Geffen School of Medicine at the University of California Los Angeles, 1250 16th St Suite 3142, Santa Monica, Los Angeles, CA, USA
| | - Benjamin V Kelley
- Department of Orthopedic Surgery, David Geffen School of Medicine at the University of California Los Angeles, 1250 16th St Suite 3142, Santa Monica, Los Angeles, CA, USA
| | - Clark J Chen
- Department of Orthopedic Surgery, David Geffen School of Medicine at the University of California Los Angeles, 1250 16th St Suite 3142, Santa Monica, Los Angeles, CA, USA
| | - Alexandra I Stavrakis
- Department of Orthopedic Surgery, David Geffen School of Medicine at the University of California Los Angeles, 1250 16th St Suite 3142, Santa Monica, Los Angeles, CA, USA
| | - Elizabeth L Lord
- Department of Orthopedic Surgery, David Geffen School of Medicine at the University of California Los Angeles, 1250 16th St Suite 3142, Santa Monica, Los Angeles, CA, USA
| | - Arya N Shamie
- Department of Orthopedic Surgery, David Geffen School of Medicine at the University of California Los Angeles, 1250 16th St Suite 3142, Santa Monica, Los Angeles, CA, USA
| | - Francis J Hornicek
- Department of Orthopedic Surgery, David Geffen School of Medicine at the University of California Los Angeles, 1250 16th St Suite 3142, Santa Monica, Los Angeles, CA, USA
| | - Don Y Park
- Department of Orthopedic Surgery, David Geffen School of Medicine at the University of California Los Angeles, 1250 16th St Suite 3142, Santa Monica, Los Angeles, CA, USA.
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Complications and Mortality Rates Following Surgical Management of Extradural Spine Tumors in New York State. Spine (Phila Pa 1976) 2020; 45:474-482. [PMID: 31651687 DOI: 10.1097/brs.0000000000003294] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Database analysis. OBJECTIVE To evaluate complications and mortality in patients undergoing surgical management of extradural spinal tumors in New York State. SUMMARY OF BACKGROUND DATA Metastatic spine surgery has a high rate of complications but most studies are limited to single institutions. METHODS The Statewide Planning and Research Cooperative System was used to identify patients with extradural spinal tumors undergoing surgery in New York State from 2006 to 2015. Bivariate and multivariate logistic regression analyses were used to estimate outcomes. RESULTS Four thousand seven hundred sixty-seven patients were identified, the majority of patients were male and white a median age of 61. The complication rate was 17.6% and the mortality rate within 30 days of discharge was 12.2%. Multivariate analysis showed the odds of complications were higher in males compared with females (odds ratio [OR]: 1.27; 95% confidence interval [CI]: 1.05-1.52, P = 0.01), and patients on Medicaid compared with patients on private insurance (OR: 1.42; 95% CI: 1.03-1.96, P = 0.03). Analysis of hospital characteristics showed lower volume hospitals (OR 1.48; 95% CI: 1.03-2.13, P value = 0.03), and teaching hospitals (OR: 1.47; 95% CI: 1.03-2.09, P = 0.04), have higher odds of complications compared with high-volume hospitals and nonteaching hospitals. Multivariate analysis showed higher odds of mortality within 30 days of discharge in patients of older age (OR: 1.02; 95% CI: 1.01-1.03, P value = 0.001), low-volume hospitals compared with high-volume hospitals (OR: 1.36; 95% CI: 1.09-1.79, P value = 0.02), hospitals with low bed size compared with high bed size (OR: 1.43; 95% CI: 1.12-1.83, P value = 0.01), and urban hospitals compared with rural hospitals (OR: 3.04; 95% CI: 2.03-4.56, P value = 0.001). CONCLUSION Low-volume hospitals are associated with complications and mortality in patients with metastatic spine disease. LEVEL OF EVIDENCE 3.
