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https://www.readbyqxmd.com/read/29040703/evidence-and-context-of-use-for-contrast-enhancement-as-a-surrogate-of-disease-burden-and-treatment-response-in-malignant-glioma
#1
Benjamin M Ellingson, Patrick Y Wen, Timothy F Cloughesy
The use of contrast enhancement within the brain on CT or MRI has been the gold standard for diagnosis and therapeutic response assessment in malignant gliomas for decades. The use of contrast enhancing tumor size, however, remains controversial as a tool for accurately diagnosing and assessing treatment efficacy in malignant gliomas, particularly in the current, quickly evolving therapeutic landscape. The current article consolidates overwhelming evidence from hundreds of studies in the field of neuro-oncology, providing the necessary evidence base and specific contexts of use for consideration of contrast enhancing tumor size as an appropriate surrogate biomarker for disease burden and as a tool for measuring treatment response in malignant glioma, including glioblastoma...
October 12, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/29036345/phase-ii-study-of-cabozantinib-in-patients-with-progressive-glioblastoma-subset-analysis-of-patients-with-prior-antiangiogenic-therapy
#2
Timothy F Cloughesy, Jan Drappatz, John de Groot, Michael D Prados, David A Reardon, David Schiff, Marc Chamberlain, Tom Mikkelsen, Annick Desjardins, Jerry Ping, Jaymes Holland, Ron Weitzman, Patrick Y Wen
Background: Cabozantinib is a potent, multi-target inhibitor of hepatocyte growth factor receptor (MET) and vascular endothelial growth factor receptor-2 (VEGFR2). This open-label, phase II trial evaluated cabozantinib in patients with recurrent or progressive glioblastoma (GBM; NCT00704288). Methods: Patients were initially enrolled to a starting cabozantinib dose of 140 mg/day, but the starting dose was amended to 100 mg/day because of safety concerns. Treatment continued until disease progression or unacceptable toxicity...
October 3, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/29022502/pathophysiological-role-of-mitochondrial-potassium-channels-and-their-modulation-by-drugs
#3
Valentina Citi, Vincenzo Calderone, Alma Martelli, Maria Cristina Breschi, Lara Testai
Mitochondria play a central role in ATP-generating processes. Indeed, in mammalian tissues, up to 90% of ATP is generated by mitochondria through the process of oxidative phosphorylation; furthermore, mitochondria are involved in multiple signal transduction pathways. A rapidly expanding body of literature has confirmed that mitochondria play a pivotal role in apoptosis, cardio- and neuro-protection, and various neurodegenerative disorders, ranging from Parkinson's to Alzheimer's disease. It is evident that mitochondria are also the targets of multiple drugs; some of these are exactly designed to influence mitochondrial function, while others have primary targets in other cellular locations but may interact with mitochondria because of the presence of numerous targets on this organelle...
October 12, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29016919/challenges-of-developing-small-molecule-kinase-inhibitors-for-brain-tumors-and-the-need-for-emphasis-on-free-drug-levels
#4
Timothy P Heffron
Despite biological rationale and significant clinical study, the pursuit of small molecule kinase inhibitors for the treatment of brain cancers has had very limited success. This Advance-in-Brief discusses the need for drugs to achieve free brain penetration to engage their targets where CNS tumors reside. This need to achieve free, as opposed to total, drug concentrations in the brain may be a contributing factor to why so many small molecule kinase inhibitors have not realized success in the neuro-oncology setting...
September 16, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/29016837/multicenter-pilot-study-of-radio-chemotherapy-as-first-line-treatment-for-adults-with-medulloblastoma-noa-07
#5
Dagmar Dagmar, Martin Proescholdt, Christiane Reinert, Torsten Pietsch, David T W Jones, Stefan M Pfister, Elke Hattingen, Clemens Seidel, Linda Dirven, Ralf Luerding, Jaap Reijneveld, Monika Warmuth-Metz, Matteo Bonsanto, Michael Bremer, Stephanie Combs, Stefan Rieken, Ulrich Herrlinger, Holger Kuntze, Regine Mayer-Steinacker, Dag Moskopp, Thomas Schneider, Andreas Beringer, Uwe Schlegel, Walter Stummer, Helmut Welker, Astrid Weyerbrock, Frank Paulsen, Stefan Rutkowski, Michael Weller, Wolfgang Wick, Rolf-Dieter Kortmann, Ulrich Bogdahn, Peter Hau
Background: Medulloblastoma in adult patients is rare, with 0.6 cases per million. Prognosis depends on clinical factors and medulloblastoma entity. No prospective data on the feasibility of radio-chemotherapy exist. The German Neuro-Oncology Working Group (NOA) performed a prospective descriptive multicenter single-arm Phase II trial to evaluate feasibility and toxicity of radio-polychemotherapy. Methods: The NOA-07 trial combined cranio-spinal irradiation with vincristine, followed by eight cycles of cisplatin, lomustine and vincristine...
