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1.
Support Care Cancer ; 32(4): 234, 2024 Mar 19.
Artigo em Inglês | MEDLINE | ID: mdl-38502353

RESUMO

PURPOSE: Culturally and linguistically diverse (CALD) cancer patients report unmet informational and emotional needs when receiving radiotherapy (RT). This feasibility study aimed to evaluate the clinical use of an instant translation device (ITD) to facilitate communication between Mandarin-speaking patients and radiation therapists (RTTs) within the Australian public RT setting. The primary aim was to assess the ability to convey information relating to daily patient care and build rapport using the device. METHODS: A single-arm prospective interventional trial was employed with patient and RTT participants. Eligible patient participants were aged 18 years or older, diagnosed with cancer, referred for RT with self-reported Mandarin as the primary language spoken at home. Patients who had previously received RT were excluded. Consenting patient participants completed a baseline assessment of health literacy (REALM-SF) and English proficiency (LexTALE). Surveys were administered to patients and consenting RTTs at the cessation of treatment, forming two distinct participant groups. Descriptive statistics were used to compare participant groups. RESULTS: Eleven patients and 36 RTTs were recruited to the study. Descriptive statistics demonstrated participant group agreement in conveying treatment instructions, though differing experiences were reported against general conversation. Although the reporting of technical difficulties was inconsistent, both groups recommended the application of the ITD within the RT domain. CONCLUSION: This feasibility study demonstrated encouraging accounts of patients and RTTs with regard to ITD use in the context of RT treatment. Expanded, multi-institutional recruitment is required to yield statistical significance, inform the impact of the device, and determine requisite training requirements. TRIAL REGISTRATION: HREC reference number: LNR/18/PMCC/115 (18/100L). HREC approval date: 10 July 2018.


Assuntos
Comunicação , Neoplasias , Humanos , Austrália , Idioma , Neoplasias/radioterapia , Neoplasias/psicologia , Estudos Prospectivos
2.
BMC Med Educ ; 23(1): 544, 2023 Jul 31.
Artigo em Inglês | MEDLINE | ID: mdl-37525150

RESUMO

BACKGROUND: Improving oncology-specific knowledge and skills of healthcare professionals is critical for improving the outcomes of people with cancer. Many current postgraduate education offerings may be inaccessible to busy professionals, contain minimal consumer input or do not focus on the multidisciplinary nature of cancer care. In response to these needs, a Master of Cancer Sciences degree was developed. Our aim is to describe the development of the Master of Cancer Sciences. METHODS: We describe the development of the Master of Cancer Sciences, including its theoretical and its pedagogical underpinnings. RESULTS: Our approach to curriculum design was guided by Kern's Six-Step Approach to Medical Curriculum and underpinned by the Seven Principles of Online Learning. These approaches were further underpinned by the Cognitive Theory of Multimedia Learning which informed our approach to audio and visual information design. The pedagogy is interactive, experiential, interprofessional and importantly, includes consumers as educators. In practice, learning activities include peer feedback, multidisciplinary team meeting simulations, group work and clinical role plays. The online environment was visually shaped through infographics, high-quality educational videos and gamification. CONCLUSION: We have designed a Master of Cancer Sciences that is one of the first wholly online, cancer-specific Masters' programs. Its industry-led curriculum using evidence-based pedagogical choices utilises a range of novel digital formats and integrates the consumer perspective to provide a holistic overview of the field. Quantitative and qualitative evaluation of learning outcomes is ongoing.


Assuntos
Currículo , Neoplasias , Humanos , Aprendizagem , Retroalimentação , Estudos Interdisciplinares , Pessoal de Saúde
3.
Artigo em Inglês | MEDLINE | ID: mdl-37274094