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Patel RS, Wang SSY, Ramos MRD, Najjar HWN, Prasad SV, Kumar N. Vacuum-Assisted Closure: An Effective Technique to Manage Wound Complications After Metastatic Spine Tumour Surgery (MSTS)-A Case Report. Int J Spine Surg 2019; 13:544-550. [PMID: 31970050 DOI: 10.14444/6074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The management of wound complications following metastatic spine tumor surgery (MSTS) remains a formidable task. Plastic coverage procedures after MSTS are challenging due to unhealthy donor sites following previous radiotherapy and prolonged nonambulation. Negative pressure wound therapy (NPWT) is usually not recommended after MSTS due to fear of tumor seeding and excessive blood loss. However, in certain patients post-MSTS, who may be considered as receiving palliative treatment, NPWT can be effective in managing wound complications. We describe our initial experience with the use of NPWT in a 57-year-old lady diagnosed with multiple lumbar and cervicothoracic vertebral metastases secondary to non-small cell lung carcinoma. She underwent 2 cycles of preoperative radiotherapy followed by decompression and posterior instrumentation of lumbosacral and cervicothoracic regions succeeded by another cycle of radiotherapy. The patient developed wound dehiscence and poly-microbial surgical site infection that was not responsive to regular debridements and antibiotics. Hence, we applied NPWT as an alternative treatment to plastic surgical procedures. The patient clinically improved with a reduced quantity of wound discharge, increased granulation tissue, and a downward trend in the inflammatory markers. Subsequently, wound was secondarily closed after 14 days. The patient was discharged after a total hospital stay of 41 days. The intravenous antibiotics (piperacillin/tazobactam) were changed to oral (ciprofloxacin) after 6 weeks and continued for 4 months. The patient survived for 3 years without any wound complications. Our case report suggests that NPWT can be a potential treatment option for managing wound complications following MSTS.
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Affiliation(s)
| | - Samuel Sherng Young Wang
- Prince of Wales Clinical School, Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | | | | | - Samuel Vara Prasad
- Royal National Orthopaedic Hospital, Stanmore, Middlesex, United Kingdom
| | - Naresh Kumar
- Department of Orthopaedic Surgery, National University Hospital, Singapore
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Abstract
STUDY DESIGN Case control series. OBJECTIVE The aim of this study was to evaluate and compare the effectiveness of methods to decrease surgical site infections (SSIs) following spine tumor surgery. SUMMARY OF BACKGROUND DATA With the aging population of the United States, the prevalence of cancer and associated metastatic spine disease is increasing. The most common complication of spine tumor surgery is SSI. METHODS This a single-institution case-control series of patients undergoing spine tumor surgery from June 2003 to October 2018. Patients were grouped into the following groups: Betadine irrigation and intrawound vancomycin powder (BIVP), intrawound vancomycin powder only (IVP), and patients receiving neither (NONE). The primary outcome was SSIs/wound complications. RESULTS One hundred fifty-one spine tumor patients undergoing 174 procedures meeting our inclusion criteria were identified. The BIVP group had 60 patients (73 procedures); the IVP group had 46 patients (47 procedures); and the NONE group had 45 patients (54 procedures). The overall infection rate was 8.6% of all procedures (15/174) and 9.9% (15/151) of all patients. Bivariate analysis comparing patients with and without infections noted the patients with SSIs had significantly higher rates of preoperative radiation treatment (53.3% in infection group vs. 25.5% in noninfection group), P = 0.02. Patients undergoing procedures in the BIVP group had a significantly lower rate of infections (2.7%) than the patients in the IVP (12.8%) and NONE (13%) groups, P = 0.04. Stepwise regression analysis was used to evaluate further factors associated with SSIs. Elevated BMI was significantly associated with SSIs in the model [P = 0.02, odds ratio (OR) 1.14]. BIVP was also protective against infections as compared to the IVP and NONE groups, P = 0.02, OR 0.02. CONCLUSION BIVP led to a significant decrease in SSI rates following spine tumor surgery. Administration of BIVP is not time consuming and decreased SSI rates. LEVEL OF EVIDENCE 3.
