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BACKGROUND AND OBJECTIVES: Sacrectomy is often the treatment of choice to provide the greatest chance of progression-free and overall survival for patients with primary malignant bone tumors of the sacrum. After midsacrectomy, the stability of the sacropelvic interface is diminished, resulting in insufficiency fractures. Traditional stabilization involves lumbopelvic fixation but subjects normal mobile segments to fusion. The purpose of this study was to determine whether standalone intrapelvic fixation is a safe adjunct to midsacrectomy, avoiding both sacral insufficiency fractures and the morbidity of instrumenting into the mobile spine. METHODS: A retrospective study identified all patients who underwent resection of sacral tumors at 2 comprehensive cancer centers between June 2020 and July 2022. Demographic, tumor-specific, operative characteristics and outcome data were collected. The primary outcome was presence of sacral insufficiency fractures. A retrospective data set of patients undergoing midsacrectomy without hardware placement was collected as a control. RESULTS: Nine patients (5 male, 4 female), median age 59 years, underwent midsacrectomy with concomitant placement of standalone pelvic fixation. No patients developed insufficiency fractures during the 216 days of clinical and 207 days of radiographic follow-up. There were no adverse events attributable to the addition of standalone pelvic fixation. In our historical cohort of partial sacrectomies without stabilization, there were 4/25 patients (16%) with sacral insufficiency fractures. These fractures appeared between 0 and 5 months postoperatively. CONCLUSION: A novel standalone intrapelvic fixation after partial sacrectomy is a safe adjunct to prevent postoperative sacral insufficiency fractures in patients undergoing midsacrectomy for tumor. Such a technique may allow for long-term sacropelvic stability without sacrificing mobile lumbar segments.
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Fraturas de Estresse , Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Estudos Retrospectivos , Fixação Interna de Fraturas/métodos , Sacro/diagnóstico por imagem , Sacro/cirurgia , PelveRESUMO
BACKGROUND: Managing patients with hydrocephalus and cerebrospinal fluid (CSF) disorders requires repeated head imaging. In adults, it is typically computed tomography (CT) or less commonly magnetic resonance imaging (MRI). However, CT poses cumulative radiation risks and MRI is costly. Ultrasound is a radiation-free, relatively inexpensive, and optionally point-of-care alternative, but is prohibited by very limited windows through an intact skull. OBJECTIVE: To describe our initial experience with transcutaneous transcranial ultrasound through sonolucent burr hole covers in postoperative hydrocephalus and CSF disorder patients. METHODS: Using cohort study design, infection and revision rates were compared between patients who underwent sonolucent burr hole cover placement during new ventriculoperitoneal shunt placement and endoscopic third ventriculostomy over the 1-year study time period and controls from the period 1 year before. Postoperatively, trans-burr hole ultrasound was performed in the clinic, at bedside inpatient, and in the radiology suite to assess ventricular anatomy. RESULTS: Thirty-seven patients with sonolucent burr hole cover were compared with 57 historical control patients. There was no statistically significant difference in infection rates between the sonolucent burr hole cover group (1/37, 2.7%) and the control group (0/57, P = .394). Revision rates were 13.5% vs 15.8% (P = 1.000), but no revisions were related to the burr hole or cranial hardware. CONCLUSION: Trans-burr hole ultrasound is feasible for gross evaluation of ventricular caliber postoperatively in patients with sonolucent burr hole covers. There was no increase in infection rate or revision rate. This imaging technique may serve as an alternative to CT and MRI in the management of select patients with hydrocephalus and CSF disorders.
