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https://www.readbyqxmd.com/read/28645605/emergency-reoperations-in-cranial-neurosurgery
#1
Borys M Kwinta, Roger M Krzyżewski, Kornelia M Kliś, Paulina Donicz, Małgorzata Gackowska, Jarosław Polak, Krzysztof Stachura, Marek Moskała
BACKGROUND: Complications after neurosurgical procedures which lead to reoperation are associated with poor outcome and economic costs. Therefore the aim of our study was to establish predictors of reoperation due to complications after cranial neurosurgery. METHODS: We retrospectively analysed 875 patients who underwent a cranial neurosurgical procedure. We used univariate and multivariate logistic regression analysis to determine the possible predictors of reoperation...
June 20, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28643878/frameless-stereotactic-radiotherapy-alone-and-combined-with-temozolomide-for-presumed-canine-gliomas
#2
M Dolera, L Malfassi, C Bianchi, N Carrara, S Finesso, S Marcarini, G Mazza, S Pavesi, M Sala, G Urso
We evaluated stereotactic volume modulated arc radiotherapy (VMAT) for canine gliomas, alone (radiotherapy [RT]) and in combination with temozolomide (RT + TMZ), compared with palliation. Overall and disease-specific survival times were estimated. Thirty dogs were palliated, 22 dogs were treated with RT and 20 with RT + TMZ. Complete and partial responses were observed in 63.2% and 90.9% of patients in the RT and RT + TMZ arms, respectively, that were alive at 1 year. Median survival in the palliation arm was 94 days (95% conformity index [CI] 87÷101)...
June 23, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28643795/the-genomic-landscape-of-tuberous-sclerosis-complex
#3
Katie R Martin, Wanding Zhou, Megan J Bowman, Juliann Shih, Kit Sing Au, Kristin E Dittenhafer-Reed, Kellie A Sisson, Julie Koeman, Daniel J Weisenberger, Sandra L Cottingham, Steven T DeRoos, Orrin Devinsky, Mary E Winn, Andrew D Cherniack, Hui Shen, Hope Northrup, Darcy A Krueger, Jeffrey P MacKeigan
Tuberous sclerosis complex (TSC) is a rare genetic disease causing multisystem growth of benign tumours and other hamartomatous lesions, which leads to diverse and debilitating clinical symptoms. Patients are born with TSC1 or TSC2 mutations, and somatic inactivation of wild-type alleles drives MTOR activation; however, second hits to TSC1/TSC2 are not always observed. Here, we present the genomic landscape of TSC hamartomas. We determine that TSC lesions contain a low somatic mutational burden relative to carcinomas, a subset feature large-scale chromosomal aberrations, and highly conserved molecular signatures for each type exist...
June 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28643694/simultaneous-maximum-a-i-posteriori-i-longitudinal-pet-image-reconstruction
#4
Sam Ellis, Andrew J Reader
Positron emission tomography (PET) is frequently used to monitor functional changes that occur over extended time scales, for example in longitudinal oncology PET protocols that include routine clinical follow-up scans to assess the efficacy of a course of treatment. In these contexts PET datasets are currently reconstructed into images using single-dataset reconstruction methods. Inspired by recently proposed joint PET-MR reconstruction methods, we propose to reconstruct longitudinal datasets simultaneously by using a joint penalty term in order to exploit the high degree of similarity between longitudinal images...
June 23, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28643545/application-of-intravoxel-incoherent-motion-ivim-magnetic-resonance-imaging-in-the-evaluation-of-primitive-brain-tumours
#5
A Catanese, F Malacario, L Cirillo, F Toni, C Zenesini, D Casolino, A Bacci, R Agati
Intravoxel incoherent motion is a potential non-invasive diagnostic tool in brain tumours, without any clear guidelines for its evaluation yet. In our study, we compare intravoxel incoherent motion with dynamic susceptibility contrast magnetic resonance imaging in the quantification of tumour tissue blood perfusion in 28 patients affected by brain tumours, highlighting the issues encountered during the acquisition set-up and post-processing steps. Intravoxel incoherent motion is a new imaging tool and an alternative technique to dynamic susceptibility contrast-magnetic resonance imaging which is of considerable interest at present...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28637487/the-nf1-somatic-mutational-landscape-in-sporadic-human-cancers
#6
REVIEW
Charlotte Philpott, Hannah Tovell, Ian M Frayling, David N Cooper, Meena Upadhyaya
BACKGROUND: Neurofibromatosis type 1 (NF1: Online Mendelian Inheritance in Man (OMIM) #162200) is an autosomal dominantly inherited tumour predisposition syndrome. Heritable constitutional mutations in the NF1 gene result in dysregulation of the RAS/MAPK pathway and are causative of NF1. The major known function of the NF1 gene product neurofibromin is to downregulate RAS. NF1 exhibits variable clinical expression and is characterized by benign cutaneous lesions including neurofibromas and café-au-lait macules, as well as a predisposition to various types of malignancy, such as breast cancer and leukaemia...