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Sankey EW, Park C, Howell EP, Pennington Z, Abd-El-Barr M, Karikari IO, Shaffrey CI, Gokaslan ZL, Sciubba D, Goodwin CR. Importance of Spinal Alignment in Primary and Metastatic Spine Tumors. World Neurosurg 2019; 132:118-128. [PMID: 31476476 DOI: 10.1016/j.wneu.2019.08.161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 08/18/2019] [Accepted: 08/22/2019] [Indexed: 12/12/2022]
Abstract
Spinal alignment, particularly with respect to spinopelvic parameters, is highly correlated with morbidity and health-related quality-of-life outcomes. Although the importance of spinal alignment has been emphasized in the deformity literature, spinopelvic parameters have not been considered in the context of spine oncology. Because the aim of oncologic spine surgery is mostly palliative, consideration of spinopelvic parameters could improve postoperative outcomes in both the primary and metastatic tumor population by taking overall vertebral stability into account. This review highlights the relevance of focal and global spinal alignment, particularly related to spinopelvic parameters, in the treatment of spine tumors.
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Affiliation(s)
- Eric W Sankey
- Department of Neurosurgery, Spine Division, Duke University Medical Center, Durham, North Carolina, USA
| | - Christine Park
- Department of Neurosurgery, Spine Division, Duke University Medical Center, Durham, North Carolina, USA
| | - Elizabeth P Howell
- Department of Neurosurgery, Spine Division, Duke University Medical Center, Durham, North Carolina, USA
| | - Zach Pennington
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Muhammad Abd-El-Barr
- Department of Neurosurgery, Spine Division, Duke University Medical Center, Durham, North Carolina, USA
| | - Isaac O Karikari
- Department of Neurosurgery, Spine Division, Duke University Medical Center, Durham, North Carolina, USA
| | - Christopher I Shaffrey
- Department of Neurosurgery, Spine Division, Duke University Medical Center, Durham, North Carolina, USA
| | - Ziya L Gokaslan
- Department of Neurosurgery, Brown University, Providence, Rhode Island, USA
| | - Daniel Sciubba
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - C Rory Goodwin
- Department of Neurosurgery, Spine Division, Duke University Medical Center, Durham, North Carolina, USA.
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Immediate Reconstruction of Oncologic Spinal Wounds Is Cost-Effective Compared with Conventional Primary Wound Closure. Plast Reconstr Surg 2019; 144:1182-1195. [DOI: 10.1097/prs.0000000000006170] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yahanda AT, Buchowski JM, Wegner AM. Treatment, complications, and outcomes of metastatic disease of the spine: from Patchell to PROMIS. ANNALS OF TRANSLATIONAL MEDICINE 2019; 7:216. [PMID: 31297381 DOI: 10.21037/atm.2019.04.83] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Spinal metastases are common in patients with cancer. As cancer treatments improve and these patients live longer, the number who present with metastatic spine disease will increase. Treatment strategies for these patients continues to evolve. In particular, since the prospective randomized controlled study in 2005 by Patchell et al. showed increased survival with decompressive surgical treatment of spinal metastases, there is a growing body of literature focusing on surgical management and complications of surgery for this disease. Surgery is often one component of a multimodal treatment approach with chemotherapy and radiation, which makes it difficult to parse the benefits of each individual treatment in outcome studies. Additionally, there has been more recent emphasis placed on patient-reported outcomes (PRO) after treatment for metastatic spine disease. In this review, we summarize treatments of metastatic spinal disease, possible perioperative complications, and validated tools used to assess outcomes for these patients.