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Hidrocefalia , Trepanação , Humanos , Adulto , Estudos de Coortes , Trepanação/métodos , Hidrocefalia/diagnóstico por imagem , Hidrocefalia/cirurgia , Ventriculostomia/métodos , Crânio/cirurgiaRESUMO
BACKGROUND: Total en bloc sacrectomy provides the best long-term local control for large primary bony sacral tumors, but often requires lumbosacral nerve root sacrifice leading to loss of ambulation and/or bowel, bladder, and/or sexual dysfunction. Nerve-sparing techniques may be an option for some patients that avoid these outcomes and accordingly improve postoperative quality of life. OBJECTIVE: To describe the technique for a posterior-only en bloc hemisacrectomy with maximal nerve root preservation and to summarize the available literature. METHODS: A 38-yr-old woman with a 7.7 × 5.4 × 4.5 cm biopsy-proven grade 2 chondrosarcoma involving the left L5-S2 posterior elements underwent a posterior-only left hemisacrectomy tri-rod L3-pelvis fusion. A systematic review of the English literature was also conducted to identify other descriptions of high sacrectomy with distal sacral nerve root preservation. RESULTS: Computer-aided navigation facilitated an extracapsular resection that allowed preservation of the left-sided L5 and S3-Co roots. Negative margins were achieved and postoperatively the patient retained ambulation and good bowel/bladder function. Imaging at 9-mo follow-up showed no evidence of recurrence. The systematic review identified 4 prior publications describing 6 total patients who underwent nerve-sparing sacral resection. Enneking-appropriate resection was only obtained in 1 case though. CONCLUSION: Here we describe a technique for distal sacral nerve root preservation during en bloc hemisacrectomy for a primary sacral tumor. Few prior descriptions exist, and the present technique may help to reduce the neurological morbidity of sacral tumor surgery.
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Condrossarcoma , Neoplasias da Coluna Vertebral , Condrossarcoma/diagnóstico por imagem , Condrossarcoma/cirurgia , Feminino , Humanos , Qualidade de Vida , Sacro/diagnóstico por imagem , Sacro/patologia , Sacro/cirurgia , Neoplasias da Coluna Vertebral/diagnóstico por imagem , Neoplasias da Coluna Vertebral/cirurgia , Resultado do TratamentoRESUMO
High Intensity Focused Ultrasound (HIFU) is an emerging and increasingly useful modality in the treatment of cancer and other diseases. Although traditional use of ultrasound at lower frequencies has primarily been for diagnostic imaging purposes, the development of HIFU has allowed this particular modality to expand into therapeutic use. This non-invasive and acoustic method involves the use of a piezoelectric transducer to deliver high-energy pulses in a spatially coordinated manner, while minimizing damage to tissue outside the target area. This review describes the history of the development of diagnostic and therapeutic ultrasound and explores the biomedical applications utilizing HIFU technology including thermally ablative treatment, therapeutic delivery mechanisms, and neuromodulatory phenomena. The application of HIFU across various tumor types in multiple organ systems is explored in depth, with particular attention to successful models of HIFU in the treatment of various medical conditions. Basic mechanisms, preclinical models, previous clinical use, and ongoing clinical trials are comparatively discussed. Recent advances in HIFU across multiple medical fields reveal the growing importance of this biomedical technology for the care of patients and for the development of possible pathways for the future use of HIFU as a commonplace treatment modality.
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Tratamento por Ondas de Choque Extracorpóreas , Ultrassonografia/métodos , Animais , Doenças do Sistema Nervoso Central/diagnóstico por imagem , Doenças do Sistema Nervoso Central/terapia , Sistemas de Liberação de Medicamentos , Humanos , Neoplasias/diagnóstico por imagem , Neoplasias/terapiaRESUMO
BACKGROUND AND IMPORTANCE: En bloc resection of sacral tumors is the most effective treatment to help prevent recurrence. Sacrectomy, however, can be destabilizing, depending on the extent of resection. Various surgical techniques for improving stability and enabling early ambulation have been proposed. CLINICAL PRESENTATION: Here, we report a case in which we use PMMA (poly[methyl methacrylate]) to augment pelvic instrumentation to improve mechanical stability after sacrectomy for en bloc resection of a solitary fibrous tumor. CONCLUSION: We highlight the use of sacroplasty augmentation of pelvic ring reconstruction to provide biomechanical stability without the need for fusion of any mobile spine segments, which allowed for early patient ambulation and no appreciable loss of range of motion or mobility.