RESUMO

Introduction: Clear, timely communication between practitioners and patients is key in ensuring equitable access to health services and optimal care. Australia's linguistically diverse population adds complexity to healthcare provision. This paper describes a validation study to assess clinical suitability of a language translation device, intended for use with Mandarin speaking patients undergoing radiotherapy (RT). Materials and methods: After a comprehensive device selection process, common phrases used in RT practice were curated within one clinical center and translated by interpreters. Phrases were categorized by conversation type and readability (according to Flesch-Kincaid and FORCAST scores). Validation of device performance was undertaken by purposely selected radiation therapists (RTTs) who tested and evaluated the device using a survey with 5-point Likert scale responses. Statistical analysis was undertaken on Excel using Pearson's chi-square, z-test, interrater reliability/agreement and linear regression analyses. Results: Six RTTs and two interpreters volunteered to participate in this study. 188 common phrases were spoken verbatim into the device and scored on a 5-point Likert scale, yielding an overall output accuracy of 66%. A z-test confirmed significance against prior comparative research and Linear regression analysis observed improved output between consecutive participants. 62.7% of interpreter scores were identical; a further 29.1% constituted a single point scoring variation. Poorer outcomes were observed with colloquial English and lower readability. Conclusions: This study found the device produced suitable translation accuracy and identified language styles that should be avoided with use. Further research could consider clinical application, expanded languages and/or health disciplines, and development of a national RTT phrase list.

4.
BMC Cancer ; 23(1): 30, 2023 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-36611133

RESUMO

BACKGROUND: Merkel cell carcinoma (MCC) is a rare but highly aggressive neuroendocrine skin malignancy, with Australia having the highest reported incidence in the world. There is currently a lack of consensus regarding optimal management of this disease. METHODS: This was a retrospective audit conducted by reviewing existing medical records of MCC patients presenting to the Peter MacCallum Cancer Centre (PMCC) between 1980 and 2018. The primary endpoint was locoregional recurrence. The secondary endpoints were distant recurrence, disease-free survival (DFS) and overall survival (OS). RESULTS: A total of 533 patients were identified. Locoregional recurrence occurring at one, two and 5 years was 24, 31 and 32%, respectively. The estimated 5-year OS and DFS were 46% (95% Confidence Interval [CI] 41-51%) and 34% (95% CI 30-39%) respectively. Older age at diagnosis (hazard ratio [HR] per year = 1.07, 95% CI 1.06-1.07, p < 0.001), and larger primary tumour diameter (HR =1.16, 95% CI 1.03-1.31, p = 0.019) were associated with worse OS on multivariable analysis. Positive or negative histopathological margin status was not associated with OS or DFS differences in patients treated with post-operative radiotherapy. CONCLUSIONS: In our study, about a third of patients developed locoregional recurrence, distal recurrence or both, and there appears to be no change over the last four decades. If treated with adjuvant radiotherapy, there is no difference in OS or DFS with positive surgical margins. Findings should influence future guidelines.


Assuntos
Carcinoma de Célula de Merkel , Neoplasias Cutâneas , Humanos , Carcinoma de Célula de Merkel/epidemiologia , Carcinoma de Célula de Merkel/terapia , Estudos Retrospectivos , Recidiva Local de Neoplasia/epidemiologia , Recidiva Local de Neoplasia/radioterapia , Neoplasias Cutâneas/epidemiologia , Neoplasias Cutâneas/terapia , Neoplasias Cutâneas/patologia , Radioterapia Adjuvante
5.
Artigo em Inglês | MEDLINE | ID: mdl-36324858

RESUMO

The field of radiation oncology is rapidly advancing through technological and biomedical innovation backed by robust research evidence. In addition, cancer professionals are notoriously time-poor, meaning there is a need for high quality, accessible and tailored oncological education programs. Digital learning (DL) is well-placed to cater to these needs, as it provides teaching options that can be delivered flexibly and on-demand from anywhere in the world. The evidence for usage of these techniques in medical education has expanded rapidly in recent years. However, there remains many reservations in the oncological community to adopting and developing DL, largely due to a poor familiarity with the pedagogical evidence base. This article will review the application of the screen-based DL tools that are at educators' disposal. It will summarize best-practice in developing tailored, made-for-screen videos, gamification, and infographics. It also reviews data behind the following practical tips of 1) strategically combining text with graphics to decrease cognitive load, 2) engaging users through use of interactive elements in digital content, and 3) maximizing impact through thoughtful organization of animations/images. Overall, the digital space evolving is well placed to cater to the evolving educational needs of oncology learners. This review and its practical tips aim to inspire further development in this arena, production of high-yield educational products, use of engaging delivery methods and programs that are tailored to individual learning needs.