August 21, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28988668/-neurophysiological-monitoring-options-in-brain-tumour-resections-consensus-statement-from-the-spanish-society-of-neurosurgery-s-senec-neuro-oncology-working-group-and-the-spanish-society-of-clinical-neurophysiology-senfc
#6
Cristian de Quintana-Schmidt, Estela Lladó-Carbo, Victoria Eugenia Cortés-Doñate
Brain tumours located in or in proximity to eloquent areas are a significant neurosurgical challenge. Performing this kind of surgery with neurophysiological monitoring to improve resections with reduced permanent focal neurological deficit has become widely accepted in the literature. However, how to conduct this monitoring, the exact definition of an eloquent area and whether to perform this surgery with the patient awake or asleep are still subject to rigorous scientific debate. Members of the Neuro-oncology Working Group (GTNO) of the Spanish Society of Neurosurgery (SENEC) and members of the Spanish Society of Clinical Neurophysiology (SENFC) have published a consensus statement to explain the different neurophysiological monitoring options currently available in awake and asleep patients to obtain better surgical resection without neurological deficits...
October 5, 2017: Neurocirugía
https://www.readbyqxmd.com/read/28987677/quantification-accuracy-of-neuro-oncology-pet-data-as-a-function-of-emission-scan-duration-in-pet-mr-compared-to-pet-ct
#7
Stefan Wampl, Ivo Rausch, Tatjana Traub-Weidinger, Thomas Beyer, Martin Gröschl, Jacobo Cal-González
OBJECTIVES: To evaluate and compare the effect of reduced acquisition time, as a surrogate of injected activity, on the PET quantification accuracy in PET/CT and PET/MR imaging. METHODS: Twenty min (18)F-FDG phantom measurements and 10min (18)F-FET brain scans were acquired in a Biograph-True-Point-True-View PET/CT (n=8) and a Biograph mMR PET/MR (n=16). Listmode data were repeatedly split into frames of 1min to 10min length and reconstructed using two different reconstruction settings of a 3D-OSEM algorithm: with post-filtering ("OSEM"), and without post-filtering but with resolution recovery ("PSF")...
October 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28973512/big-data-research-in-neurosurgery-a-critical-look-at-this-popular-new-study-design
#8
Chesney S Oravec, Mustafa Motiwala, Kevin Reed, Douglas Kondziolka, Fred G Barker, L Madison Michael, Paul Klimo
The use of "big data" in neurosurgical research has become increasingly popular. However, using this type of data comes with limitations. This study aimed to shed light on this new approach to clinical research. We compiled a list of commonly used databases that were not specifically created to study neurosurgical procedures, conditions, or diseases. Three North American journals were manually searched for articles published since 2000 utilizing these and other non-neurosurgery-specific databases. A number of data points per article were collected, tallied, and analyzed...
July 21, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28969541/theranostic-potential-of-targeted-nanoparticles-for-brain-cancer
#9
Ajita Bhatt, Ekta Gurnany, Anuj Modi, Arvind Gulbake, Aviral Jain
Cancer is one of the most important causes of morbidity and mortality all across the world. On an average, every year approximately 238,000 new cases of brain and other central nervous system tumors are diagnosed around the world. Amongst all, tumors of brain account for nearly 85% to 90% of all primary central nervous system (CNS) tumors. Regardless of tremendous scientific efforts to develop newer diagnostic techniques and latest therapy, the management of brain cancer is still challenge in neuro-oncology...