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Procedimentos de Cirurgia Plástica , Neoplasias da Coluna Vertebral , Humanos , Recidiva Local de Neoplasia , Pelve/cirurgia , Sacro/diagnóstico por imagem , Sacro/cirurgia , Neoplasias da Coluna Vertebral/diagnóstico por imagem , Neoplasias da Coluna Vertebral/cirurgiaRESUMO
Nasopharyngeal carcinoma (NPC) is a squamous cell carcinoma with a proclivity for systemic dissemination, leading many patients to present with advanced stage disease and fail available treatments. There is a notable lack of targeted therapies for NPC, despite working knowledge of multiple proteins with integral roles in NPC cancer biology. These proteins include EZH2, Snail, eIF4E, and IMPDH, which are all overexpressed in NPC and correlated with poor prognosis. These proteins are known to be modulated by ribavirin, an FDA-approved hepatitis C antiviral that has recently been repurposed as a promising therapeutic in several solid and hematologic malignancies. Here, we investigated the potential of ribavirin as a targeted anticancer agent in five human NPC cell lines. Using cellular growth assays, flow cytometry, BrdU cell proliferation assays, scratch wound assays, and invasion assays, we show in vitro that ribavirin decreases NPC cellular proliferation, migration, and invasion and promotes cell-cycle arrest and cell death. Modulation of EZH2, Snail, eIF4E, IMPDH, mTOR, and cyclin D1 were observed in Western blots and enzymatic activity assays in response to ribavirin treatment. As monotherapy, ribavirin reduced flank tumor growth in multiple NPC xenograft models in vivo Most importantly, we demonstrate that ribavirin enhanced the effects of radiotherapy, a central component of NPC treatment, both in vitro and in vivo Our work suggests that NPC responds to ribavirin-mediated EZH2, Snail, eIF4E, IMPDH, and mTOR changes and positions ribavirin for clinical evaluation as a potential addition to our NPC treatment armamentarium.
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Pontos de Checagem do Ciclo Celular/efeitos dos fármacos , Pontos de Checagem do Ciclo Celular/efeitos da radiação , Carcinoma Nasofaríngeo/terapia , Neoplasias Nasofaríngeas/terapia , Radiossensibilizantes/administração & dosagem , Ribavirina/administração & dosagem , Animais , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Proliferação de Células/efeitos da radiação , Sobrevivência Celular/efeitos dos fármacos , Sobrevivência Celular/efeitos da radiação , Quimiorradioterapia , Reposicionamento de Medicamentos , Proteína Potenciadora do Homólogo 2 de Zeste/metabolismo , Fator de Iniciação 4E em Eucariotos/metabolismo , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Regulação Neoplásica da Expressão Gênica/efeitos da radiação , Humanos , IMP Desidrogenase/metabolismo , Camundongos , Terapia de Alvo Molecular , Carcinoma Nasofaríngeo/metabolismo , Neoplasias Nasofaríngeas/metabolismo , Radiossensibilizantes/farmacologia , Ribavirina/farmacologia , Fatores de Transcrição da Família Snail/metabolismo , Ensaios Antitumorais Modelo de XenoenxertoRESUMO
Neurosurgical operations are long and intensive medical procedures, during which the surgeon must constantly have an unobscured view of the brain in order to be able to properly operate, and thus must use a variety of tools to clear obstructions (like blood and fluid) from the operating area. Currently, cotton balls are the most versatile and effective option to accomplish this as they absorb fluids, are soft enough to safely manipulate the brain, act as a barrier between other tools and the brain, and function as a spacer to keep anatomies of the brain open and visible during the operation. While cotton balls allow neurosurgeons to effectively improve visibility of the operating area, they may also be accidentally left in the brain upon completion of the surgery. This can lead to a wide range of post-operative risks including dangerous immune responses, additional medical care or surgical operations, and even death. This project seeks to develop a unique medical device that utilizes ultrasound technology in order to minimize cotton retention after neurosurgical procedures in order to reduce undesired post-operative risks, and maximize visibility.