6.
Artigo em Inglês | MEDLINE | ID: mdl-36164438

RESUMO

The field of radiation oncology is rapidly advancing through technological and biomedical innovation backed by robust research evidence. However, cancer professionals are notoriously time-poor, meaning there is a need for high quality, accessible and tailored oncologic education programs. While traditional teaching methods including lectures and other in-person delivery formats remain important, digital learning (DL) has provided additional teaching options that can be delivered flexibly and on-demand from anywhere in the world. While evidence of this digital migration has been evident for some time now, it has not always been met with the same enthusiasm by the teaching community, in part due to questions about its pedagogical effectiveness. Many of these reservations have been driven by a rudimentary utilisation of the medium and inexperience with digital best-practice. With increasing familiarity and understanding of the medium, increasingly sophisticated and pedagogically-driven learning solutions can be produced. This article will review the application of immersive digital learning tools in radiation oncology education. This includes first and second-generation Virtual Reality (VR) environments and Augmented Reality (AR). It will explore the data behind, and best-practice application of, each of these tools as well as giving practical tips for educators who are looking to implement (or refine) their use of these learning methods. It includes a discussion of how to match the digital learning methods to the content being taught and ends with a horizon scan of where the digital medium may take us in the future. This article is the second in a two-part series, with the companion piece being on Screen-Based Digital Learning Methods in Radiation Oncology. Overall, the digital space is well-placed to cater to the evolving educational needs of oncology learners. Further uptake over the next decade is likely to be driven by the desire for flexible on demand delivery, high-yield products, engaging delivery methods and programs that are tailored to individual learning needs. Educational programs that embrace these principles will have unique opportunities to thrive in this space.

7.
Int J Mol Sci ; 23(14)2022 Jul 20.
Artigo em Inglês | MEDLINE | ID: mdl-35887332

RESUMO

Extracellular vesicles (EVs) are minute vesicles with lipid bilayer membranes. EVs are secreted by cells for intercellular communication. Recently, EVs have received much attention, as they are rich in biological components such as nucleic acids, lipids, and proteins that play essential roles in tissue regeneration and disease modification. In addition, EVs can be developed as vaccines against cancer and infectious diseases, as the vesicle membrane has an abundance of antigenic determinants and virulent factors. EVs for therapeutic applications are typically collected from conditioned media of cultured cells. However, the number of EVs secreted by the cells is limited. Thus, it is critical to devise new strategies for the large-scale production of EVs. Here, we discussed the strategies utilized by researchers for the scalable production of EVs. Techniques such as bioreactors, mechanical stimulation, electrical stimulation, thermal stimulation, magnetic field stimulation, topographic clue, hypoxia, serum deprivation, pH modification, exposure to small molecules, exposure to nanoparticles, increasing the intracellular calcium concentration, and genetic modification have been used to improve the secretion of EVs by cultured cells. In addition, nitrogen cavitation, porous membrane extrusion, and sonication have been utilized to prepare EV-mimetic nanovesicles that share many characteristics with naturally secreted EVs. Apart from inducing EV production, these upscaling interventions have also been reported to modify the EVs' cargo and thus their functionality and therapeutic potential. In summary, it is imperative to identify a reliable upscaling technique that can produce large quantities of EVs consistently. Ideally, the produced EVs should also possess cargo with improved therapeutic potential.


Assuntos
Vesículas Extracelulares , Reatores Biológicos , Linhagem Celular , Células Cultivadas , Meios de Cultivo Condicionados/metabolismo , Vesículas Extracelulares/metabolismo
9.
Melanoma Res ; 32(3): 166-172, 2022 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-35256569