September 26, 2017: Mini Reviews in Medicinal Chemistry
https://www.readbyqxmd.com/read/28945885/single-fraction-radiosurgery-using-conservative-doses-for-brain-metastases-durable-responses-in-select-primaries-with-limited-toxicity
#10
Michael Cummings, Paul Youn, Derek P Bergsma, Kenneth Y Usuki, Kevin Walter, Manju Sharma, Paul Okunieff, Michael C Schell, Michael T Milano
BACKGROUND: Optimal doses for single-fraction stereotactic radiosurgery (SRS) in the treatment of brain metastases are not well established. Our institution utilized conservative dosing compared to maximum-tolerated doses from the Radiation Therapy Oncology Group 90-05 Phase I study. OBJECTIVE: To report individual lesion control (LC) from conservative single-fraction doses and determine factors affecting LC. METHODS: From 2003 to 2015, patients who underwent linear accelerator-based single-fraction SRS for cerebral/cerebellar metastases and receiving at least 1 follow-up magnetic resonance imaging (MRI) were identified...
August 12, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28937149/neuro-oncology-a-new-role-for-zika-virus-in-glioblastoma-therapy
#11
Heather Wood
No abstract text is available yet for this article.
September 22, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28928820/management-of-supratentorial-recurrent-low-grade-glioma-a-multidisciplinary-experience-in-35-adult-patients
#12
Julien Spitaels, Daniel Devriendt, Niloufar Sadeghi, Sylvie Luce, Olivier De Witte, Serge Goldman, Christian Mélot, Florence Lefranc
The management of recurrent diffuse low-grade gliomas (LGGs) is controversial. In the present study, the multidisciplinary management of 35 patients with recurrent LGGs was retrospectively analyzed. Tumor progression or recurrence was defined by clinical, radiological and/or metabolic pejorative evolution. All patients were regularly followed up by a multidisciplinary neuro-oncological group at Hôpital Erasme. Patients with histologically confirmed supratentorial LGGs (7 astrocytoma, 22 oligodendrogliomas and 6 oligoastrocytomas) who had undergone surgery between August 2004 and November 2010 were included...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927746/-proposal-of-screening-for-diffuse-low-grade-gliomas-in-the-population-from-20-to-40years
#13
Emmanuel Mandonnet, Luc Taillandier, Hugues Duffau
Diffuse low-grade gliomas (DLGG) are cerebral tumors occurring in young adults, with an inescapable progression to higher grade of malignancy, resulting in functional impairment and death. DLGG evolve in several phases: an asymptomatic period despite a slow radiological growth; a period in which inaugural symptoms occur, usually epilepsy with possible mild cognitive disorders; then a phase with malignant transformation generating disabling neurological deficits; and ultimately the terminal stage. Early maximal surgical resection significantly increases overall survival while preserving quality of life...
September 15, 2017: La Presse Médicale
https://www.readbyqxmd.com/read/28927109/disease-progression-patterns-of-bevacizumab-responders-with-recurrent-malignant-gliomas
#14
Ju-Hwi Kim, Tae-Young Jung, Eu Chang Hwang, Sung-Hoon Jung, Shin Jung, In-Young Kim, Woo-Youl Jang, Kyung-Sub Moon, Kyung-Hwa Lee, Seul-Kee Kim
Tumor progression in patients with recurrent malignant glioma who respond to bevacizumab (BEV) is difficult to assess. The current study reviewed the clinical and radiological results of patients following a BEV-based chemotherapy regimen, and evaluated disease progression patterns in patients who responded to BEV therapy. From August 2011 to November 2015, 24 patients (18 glioblastoma cases and 6 anaplastic astrocytoma cases) were treated with BEV-based chemotherapy. In total, 6 patients were treated with BEV alone and 18 patients were treated with BEV combined with irinotecan...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28917281/magnetic-resonance-thermometry-and-laser-interstitial-thermal-therapy-for-brain-tumors
#15
REVIEW
Danilo Silva, Mayur Sharma, Rupa Juthani, Antonio Meola, Gene H Barnett
Recent technological advancements in intraoperative imaging are shaping the way for a new era in brain tumor surgery. Magnetic resonance thermometry has provided intraoperative real-time imaging feedback for safe and effective application of laser interstitial thermal therapy (LITT) in neuro-oncology. Thermal ablation has also established itself as a surgical option in epilepsy surgery and is currently used in spine oncology with promising results. This article reviews the principles and rationale as well as the clinical application of LITT for brain tumors...