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Cotton balls are used in neurosurgical procedures to assist with hemostasis and improve vision within the operative field. Although the surgeon can reshape pieces of cotton for multiple intraoperative uses, this customizability and scale also places them at perpetual risk of being lost, as blood-soaked cotton balls are visually similar to raw brain tissue. Retained surgical cotton can induce potentially life-threatening immunologic responses, impair postoperative imaging, lead to a textiloma or misdiagnosis, and/or require reoperation. This study investigated three imaging modalities (optical, acoustic, and radiographic) to find the most effective method of identifying foreign bodies during neurosurgery. First, we examined the use of dyes to increase contrast between cotton and surrounding parenchyma (optical approach). Second, we explored the ability to distinguish surgical cotton on or below the tissue surface from brain parenchyma using ultrasound imaging (acoustic approach). Lastly, we analyzed the ability of radiography to differentiate between brain parenchyma and cotton. Our preliminary testing demonstrated that dark-colored cotton is significantly more identifiable than white cotton on the surface level. Additional testing revealed that cotton has noticeable different acoustic characteristics (eg, speed of sound, absorption) from neural tissue, allowing for enhanced contrast in applied ultrasound imaging. Radiography, however, did not present sufficient contrast, demanding further examination. These solutions have the potential to significantly reduce the possibility of intraoperative cotton retention both on and below the surface of the brain, while still providing surgeons with traditional cotton material properties without affecting the surgical workflow.
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The growing cost of medical care worldwide, particularly in oncology, has incentivized researchers and physicians to repurpose clinically used drugs to alleviate the financial burden of drug development and offer potential new therapeutics. Recent works have demonstrated anticancer properties of the FDA-approved drug ribavirin, a synthetic guanosine analogue and antiviral molecule used over the past four decades for the treatment of hepatitis C. The efficacy of ribavirin in cancer has been explored through several preclinical models and ongoing clinical trials in multiple cancers, including acute myeloid leukemia, oropharyngeal squamous cell carcinoma, and metastatic breast cancer. In this review, we summarize the role of ribavirin as an antiviral medication and focus our attention on its recent use as an antitumoral agent. We highlight current knowledge of the potential use and mechanisms of action of ribavirin in cancer. Because current therapeutics for patients with cancer still fail to cure, introducing new forms of treatment is essential. Converging evidence suggests that ribavirin represents a promising addition to a generation of newly repurposed safe and effective anticancer agents.
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Antineoplásicos/uso terapêutico , Neoplasias/tratamento farmacológico , Ribavirina/uso terapêutico , Antineoplásicos/farmacologia , Humanos , Ribavirina/farmacologiaRESUMO
The immunosuppressive effects of chemotherapy present a challenge for designing effective cancer immunotherapy strategies. We hypothesized that although systemic chemotherapy (SC) exhibits negative immunologic effects, local chemotherapy (LC) can potentiate an antitumor immune response. We show that LC combined with anti-programmed cell death protein 1 (PD-1) facilitates an antitumor immune response and improves survival (P < 0.001) in glioblastoma. LC-treated mice had increased infiltration of tumor-associated dendritic cells and clonal expansion of antigen-specific T effector cells. In comparison, SC resulted in systemic and intratumoral lymphodepletion, with decreased immune memory in long-term survivors. Furthermore, adoptive transfer of CD8+ cells from LC-treated mice partially rescued SC-treated mice after tumor rechallenge. Last, the timing of chemo- and immunotherapy had differential effects on anti-PD-1 efficacy. This study suggests that both mode of delivery and timing have distinct effects on the efficacy of anti-PD-1. The results of this work could help guide the selection and scheduling of combination treatment for patients with glioblastoma and other tumor types.
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Anticorpos Monoclonais/farmacologia , Anticorpos Antineoplásicos/farmacologia , Antineoplásicos/farmacologia , Neoplasias Encefálicas/tratamento farmacológico , Glioblastoma/tratamento farmacológico , Receptor de Morte Celular Programada 1/imunologia , Animais , Carmustina/farmacologia , Linhagem Celular Tumoral , Modelos Animais de Doenças , Progressão da Doença , Feminino , Citometria de Fluxo , Glioma/tratamento farmacológico , Humanos , Imunossupressores/farmacologia , Imunoterapia , Camundongos , Camundongos Endogâmicos C57BL , Microglia/metabolismo , Resultado do TratamentoRESUMO
BACKGROUND AND IMPORTANCE: Giant cell tumors (GCTs) are rare primary bone neoplasms. The best long-term prognosis is achieved via complete tumor excision, but this feat is challenging in the spine due to proximity of blood vessels and nervous tissue. When occurring in the sacrum, GCTs have been removed in an en bloc fashion via combined anterior/posterior approaches, oftentimes with nerve root sacrifice. The purpose of this article is to present a case of a single-staged, posterior-only approach for en bloc resection of a sacral GCT without nerve root sacrifice. CLINICAL PRESENTATION: A 45-year-old female presented with intractable lower back and leg pain, saddle anesthesia, and lower extremity weakness. She underwent imaging studies, which revealed a lesion involving the S1 and S2 vertebral bodies. Computed tomography guided biopsy revealed the lesion to be a GCT. The patient underwent a posterior-only approach without nerve root sacrifice to achieve an en bloc resection, followed by lumbopelvic reconstruction. CONCLUSION: Sacrectomy via a single-staged posterior approach with nerve root preservation is a challenging yet feasible procedure for the treatment of giant cell tumors in carefully selected patients.