RESUMO

Melanoma remains a large global burden with a significant proportion of patients succumbing to metastatic disease. The adrenal gland is a common area for metastasis with surgical treatment as the main modality. Radiotherapy is less utilised in this setting with uncertainty over deliverability and efficacy. Here, we present the details and outcomes of 20 patients treated with radiotherapy, with or without systemic therapy, for melanoma adrenal metastasis in a single institute. Twenty patients were identified from radiation treatment and medical records from between 2015 and 2019 at our institution. Three patients had bilateral radiotherapy treatments and therefore 23 adrenal lesions were analysed. Demographics, indications for treatment, radiotherapy methodology and outcomes were recorded. Outcomes were based on serial 18F FDG PET/computerized tomography scans reporting using the PERCIST criteria. The most common indication for radiotherapy was oligo-progressive disease (70%) followed by symptom palliation. Eight (35%) of the treatments were delivered by stereotactic ablative body radiotherapy. Twelve (60%) patients had concurrent immunotherapy. Twenty of twenty-three (87%) adrenal lesions had an initial response to treatment with 12 (60%) maintaining local control until death or end of follow-up. Median adrenal-specific progression-free survival was 13 months. Four patients (17%) required salvage adrenalectomy. Symptom palliation was achieved in the majority of patients for which it was indicated and there were no grade three toxicities. The median time from radiotherapy to change of immunotherapy treatment was 4 months. Radiotherapy for melanoma adrenal metastasis is effective and deliverable. With the majority of patients achieving a palliative and clinically relevant durable response, adrenalectomy can be reserved as a salvage option.


Assuntos
Neoplasias das Glândulas Suprarrenais , Melanoma , Radiocirurgia , Neoplasias Cutâneas , Neoplasias das Glândulas Suprarrenais/patologia , Neoplasias das Glândulas Suprarrenais/radioterapia , Neoplasias das Glândulas Suprarrenais/secundário , Humanos , Melanoma/cirurgia , Intervalo Livre de Progressão , Radiocirurgia/métodos , Estudos Retrospectivos , Neoplasias Cutâneas/cirurgia
10.
J Med Imaging Radiat Oncol ; 66(5): 678-687, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35106919

RESUMO

INTRODUCTION: To describe the pattern of the use of advanced radiation therapy (RT) techniques, including intensity-modulated RT (IMRT), volumetric modulated arc therapy (VMAT), and stereotactic body RT (SBRT) for the management of bone metastases (BM), and the associated factors in Victoria. METHODS: We used a population-based cohort of patients from the state-wide Victorian Radiotherapy Minimum Data Set (VRMDS) who received RT for BM between 2012 and 2017. The primary outcome was proportion of RT courses using advanced RT techniques. The Cochran-Armitage test for trend was used to evaluate temporal trend in advanced RT use. Multinomial logistic regression was used to identify factors associated with advanced RT use. RESULTS: A total of 18,158 courses of RT were delivered to 10,956 patients-16,626 (91.6%) courses were 3D conformal RT, 857 (4.7%) IMRT/VMAT and 675 (3.7%) SBRT. There was a sharp increase in IMRT/VMAT use from <1% in 2012-2015, to 10.1% in 2016 and 16.3% in 2017 (P-trend < 0.001). Increase in SBRT use was more gradual, from 1.2% in 2012 to 4.8% in 2016 and 5.5% in 2017 for SBRT (P-trend<0.001). In multivariate analyses, year of RT was the strongest predictor of IMRT/VMAT use (OR = 41; 95%CI = 25-67; P < 0.001, comparing 2012-2013 and 2016-2017). Primary tumour type (prostate cancer) was the strongest predictor of SBRT use (OR = 6.07; 95% CI = 4.19-8.80; P < 0.001). CONCLUSION: Overall, there was increasing trend in the use of advanced RT techniques for BM in Victoria, with a distinct pattern for IMRT/VMAT compared with SBRT - SBRT uptake was more gradual while IMRT/VMAT uptake was abrupt, occurring contemporaneously with Medicare Benefit Scheme funding changes in 2016.


Assuntos
Radiocirurgia , Radioterapia de Intensidade Modulada , Neoplasias da Coluna Vertebral , Idoso , Humanos , Masculino , Medicare , Radiocirurgia/métodos , Dosagem Radioterapêutica , Planejamento da Radioterapia Assistida por Computador/métodos , Radioterapia de Intensidade Modulada/métodos , Neoplasias da Coluna Vertebral/radioterapia , Estados Unidos
12.
J Immunother Cancer ; 9(10)2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34625515