June 21, 2017: Human Genomics
https://www.readbyqxmd.com/read/28637445/cerebellar-mutism-syndrome-in-children-with-brain-tumours-of-the-posterior-fossa
#7
Morten Wibroe, Johan Cappelen, Charlotte Castor, Niels Clausen, Pernilla Grillner, Thora Gudrunardottir, Ramneek Gupta, Bengt Gustavsson, Mats Heyman, Stefan Holm, Atte Karppinen, Camilla Klausen, Tuula Lönnqvist, René Mathiasen, Pelle Nilsson, Karsten Nysom, Karin Persson, Olof Rask, Kjeld Schmiegelow, Astrid Sehested, Harald Thomassen, Ingrid Tonning-Olsson, Barbara Zetterqvist, Marianne Juhler
BACKGROUND: Central nervous system tumours constitute 25% of all childhood cancers; more than half are located in the posterior fossa and surgery is usually part of therapy. One of the most disabling late effects of posterior fossa tumour surgery is the cerebellar mutism syndrome (CMS) which has been reported in up to 39% of the patients but the exact incidence is uncertain since milder cases may be unrecognized. Recovery is usually incomplete. Reported risk factors are tumour type, midline location and brainstem involvement, but the exact aetiology, surgical and other risk factors, the clinical course and strategies for prevention and treatment are yet to be determined...
June 21, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28635617/the-dosimetric-impact-of-gadolinium-based-contrast-media-in-gbm-brain-patient-plans-for-a-mri-linac
#8
Syed Bilal Ahmad, Moti Raj Paudel, Arman Sarfehnia, Anthony Kim, Geordi Pang, Mark Ruschin, Arjun Sahgal, Brian M Keller
Dosimetric effects of gadolinium based contrast media (Gadovist) were evaluated for the Elekta MRI Linear accelerator (MRL) using the research version of Monaco treatment planning system (TPS). In order to represent a gadolinium uptake it was manually assigned to a phantom as well as to the Gross Tumour Volume (GTV) of 6 Glioblastoma Multiforme (GBM) patients. A preliminary estimate of dose enhancement, due to gadolinium, was performed using the phantom irradiated with a single beam. More complicated assessment was performed for the GBM patients using a 7 field IMRT technique...
June 21, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28634106/biology-evolution-and-medical-importance-of-polyomaviruses-an-update
#9
REVIEW
Ugo Moens, Andi Krumbholz, Bernhard Ehlers, Roland Zell, Reimar Johne, Sébastien Calvignac-Spencer, Chris Lauber
The family Polyomaviridae encompasses non-enveloped viruses with a circular dsDNA genome that is typically approximately 5000bp in length. Originally isolated from mammals, polyomavirus sequences have now been detected in invertebrates, fish, amphibians, reptiles and birds, although it remains to be determined whether all these animals are genuine hosts. The genomes of all polyomaviruses encode at least two regulatory proteins (large and small tumour antigen) and two structural proteins (capsid proteins VP1 and VP2) whose functions have been defined...
June 17, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28627984/diagnostic-accuracy-of-proton-magnetic-resonance-spectroscopy-and-perfusion-weighted-imaging-in-brain-gliomas-follow-up-a-single-institutional-experience
#10
Monica Anselmi, Alessia Catalucci, Valentina Felli, Valentina Vellucci, Alessandra Di Sibio, Giovanni Luca Gravina, Mario Di Staso, Ernesto Di Cesare, Carlo Masciocchi
Objectives The objective of this study was to evaluate whether proton magnetic resonance spectroscopy and perfusion magnetic resonance imaging (MRI) are able to increase diagnostic accuracy in the follow-up of brain gliomas, identifying the progression of disease before it becomes evident in the standard MRI; also to evaluate which of the two techniques has the best diagnostic accuracy. Methods Eighty-three patients with cerebral glioma (50 high-grade gliomas (HGGs), 33 low-grade gliomas (LGGs)) were retrospectively enrolled...