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Tumor de Células Gigantes do Osso/cirurgia , Procedimentos Neurocirúrgicos/métodos , Sacro/cirurgia , Neoplasias da Coluna Vertebral/cirurgia , Raízes Nervosas Espinhais/cirurgia , Artrodese/métodos , Feminino , Tumor de Células Gigantes do Osso/complicações , Humanos , Dor Lombar/etiologia , Pessoa de Meia-Idade , Debilidade Muscular/etiologia , Dor Intratável/etiologia , Decúbito Ventral , Neoplasias da Coluna Vertebral/complicações , Tomografia Computadorizada por Raios X , Resultado do TratamentoRESUMO
BACKGROUND AND IMPORTANCE: Occurrence of spinal epithelioid sarcomas is rare, with few cases reported in the literature. Although wide local resection is the recommended treatment, this technique is challenging in the spine. CLINICAL PRESENTATION: The case of a 17-year-old male with a recurrent epithelioid sarcoma with intradural extension in the cervical spine is presented. Because of nerve root involvement, the patient presented with right upper extremity weakness. The patient underwent a posterior C1-C4 spondylectomy to achieve an en bloc resection, followed by reconstruction from the occiput to T4. The right vertebral artery and C1-C4 nerve roots were sacrificed because of tumor involvement. After 3 years of follow-up the patient is disease-free but has persistent right deltoid weakness. CONCLUSION: Cervical spondylectomy via a single-staged posterior approach is a challenging yet feasible procedure for the treatment of epithelioid sarcomas. To the best of the authors' knowledge, this is the first report of complete resection of an epithelioid sarcoma with intradural extension in the cervical spine. Although neurovascular structures may warrant sacrifice, this procedure may provide improved long-term prognosis.
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BACKGROUND AND IMPORTANCE: Primary tumors of the spine are considered for en bloc resection to improve local control and even obtain cure. Anatomic restrictions often prohibit extensive resections with negative margins that are safe and feasible. We report the first case involving a patient with a large chordoma of the thoracic spine who underwent a successful 5-level spondylectomy with bilateral chest wall resection for en bloc resection without neurologic compromise. CLINICAL PRESENTATION: A 26-year-old woman with a chest mass was found to have a T1-5 chordoma via a percutaneous biopsy. En bloc resection of the mass was thought to be the best option for long-term local control and possible cure. She presented without neurologic or pulmonary dysfunction. The patient underwent a 3-stage procedure. The first stage involved a posterior C2-T8 exposure, allowing release of posterior elements from C7 to T6 and instrumented stabilization from C2 to T8. T1-5 ribs were cut bilaterally, and 2 wire saws were placed ventral to the thecal sac at the C7-T1 and T5-6 disc levels. The second stage involved a right-sided thoracotomy, and the T5-6 wire saw was used to complete the lower osteotomy. The third stage involved completion of the C7-T1 osteotomy with the wire saw, delivery of the tumor specimen en bloc, ventral reconstruction of the spine with a titanium mesh cage, and bilateral thoracoplasty. CONCLUSION: This is the first case report of a 5-level spondylectomy for en bloc resection of an extensive thoracic chordoma via a bilateral thoractomy without neurologic compromise.