RESUMO

BACKGROUND: Melanoma brain metastases (MBMs) are a challenging clinical problem with high morbidity and mortality. Although first-line dabrafenib-trametinib and ipilimumab-nivolumab have similar intracranial response rates (50%-55%), central nervous system (CNS) resistance to BRAF-MEK inhibitors (BRAF-MEKi) usually occurs around 6 months, and durable responses are only seen with combination immunotherapy. We sought to investigate the utility of ipilimumab-nivolumab after MBM progression on BRAF-MEKi and identify mechanisms of resistance. METHODS: Patients who received first-line ipilimumab-nivolumab for MBMs or second/third line ipilimumab-nivolumab for intracranial metastases with BRAFV600 mutations with prior progression on BRAF-MEKi and MRI brain staging from March 1, 2015 to June 30, 2018 were included. Modified intracranial RECIST was used to assess response. Formalin-fixed paraffin-embedded samples of BRAFV600 mutant MBMs that were naïve to systemic treatment (n=18) or excised after progression on BRAF-MEKi (n=14) underwent whole transcriptome sequencing. Comparative analyses of MBMs naïve to systemic treatment versus BRAF-MEKi progression were performed. RESULTS: Twenty-five and 30 patients who received first and second/third line ipilimumab-nivolumab, were included respectively. Median sum of MBM diameters was 13 and 20.5 mm for the first and second/third line ipilimumab-nivolumab groups, respectively. Intracranial response rate was 75.0% (12/16), and median progression-free survival (PFS) was 41.6 months for first-line ipilimumab-nivolumab. Efficacy of second/third line ipilimumab-nivolumab after BRAF-MEKi progression was poor with an intracranial response rate of 4.8% (1/21) and median PFS of 1.3 months. Given the poor activity of ipilimumab-nivolumab after BRAF-MEKi MBM progression, we performed whole transcriptome sequencing to identify mechanisms of drug resistance. We identified a set of 178 differentially expressed genes (DEGs) between naïve and MBMs with progression on BRAF-MEKi treatment (p value <0.05, false discovery rate (FDR) <0.1). No distinct pathways were identified from gene set enrichment analyses using Kyoto Encyclopedia of Genes and Genomes, Gene Ontogeny or Hallmark libraries; however, enrichment of DEG from the Innate Anti-PD1 Resistance Signature (IPRES) was identified (p value=0.007, FDR=0.03). CONCLUSIONS: Second-line ipilimumab-nivolumab for MBMs after BRAF-MEKi progression has poor activity. MBMs that are resistant to BRAF-MEKi that also conferred resistance to second-line ipilimumab-nivolumab showed enrichment of the IPRES gene signature.


Assuntos
Neoplasias Encefálicas/etiologia , Ipilimumab/uso terapêutico , Melanoma/complicações , Quinases de Proteína Quinase Ativadas por Mitógeno/antagonistas & inibidores , Nivolumabe/uso terapêutico , Receptor de Morte Celular Programada 1/antagonistas & inibidores , Inibidores de Proteínas Quinases/uso terapêutico , Proteínas Proto-Oncogênicas B-raf/antagonistas & inibidores , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias Encefálicas/genética , Feminino , Humanos , Ipilimumab/farmacologia , Masculino , Melanoma/genética , Pessoa de Meia-Idade , Nivolumabe/farmacologia , Inibidores de Proteínas Quinases/farmacologia , Adulto Jovem
13.
Asia Pac J Clin Oncol ; 16(6): 312-319, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32757453

RESUMO

Merkel cell carcinoma (MCC) is a highly aggressive neuroendocrine tumor of the skin with an estimated disease-associated mortality of 15-33%. Australia has a higher incidence of MCC compared to the rest of the world, thought to be due to a higher ultraviolet index. The Australian MCC population is distinct from the MCC population of the Northern hemisphere, characterized by a predominantly viral negative etiology with high tumor mutational burden. The optimal management of MCC and the choice of treatment modality vary significantly across the world and even between institutions within Australia. Historically, the treatment for MCC has been resection followed by radiotherapy (RT), though definitive RT is an alternative treatment used commonly in Australia. The arrival of immune checkpoint inhibitors and the mounting evidence that MCC is a highly immunogenic disease is transforming the treatment landscape for MCC. Australia is playing a key role in the further development of treatment options for MCC with two upcoming Australian/New Zealand investigator-initiated clinical trials that will explore the interplay of RT and immunotherapy in the treatment of early and late stage MCC.