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Affiliation(s)
- Alexander T Yahanda
- Department of Orthopedic Surgery, Washington University, St. Louis, Missouri, USA
| | - Jacob M Buchowski
- Department of Orthopedic Surgery, Washington University, St. Louis, Missouri, USA
| | - Adam M Wegner
- Department of Orthopedic Surgery, Washington University, St. Louis, Missouri, USA
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Immediate Reconstruction of Complex Spinal Wounds Is Associated with Increased Hardware Retention and Fewer Wound-related Complications: A Systematic Review and Meta-analysis. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2019; 7:e2076. [PMID: 30859036 PMCID: PMC6382244 DOI: 10.1097/gox.0000000000002076] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 10/22/2018] [Indexed: 11/26/2022]
Abstract
Supplemental Digital Content is available in the text. Background: Patients undergoing surgeries involving extensive posterior spine instrumentation and fusion often have multiple risk factors for wound healing complications. We performed a systematic review and meta-analysis of the available evidence on immediate (proactive/prophylactic) and delayed (reactive) spinal wound reconstruction. We hypothesized that immediate soft-tissue reconstruction of extensive spinal wounds would be associated with fewer postoperative surgicalsite complications than delayed reconstruction. Methods: In accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, a PubMed database search was performed to identify English-language, human-subject literature published between 2003 and 2018. Data were summarized, and the pooled prevalence of various wound complications was calculated, weighted by study size, using the generic inverse variance method. A subgroup analysis of all studies with a comparison group (Oxford Centre for Evidence-based Medicine level 3 or better) was performed, and Forest plots were created. Results: The database search yielded 16 articles including 828 patients; 428 (51.7%) received an immediate spinal wound reconstruction and 400 (48.3%) had a delayed reconstruction. Spinal neoplasm was the most common index diagnosis. Paraspinous muscle flap reconstruction was performed in the majority of cases. Pooled analysis of all studies revealed immediate reconstruction to be associated with decreased rates of overall wound complications (28.5% versus 18.8%), hardware loss (10.7% versus 1.8%), and wound infections (10.7% versus 7.6%) compared with delayed reconstruction. Conclusions: Immediate soft-tissue reconstruction of high-risk spinal wounds is associated with fewer wound healing complications and increased hardware retention.
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Ge L, Arul K, Mesfin A. Spinal Cord Injury From Spinal Tumors: Prevalence, Management, and Outcomes. World Neurosurg 2018; 122:e1551-e1556. [PMID: 30471447 DOI: 10.1016/j.wneu.2018.11.099] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 11/09/2018] [Accepted: 11/12/2018] [Indexed: 12/27/2022]
Abstract
BACKGROUND With the aging population in the United States, it can be anticipated that the prevalence of spinal cord injuries (SCIs) and cancer will increase. Primary or metastatic spine tumors sit at a unique intersection of these 2 realms. Our objective was to evaluate the prevalence, outcomes, and complications after the management of SCI arising from spinal tumors. METHODS In the present retrospective evaluation, all patients with SCI and a diagnosis of primary or metastatic spinal cancer who had been admitted to the inpatient rehabilitation unit at a level 1 trauma center from January 2003 to January 2014 were evaluated. The demographic data (age, sex, race/ethnicity), tumor characteristics, American Spinal Injury Association score, and complications were evaluated. RESULTS A total of 757 SCI entries were identified, and 685 unique patients met our inclusion criteria. Of those, 81 had SCIs due to spinal tumors (11.8% of all SCIs and 19.2% of nontraumatic SCIs). Most tumors were located in the thoracic region (65.4%) and were primary central nervous system in origin (21.0%), including meningioma (7.4%), schwannoma (3.7%), and ependymoma (2.5%). The next most common origins of the spinal tumors were metastases from the lung (17.3%), prostate (9.9%), kidney (8.6%), lymphoma (7.4%), and multiple myeloma (7.4%). Of these patients, 76.5% underwent surgical management, with a complications rate of 61.3%. The overall mortality rate at the latest follow-up examination was 63.0%. CONCLUSIONS SCI associated with spinal tumor is often managed surgically and associated with high rates of complications. The present study has demonstrated longer survival rates compared with the existing data.
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Affiliation(s)
- Laurence Ge
- Department of Orthopaedic Surgery, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Karan Arul
- Department of Orthopaedic Surgery, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Addisu Mesfin
- Department of Orthopaedic Surgery, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA.