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Cordoma/cirurgia , Procedimentos Neurocirúrgicos/métodos , Procedimentos Ortopédicos/métodos , Neoplasias da Coluna Vertebral/cirurgia , Vértebras Torácicas/cirurgia , Feminino , Humanos , Parede Torácica/cirurgia , Toracotomia/métodos , Adulto JovemRESUMO
BACKGROUND: En bloc resection of spinal and sacral chordomas may convey a survival benefit. However, these procedures often are complex and require the surgeon to plan a procedure that results in negative tumor margins, protects vital neurovascular structures, and concludes with a viable biomechanical reconstruction. OBJECTIVE: We present a case of a 3-level en bloc lumbar spondylectomy and reconstruction. METHODS: A case of a 45-year-old woman with biopsy-proven exophytic L4 chordoma is presented. The patient underwent successful L3-L5 en bloc spondylectomy and reconstruction over 3 stages. RESULTS: The patient did well following the procedure, and was neurologically intact at 6-week follow-up. CONCLUSION: Three-level en bloc spondylectomy with lumbopelvic reconstruction is a challenging yet feasible procedure.
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Cordoma/cirurgia , Sacro/cirurgia , Neoplasias da Coluna Vertebral/cirurgia , Biópsia , Cordoma/patologia , Feminino , Seguimentos , Humanos , Vértebras Lombares/cirurgia , Pessoa de Meia-Idade , Procedimentos de Cirurgia Plástica , Sacro/patologia , Neoplasias da Coluna Vertebral/patologia , Resultado do TratamentoRESUMO
BACKGROUND: Pedicle screws are used to stabilize all 3 columns of the spine, but can be technically demanding to place. Although intraoperative fluoroscopy and stereotactic-guided techniques slightly increase placement accuracy, they are also associated with increased radiation exposure to patient and surgeon as well as increased operative time. OBJECTIVE: To describe and critically evaluate our 7-year institutional experience with placement of pedicle screws in the thoracic and lumbar spine using a free-hand technique. METHODS: We retrospectively reviewed records of all patients undergoing free-hand pedicle screw placement without fluoroscopy in the thoracic or lumbar spine between June 2002 and June 2009. Incidence and extent of cortical breach by misplaced pedicle screw was determined by review of postoperative computed tomography scans. We defined breach as more than 25% of the screw diameter residing outside of the pedicle or vertebral body cortex. RESULTS: A total of 964 patients received 6816 free-hand placed pedicle screws in the thoracic or lumbar spine. Indications for hardware placement were degenerative/deformity disease (51.2%), spondylolisthesis (23.7%), tumor (22.7%), trauma (11.3%), infection (7.6%), and congenital (0.9%). A total of 115 screws (1.7%) were identified as breaching the pedicle in 87 patients (9.0%). Breach occurred more frequently in the thoracic than the lumbar spine (2.5% and 0.9%, respectively; P < .0001) and was more often lateral (61.3%) than medial (32.8%) or superior (2.5%). T4 (4.1%) and T6 (4.0%) experienced the highest breach rate, whereas L5 and S1 had the lowest breach rate. Eight patients (0.8%) underwent revision surgery to correct malpositioned screws. CONCLUSION: Free-hand pedicle screw placement based on external anatomy alone can be performed with acceptable safety and accuracy and allows avoidance of radiation exposure encountered in fluoroscopic techniques. Image-guided assistance may be most valuable when placing screws between T4 and T6, where breach rates are highest.
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Parafusos Ósseos , Procedimentos Ortopédicos/métodos , Fusão Vertebral/métodos , Feminino , Humanos , Vértebras Lombares , Masculino , Pessoa de Meia-Idade , Procedimentos Ortopédicos/instrumentação , Estudos Retrospectivos , Fusão Vertebral/instrumentação , Vértebras TorácicasRESUMO
BACKGROUND: Primary sacral neoplasms that extend superiorly to involve the distal lumbar spine represent complex surgical problems. Treatment options for these patients are often limited to hemicorporectomy. OBJECTIVE: To detail our surgical technique for en bloc resection of a sarcoma involving the L5 vertebral segment and sacrum and the reconstruction of the lumbopelvic junction. METHODS: A 52-year-old woman presented with intractable pain secondary to a sarcoma involving the L5 vertebral segment and sacrum. She underwent a combined L5 spondylectomy and total sacrectomy for en bloc resection of her neoplasm. A novel lumbopelvic reconstruction technique was used to establish a liaison between the lumbar spine and pelvis. RESULTS: Operative complications included a venous vascular injury and a nonviable myocutaneous flap. Postoperatively, the patient had complete resolution of her pain. Unfortunately, the patient developed metastatic disease and died 5 months after her initial surgical procedure. CONCLUSION: We describe a patient who underwent a combined L5 spondylectomy and total sacrectomy for en bloc resection of a lumbosacral sarcoma. Additionally, we report a novel technique to reconstruct the lumbopelvic junction. The operative procedures are detailed with the aid of radiographs, intraoperative photographs, and illustrations.