Assuntos
Carcinoma de Célula de Merkel/terapia , Imunoterapia/métodos , Neoplasias Cutâneas/terapia , Austrália , Carcinoma de Célula de Merkel/patologia , Humanos , Neoplasias Cutâneas/patologia
14.
Neuro Oncol ; 22(3): 423-432, 2020 03 05.
Artigo em Inglês | MEDLINE | ID: mdl-31498868

RESUMO

BACKGROUND: Despite classic teaching that intracranial metastases typically arise at the gray-white matter junction, small intracranial melanoma metastases (IMM) are frequently observed at the interface between the cortex and leptomeninges (ie, "corticomeningeal interface"), suggesting possible leptomeningeal origin. METHODS: MRI brain examinations of melanoma patients treated at a specialist oncology center from July 2015 to June 2017 were retrospectively reviewed. The MRI examination on which IMM were first visible was identified, utilizing 1 mm volumetric postcontrast imaging prior to local therapy. Individual metastases (up to 10 per patient) were assessed for the presence of leptomeningeal contact, as well as their number, size, and morphology. Lesions ≥10 mm in long axis were excluded, in order to examine early metastatic disease. RESULTS: Seventy-five patients had evidence of IMM. Fifteen patients had only lesion(s) measuring ≥10 mm at diagnosis, leaving 60 patients. One hundred ninety-two individual metastases were examined (median 2 per patient; interquartile range, 1-4), 174 (91%) demonstrating leptomeningeal contact. A nodular morphology was observed in 154 of 192 (82%), 32 (17%) were ovoid but elongated along the cortex, and 6 (3%) were linear. Only 3 patients (5%) also exhibited a "classic" linear leptomeningeal disease appearance. CONCLUSIONS: Most IMM measuring between 2 and 9 mm in diameter are corticomeningeal nodules. These data raise the hypothesis that deeper parenchymal extension of IMM occurs secondarily. If the leptomeninges provide a preferential site for establishment of IMM, further investigation of the underlying biology of this phenomenon may provide opportunities for novel therapeutic strategies for patients with IMM.


Assuntos
Imageamento por Ressonância Magnética/métodos , Melanoma/patologia , Neoplasias Meníngeas/diagnóstico por imagem , Neoplasias Meníngeas/patologia , Meningioma/diagnóstico por imagem , Meningioma/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Encéfalo/diagnóstico por imagem , Encéfalo/patologia , Feminino , Humanos , Masculino , Neoplasias Meníngeas/secundário , Meningioma/secundário , Pessoa de Meia-Idade , Estudos Retrospectivos , Adulto Jovem
15.
Radiother Oncol ; 142: 27-35, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31563407

RESUMO

BACKGROUND: Following the resection of brain metastases, Stereotactic Radiosurgery (SRS) to the post-operative surgical cavity has increasingly replaced Whole Brain Radiotherapy (WBRT) as the standard of practice. There is however tremendous variation in the way SRS can be delivered and outcomes of SRS are yet to be systemically characterized. METHODS: Pubmed, Medline, Embase, and Cochrane databases were searched through June 2019 to identify papers that examined post-operative SRS after resection of brain metastases. An aggregate data analysis was performed to estimate the pooled rate of local control at 12 months (LC12), radiation necrosis, and leptomengingeal disease dissemination as binary outcomes. We pre-specified a random effects model using the method of DerSimonian and Laird with the Mantel-Haenszel weighting scheme and a fixed continuity correction of 0.5. Heterogeneity was assessed using the I2 statistic. RESULTS: Fifty studies involving 3458 patients were included for analysis. LC12 across all studies was found to be 83.7%. Patients treated with fractionated SRS had better local control than patients treated with single fraction SRS (LC12 87.3% vs 80.0%, p = 0.021) in a univariate analysis. There was no improved LC12 with the addition of a margin (LC12 of 84.3% vs 83.1% with no margin, p = 0.71). Radiation necrosis was rare at 6.9% across all reported studies and leptomeningeal disease was found to be 13% across all reported studies. One year distant brain control was found to be 52.8%. CONCLUSION: Our review supports the use of post-operative SRS to the resection cavity as a safe and efficacious treatment option. Fractionated SRS appears to be beneficial and warrants further exploration.