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Affiliation(s)
- Aleksander Mika
- Department of Orthopaedic Surgery, University of Rochester School of Medicine and Dentistry, Rochester, New York
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Kumar N, Patel R, Wadhwa AC, Kumar A, Milavec HM, Sonawane D, Singh G, Benneker LM. Basic concepts in metal work failure after metastatic spine tumour surgery. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2017; 27:806-814. [DOI: 10.1007/s00586-017-5405-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Revised: 11/07/2017] [Accepted: 11/19/2017] [Indexed: 02/07/2023]
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Zaw AS, Kantharajanna SB, Maharajan K, Tan B, Saparamadu AA, Kumar N. Metastatic spine tumor surgery: does perioperative blood transfusion influence postoperative complications? Transfusion 2017; 57:2790-2798. [DOI: 10.1111/trf.14311] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 06/17/2017] [Accepted: 06/20/2017] [Indexed: 01/28/2023]
Affiliation(s)
- Aye Sandar Zaw
- Department of Orthopaedic Surgery; National University Hospital; Singapore
| | | | | | - Barry Tan
- Department of Orthopaedic Surgery; National University Hospital; Singapore
| | | | - Naresh Kumar
- Department of Orthopaedic Surgery; National University Hospital; Singapore
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Pedreira R, Abu-Bonsrah N, Karim Ahmed A, De la Garza-Ramos R, Rory Goodwin C, Gokaslan ZL, Sacks J, Sciubba DM. Hardware failure in patients with metastatic cancer to the spine. J Clin Neurosci 2017; 45:166-171. [PMID: 28734793 DOI: 10.1016/j.jocn.2017.05.038] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 05/22/2017] [Indexed: 12/26/2022]
Abstract
BACKGROUND The spine is the most common site of skeletal metastases, affecting approximately 30% of individuals with cancer. The aim of surgical treatment for metastatic spine disease is generally palliative to address pain and/or neurologic compromise, significantly improving patients' quality of life. Patients with metastatic spine disease, however, represent a vulnerable cohort and may have comorbidities or previous treatments that impair the structural integrity of spinal hardware. As such, identifying factors that may contribute to hardware failure is an essential component in treating individuals with metastatic spine disease. OBJECTIVE The aim of this study was to identify pre-operative risk factors associated with hardware failure in patients undergoing surgical treatment for metastatic spine disease. METHODS A retrospective cohort study was conducted to include patients surgically treated for metastatic spine tumors between 2003 and 2013, at a single institution. A univariate analysis was initially performed to identify associated factors. Any associated factor with a p-value <0.20 was included in the multivariate analysis. RESULTS 3 patients (1.9%), of the 159 patients included in the study, had failure of the spine instrumentation. 1 patient had metastatic prostate cancer, and 2 had metastatic breast cancer. Patient demographics, co-morbidities, tumor location, and primary tumor etiology were not found to be statistically significant, with respect to hardware failure. Predictive factors included in the multivariate model were other bone metastasis, visceral metastasis, brain metastasis, Modified Rankin scale, previous systemic chemotherapy, previous radiation to the spine, and mean survival. Previous radiation to the spine was the only factor to be significantly associated (p=0.029), present in all three patients with hardware failure. Of note, there was a trend indicating that patients with longer life expectancies were more likely to experience hardware failure (mean survival of 16.7months in non-failure cohort vs. 33months in failure cohort), though this did not achieve statistical significance due to the limited sample size of patients with hardware failure. CONCLUSION Hardware failure is a risk for all patients who undergo instrumentation following resection for metastatic spine tumors. This study identified that pre-operative radiation may increase the risk for hardware failure in this population.
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Affiliation(s)
- Rachel Pedreira
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Nancy Abu-Bonsrah
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - A Karim Ahmed
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | | | - C Rory Goodwin
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ziya L Gokaslan
- Department of Neurosurgery, The Warren Alpert Medical School of Brown University, Providence, RI, USA
| | - Justin Sacks
- Department of Plastic Surgery and Reconstruction, The Johns Hopkins University School of Medicine Baltimore, MD, USA
| | - Daniel M Sciubba
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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