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Histiocitoma Fibroso Maligno/cirurgia , Região Lombossacral/cirurgia , Pelve/cirurgia , Procedimentos de Cirurgia Plástica , Neoplasias da Coluna Vertebral/cirurgia , Coluna Vertebral/cirurgia , Evolução Fatal , Feminino , Histiocitoma Fibroso Maligno/patologia , Humanos , Imageamento por Ressonância Magnética , Pessoa de Meia-Idade , Metástase Neoplásica , Procedimentos Ortopédicos/métodos , Dor Intratável/etiologia , Complicações Pós-Operatórias , Período Pós-Operatório , Neoplasias da Coluna Vertebral/patologia , Tomografia Computadorizada por Raios XRESUMO
BACKGROUND: Occipitocervical instability with vertical migration of the odontoid is a rare but potentially debilitating anomaly of the craniocervical junction. Anterior decompression by means of a transoral or transcervical approach followed by posterior instrumentation commonly is used to treat this pathology. OBJECTIVE: To develop an innovative operative technique to correct reducible occipitocervical instability using a purely posterior approach. CLINICAL PRESENTATION: Two patients presented to our institution with occipitocervical instability. One patient developed vertical migration of the odontoid secondary to a retropharyngeal abscess after radiation treatment. The second patient developed occipitocervical instability as a result of pathological destruction of C2 from a breast metastasis. Both patients were myelopathic with severe neck pain. TECHNIQUE: Both patients were brought to the operating room for intraoperative reduction and fixation using a purely posterior approach. This new technique obviated the need for an anterior decompression procedure or preoperative halo reduction. Postoperatively, both patients had excellent restoration of spinal alignment as well as improvement in both pain and myelopathy. CONCLUSION: We achieved intraoperative reduction of occipitocervical instability through a purely posterior approach. This technique adds a tool to the armamentarium of techniques used for the treatment of occipitocervical instability.
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Articulação Atlantoaxial/cirurgia , Articulação Atlantoccipital/cirurgia , Descompressão Cirúrgica/métodos , Instabilidade Articular/cirurgia , Compressão da Medula Espinal/cirurgia , Fusão Vertebral/métodos , Idoso , Articulação Atlantoaxial/diagnóstico por imagem , Articulação Atlantoaxial/patologia , Articulação Atlantoccipital/diagnóstico por imagem , Articulação Atlantoccipital/patologia , Neoplasias da Mama/patologia , Carcinoma/complicações , Carcinoma/secundário , Descompressão Cirúrgica/instrumentação , Feminino , Humanos , Fixadores Internos , Instabilidade Articular/diagnóstico por imagem , Instabilidade Articular/patologia , Masculino , Processo Odontoide/diagnóstico por imagem , Processo Odontoide/patologia , Processo Odontoide/cirurgia , Lesões por Radiação/complicações , Lesões por Radiação/patologia , Radiografia , Abscesso Retrofaríngeo/complicações , Abscesso Retrofaríngeo/patologia , Compressão da Medula Espinal/patologia , Compressão da Medula Espinal/fisiopatologia , Fusão Vertebral/instrumentação , Neoplasias da Coluna Vertebral/complicações , Neoplasias da Coluna Vertebral/secundárioRESUMO
BACKGROUND: En bloc resection, with adequate surgical margins, of primary malignant bone tumors of the sacrum is associated with long term disease control and potential cure. Resection of sacral tumors is difficult due to the proximity of neurovascular and visceral structures, and complete, or even partial, sacrectomy often results in functional loss for the patient. OBJECTIVE: We describe the technique for en bloc resection of a sacral chordoma through a mid-sacral amputation. RESULTS: We demonstrate successful removal of a large sacral tumor with wide surgical margins while preserving neurologic function. CONCLUSION: This technique for midsacral amputation to remove a sacral tumor en bloc minimizes local recurrence and maximizes neurovascular function.