Assuntos
Neoplasias Encefálicas/radioterapia , Neoplasias Encefálicas/secundário , Radiocirurgia/métodos , Neoplasias Encefálicas/cirurgia , Irradiação Craniana/métodos , Humanos , Período Pós-Operatório , Lesões por Radiação/etiologia , Planejamento da Radioterapia Assistida por Computador/métodos , Ensaios Clínicos Controlados Aleatórios como Assunto , Estudos Retrospectivos , Resultado do Tratamento
16.
Curr Oncol Rep ; 21(8): 73, 2019 07 04.
Artigo em Inglês | MEDLINE | ID: mdl-31270629

RESUMO

PURPOSE OF REVIEW: Recent randomized evidence has supported the use of resection followed by stereotactic radiosurgery (SRS) as standard of care for patients with a limited number of brain metastases. However, there are known toxicities, including a relatively high incidence of leptomeningeal disease. Neoadjuvant SRS has been proposed to minimize these potential sequalae. This review summarizes the current data and principles for neoadjuvant SRS. RECENT FINDINGS: Recently published studies have demonstrated neoadjuvant SRS to be feasible and to achieve similar oncological outcomes to postoperative SRS. A decreased incidence of leptomeningeal disease and radionecrosis has been observed. Additionally, neoadjuvant SRS can improve accuracy of target volume delineation and decrease the volume of irradiated normal tissue. Neoadjuvant SRS has emerged as a promising sequencing management approach. Its main advantages appear to be in reduction of toxicity. Ongoing trials will further explore this treatment method and establish which patients will benefit most from this technique.


Assuntos
Neoplasias Encefálicas/radioterapia , Neoplasias Encefálicas/secundário , Radiocirurgia , Humanos , Neoplasias Meníngeas/etiologia , Terapia Neoadjuvante/efeitos adversos , Lesões por Radiação/etiologia , Radiocirurgia/efeitos adversos , Resultado do Tratamento , Carga Tumoral
17.
J Clin Neurosci ; 58: 224-225, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-30253907

RESUMO

Meningiomas are the most frequent primary brain tumours and are often managed with surgical excision. We present the case of a young woman with the unusual phenomenon of iatrogenic subcutaneous seeding from an intracranial meningioma. We discuss the risk factors, possible mechanisms and management of this.


Assuntos
Doença Iatrogênica , Neoplasias Meníngeas/patologia , Meningioma/secundário , Inoculação de Neoplasia , Adulto , Feminino , Humanos , Neoplasias Meníngeas/cirurgia , Meningioma/cirurgia
18.
Am Soc Clin Oncol Educ Book ; 38: 741-750, 2018 May 23.
Artigo em Inglês | MEDLINE | ID: mdl-30231345

RESUMO

The remarkable advances in the systemic therapy of metastatic melanoma have now extended the 1-year overall survival rate from 25% to nearing 85%. Systemic treatment in the form of BRAF-targeted therapy and immunotherapy is slowly but surely proving its efficacy in the treatment of metatstatic brain metastases (MBM). Single-agent BRAF inhibitors provide an intracranial response rate of 25% to 40%, whereas the combination of BRAFi/MEKi leads to responses in up to 58%. However, the durability of responses induced by BRAFi/MEKi seems to be even shorter than in extracranial disease. On the other hand, single-agent ipilimumab provides comparable clinical benefit in MBMs as it does in extracranial metastases. Single-agent PD-1 anitbodies induce response rates of approximately 20%, and those responses appear durable. Similarly the combination of CTLA-4+ PD-1 antibodies induces durable responses at an impressive rate of 55% and is safe to administer. Although the local treatment approaches with radiation and surgery remain important and are critically needed in the management of MBM, systemic therapy offers a new dimension that can augment the impact of those therapies and come at a potentially lower cost of neurocognitive impairment. Considerations for combining those modalities are direly needed, in addition to considering novel systemic combinations that target mechanisms specific to MBM. In this report, we will discuss the underlying biology of melanoma brain metastases, the clinical outcomes from recent clinical trials of targeted and immunotherapy, and their impact on clinical practice in the context of existing local therapeutic modalities.