October 2017: Neurosurgery Clinics of North America
https://www.readbyqxmd.com/read/28912153/comprehensive-genomic-profiling-of-282-pediatric-low-and-high-grade-gliomas-reveals-genomic-drivers-tumor-mutational-burden-and-hypermutation-signatures
#16
Adrienne Johnson, Eric Severson, Laurie Gay, Jo-Anne Vergilio, Julia Elvin, James Suh, Sugganth Daniel, Mandy Covert, Garrett M Frampton, Sigmund Hsu, Glenn J Lesser, Kimberly Stogner-Underwood, Ryan T Mott, Sarah Z Rush, Jennifer J Stanke, Sonika Dahiya, James Sun, Prasanth Reddy, Zachary R Chalmers, Rachel Erlich, Yakov Chudnovsky, David Fabrizio, Alexa B Schrock, Siraj Ali, Vincent Miller, Philip J Stephens, Jeffrey Ross, John R Crawford, Shakti H Ramkissoon
BACKGROUND: Pediatric brain tumors are the leading cause of death for children with cancer in the U.S. Incorporating next-generation sequencing data for both pediatric low-grade (pLGGs) and high-grade gliomas (pHGGs) can inform diagnostic, prognostic, and therapeutic decision-making. MATERIALS AND METHODS: We performed comprehensive genomic profiling on 282 pediatric gliomas (157 pHGGs, 125 pLGGs), sequencing 315 cancer-related genes and calculating the tumor mutational burden (TMB; mutations per megabase [Mb])...
September 14, 2017: Oncologist
https://www.readbyqxmd.com/read/28887756/development-of-the-pediatric-neuro-oncology-rating-of-treatment-intensity-pnorti
#17
Matthew C Hocking, Wendy Hobbie, Michael J Fisher
Measures of treatment intensity for childhood cancer are needed in research in order to control for variability in treatments. Existing measures of treatment intensity for childhood cancers do not reflect the complexities of treatment protocols for central nervous system (CNS) tumors. This paper describes the development of the Pediatric Neuro-Oncology Rating of Treatment Intensity (PNORTI). PNORTI development occurred in three phases. Phase 1: five experts in pediatric neuro-oncology created a 5-point scale of treatment intensity and 42 pediatric neuro-oncology providers completed a three-part online questionnaire to evaluate the classification system and apply the rating system to 16 sample patients...
September 8, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28875373/differentiating-brain-radionecrosis-from-tumour-recurrence-a-role-for-contrast-enhanced-ultrasound
#18
Luca Mattei, Francesco Prada, Marcello Marchetti, Paola Gaviani, Francesco DiMeco
Differentiating radionecrosis from tumour recurrence is a major issue in neuro-oncology. Conventional imaging is far from being validated as an alternative to histological assessment. We report the case of a patient operated on for suspected recurrence of brain metastasis 9 months after cyberknife radiosurgery. While magnetic resonance imaging showed strong enhancement of the lesion, intraoperative contrast-enhanced ultrasonography (CEUS) surprisingly did not-different from what is expected for brain metastases...
September 5, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28875328/-critical-consideration-of-the-european-association-for-neuro-oncology-eano-guideline-on-the-diagnosis-and-treatment-of-adult-astrocytic-and-oligodendroglial-gliomas
#19
Sophia Scharl, Christoph Straube, Bernhard Meyer, Friederike Schmidt-Graf, Stephanie E Combs
No abstract text is available yet for this article.
September 5, 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/28871996/prognostic-relevance-of-treatment-failure-patterns-in-pediatric-high-grade-glioma-is-there-a-role-for-a-revised-failure-classification-system
#20
John T Lucas, David A Cooper, Scott Hwang, Christopher Tinkle, Xingyu Li, Yimei Li, Brent Orr, Thomas E Merchant, Alberto Broniscer
PURPOSE: We sought to investigate the pattern of treatment failure with respect to anatomic extent, radiation dose, and criteria for failure according to the Response Assessment in Neuro-Oncology (RANO). We evaluated the corresponding prognostic significance of these factors in patients with pediatric high-grade glioma (pHGG). METHODS AND MATERIALS: Fifty-six patients with pHGG were enrolled in an institutional phase 1 to 2 prospective trial that included maximal safe resection and radiation therapy with concurrent and adjuvant erlotinib...
October 1, 2017: International Journal of Radiation Oncology, Biology, Physics
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