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Amputação Cirúrgica/métodos , Cordoma/cirurgia , Procedimentos Neurocirúrgicos/métodos , Sacro/cirurgia , Neoplasias da Coluna Vertebral/cirurgia , Cordoma/patologia , Humanos , Recidiva Local de Neoplasia/prevenção & controle , Polirradiculopatia/etiologia , Polirradiculopatia/fisiopatologia , Polirradiculopatia/prevenção & controle , Complicações Pós-Operatórias/etiologia , Complicações Pós-Operatórias/prevenção & controle , Procedimentos de Cirurgia Plástica , Sacro/patologia , Neoplasias da Coluna Vertebral/patologia , Raízes Nervosas Espinhais/anatomia & histologia , Raízes Nervosas Espinhais/cirurgia , Resultado do TratamentoRESUMO
STUDY DESIGN: This illustrative case report is designed to provide technical data regarding the use of a posterior approach to resect a retropharyngeal chordoma involving the craniovertebral junction. OBJECTIVE: The objective of this report is to emphasize the utility of the posterior approach when treating anterior tumors of the craniovertebral junction. SUMMARY OF BACKGROUND DATA: Traditionally, a transoral transpharyngeal or extended anterior approach was used to resect anterior tumors of the craniovertebral junction. These approaches have several limitations unique to these exposures, limitations not applicable to a posterior midline cervical approach. METHODS: A case report is provided that illustrates the use of a posterior cervical approach used to resect a retropharyngeal craniovertebral junction chordoma. RESULTS: Gross total resection of a retropharyngeal chordoma was achieved using a posterior cervical approach. Although local tumor recurrence did occur, this was resected and adjuvant radiotherapy prescribed. This resulted in an ongoing 4-year recurrence free survival. CONCLUSIONS: The posterior cervical midline exposure could be used to dissect and remove anterior retropharyngeal tumors, with minimal morbidity.
Assuntos
Articulação Atlantoaxial/cirurgia , Vértebra Cervical Áxis/cirurgia , Atlas Cervical/cirurgia , Cordoma/cirurgia , Procedimentos Neurocirúrgicos/métodos , Neoplasias da Coluna Vertebral/cirurgia , Idoso de 80 Anos ou mais , Articulação Atlantoaxial/diagnóstico por imagem , Articulação Atlantoaxial/patologia , Vértebra Cervical Áxis/diagnóstico por imagem , Vértebra Cervical Áxis/patologia , Atlas Cervical/diagnóstico por imagem , Atlas Cervical/patologia , Cordoma/diagnóstico por imagem , Cordoma/patologia , Humanos , Laminectomia/métodos , Masculino , Procedimentos Neurocirúrgicos/instrumentação , Radiografia , Fusão Vertebral/instrumentação , Fusão Vertebral/métodos , Neoplasias da Coluna Vertebral/diagnóstico por imagem , Neoplasias da Coluna Vertebral/patologia , Resultado do TratamentoRESUMO
MALIGNANT PRIMARY SPINAL tumors are rare tumors that are locally invasive and can metastasize. The majority of these tumors have a poor response rate to chemotherapy and conventional radiotherapy. Studies have shown that long-term survival and the potential for cure is best achieved with en bloc surgical excision of these tumors with negative surgical margins. Total en bloc spondylectomy involves removal of vertebral segment(s) in whole to achieve wide tumor excision. Total en bloc spondylectomy can be performed through staged or combined anterior and posterior approaches, or from a posterior-only approach. The posterior-only approach offers the advantage of achieving complete tumor excision and circumferential spinal reconstruction in a single setting. In this report, we discuss the operative management of malignant primary vertebral tumors using the posterior-only approach for total en bloc spondylectomy. The oncological considerations and surgical nuances that allow for safe but aggressive surgical excision of primary spinal tumors to achieve favorable oncological and neurological outcomes are highlighted.