Assuntos
Neoplasias Encefálicas/terapia , Melanoma/terapia , Neoplasias Encefálicas/patologia , Humanos , Melanoma/patologia , Metástase Neoplásica
19.
Radiother Oncol ; 107(2): 140-6, 2013 May.
Artigo em Inglês | MEDLINE | ID: mdl-23684585

RESUMO

BACKGROUND AND PURPOSE: To compare rates of late gastrointestinal toxicity, late genitourinary toxicity and biochemical failure between patients treated for prostate cancer with implanted fiducial marker image guided radiotherapy (FMIGRT), and those treated without FMIGRT. METHODS AND MATERIALS: We performed a single institution retrospective study comparing all 311 patients who received 74 Gy without fiducial markers in 2006 versus all 243 patients who received our updated regimen of 78 Gy with FMIGRT in 2008. Patient records were reviewed 27 months after completing radiotherapy. Biochemical failure was defined using the Phoenix definition. Details of late gastrointestinal and genitourinary toxicities were graded according to CTCAEv4. Moderate/severe toxicity was defined as a grade 2 or higher toxicity. Cumulative incidence and prevalence curves for moderate/severe toxicity were constructed and compared using multistate modeling while biochemical failure free survival was compared using the log rank test. A Cox regression model was developed to correct for confounding factors. RESULTS: Median follow-up time for both groups was 22 months. The hazard ratio for moderate/severe late gastrointestinal toxicity in the non-FMIGRT group was 3.66 [95% CI (1.63-8.23), p=0.003] compared to patients in the FMIGRT group. There was no difference in the hazard ratio of moderate/severe late genitourinary toxicity between the two groups (0.44 [95% CI (0.19-1.00)]), but patients treated with FMIGRT did have a quicker recovery from their genitourinary toxicities HR=0.24 [95% CI (0.10-0.59)]. We were unable to detect any differences in biochemical failure free survival between the cohorts HR=0.60 [95% CI (0.30-1.20), p=0.143]. CONCLUSION: Despite dose escalation, the use of FMIGRT in radical radiotherapy for prostate cancer significantly reduces the incidence of gastrointestinal toxicity and the duration of late genitourinary toxicity when compared to conventional non-FMIGRT techniques.


Assuntos
Neoplasias da Próstata/radioterapia , Radioterapia Guiada por Imagem , Humanos , Masculino , Modelos de Riscos Proporcionais , Neoplasias da Próstata/mortalidade , Radioterapia Guiada por Imagem/efeitos adversos , Estudos Retrospectivos
20.
Clin Teach ; 9(2): 80-4, 2012 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-22405359

RESUMO

BACKGROUND: The fishbowl method is a small group teaching technique in which a number of students engage in a discussion while observers form a circle around them. We use this method to teach medical interviewing skills, with students interviewing a simulated patient (SP) whilst being observed by their peers and a clinical tutor. However, there is little evidence to guide teachers on how best to structure a fishbowl tutorial. METHODS: Our aim was to develop guidelines for teaching medical interviewing skills in the context of a fishbowl tutorial by assessing preferred teaching approaches for all participants (students, tutors and SPs). Participant preferences for teaching in the fishbowl were established using questionnaires designed to seek participants' opinions on various aspects of fishbowl tutorials, integrating key areas of difficulty highlighted during SP and tutor training sessions. RESULTS: Across most items there was a high degree of consistency in the preferences of tutors, students and SPs, which enabled us to develop a set of guidelines for running a fishbowl tutorial to be used for our teaching programme. DISCUSSION: We found this process to be acceptable to all parties and relatively simple to perform. It helped us to define our preferred procedures for teaching medical interviewing skills using the fishbowl method. The process of gauging participant opinion to develop teaching guidelines is appropriate for use by other institutions to inform their teaching practices in the fishbowl technique, although the nature of the guidelines may differ across teaching settings. Further research is required to determine if the implementation of these guidelines improves student satisfaction with fishbowl tutorials.


Assuntos
Educação de Graduação em Medicina/métodos , Processos Grupais , Simulação de Paciente , Desenvolvimento de Programas , Competência Clínica , Guias como Assunto , Humanos , Inquéritos e Questionários
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