June 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28627017/functional-expression-of-calcium-permeable-canonical-transient-receptor-potential-4-containing-channels-promotes-migration-of-medulloblastoma-cells
#11
Wei-Chun Wei, Wan-Chen Huang, Yu-Ping Lin, Esther B E Becker, Olaf Ansorge, Veit Flockerzi, Daniele Conti, Giovanna Cenacchi, Maike D Glitsch
Aberrant intracellular Ca(2+) signalling contributes to the formation and progression of a range of distinct pathologies including cancers. Rises in intracellular Ca(2+) concentration occur in response to Ca(2+) influx through plasma membrane channels and Ca(2+) release from intracellular Ca(2+) stores, which can be mobilised in response to activation of cell surface receptors. OGR1 (Ovarian cancer G protein coupled Receptor 1, aka GPR68) is a proton-sensing Gq -coupled receptor that is most highly expressed in cerebellum...
June 19, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28626411/dissociated-crossed-speech-areas-in-a-tumour-patient
#12
Jörg Mauler, Irene Neuner, Georg Neuloh, Bruno Fimm, Frank Boers, Martin Wiesmann, Hans Clusmann, Karl-Josef Langen, N Jon Shah
In the past, the eloquent areas could be deliberately localised by the invasive Wada test. The very rare cases of dissociated crossed speech areas were accidentally found based on the clinical symptomatology. Today functional magnetic resonance imaging (fMRI)-based imaging can be employed to non-invasively localise the eloquent areas in brain tumour patients for therapy planning. A 41-year-old, left-handed man with a low-grade glioma in the left frontal operculum extending to the insular cortex, tension headaches, and anomic aphasia over 5 months underwent a pre-operative speech area localisation fMRI measurement, which revealed the evidence of the transhemispheric disposition, where the dominant Wernicke speech area is located on the left and the Broca's area is strongly lateralised to the right hemisphere...
May 2017: Case Reports in Neurology
https://www.readbyqxmd.com/read/28625584/the-role-of-prophylactic-antiepileptic-drugs-for-seizure-prophylaxis-in-meningioma-surgery-a-systematic-review
#13
REVIEW
Abdurrahman I Islim, Stephen McKeever, Ter-Er Kusu-Orkar, Michael D Jenkinson
Meningiomas are the commonest type of primary brain tumours. Whilst most patients are seizure-free prior to surgery, antiepileptic drugs are frequently administered to reduce the risk of developing post-operative seizures. However, evidence to support their efficacy in providing this outcome is sparse. To this end, we performed a systematic review to assess the impact of prophylactic antiepileptic drugs on post-operative epilepsy rates in seizure-naïve patients undergoing craniotomy for resection of meningiomas...
June 15, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28624605/transplacental-exposure-to-environmental-carcinogens-association-with-childhood-cancer-risks-and-the-role-of-modulating-factors
#14
REVIEW
A Fucic, V Guszak, A Mantovani
Biological responses to carcinogens from environmental exposure during adulthood are modulated over years or decades. Conversely, during transplacental exposure, the effects on the human foetus change within weeks, intertwining with developmental mechanisms: even short periods of transplacental exposure may be imprinted in the organism for a lifetime. The pathways leading to childhood and juvenile cancers, such as leukaemias, neuroblastoma/brain tumours, hepatoblastoma, and Willm's tumor involve prenatally-induced genomic, epigenomic and/or non-genomic effects caused by xenobiotics...
June 14, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28623325/fluorescence-lifetime-imaging-microscopy-a-novel-diagnostic-tool-for-metastatic-cell-detection-in-the-cerebrospinal-fluid-of-children-with-medulloblastoma
#15
Sivan Gershanov, Shalom Michowiz, Helen Toledano, Gilad Yahav, Orit Barinfeld, Avraham Hirshberg, Haim Ben-Zvi, Gabriel Mircus, Mali Salmon-Divon, Dror Fixler, Nitza Goldenberg-Cohen
In pediatric brain tumours, dissemination of malignant cells within the central nervous system confers poor prognosis and determines treatment intensity, but is often undetectable by imaging or cytology. This study describes the use of fluorescence lifetime (FLT) imaging microscopy (FLIM), a novel diagnostic tool, for detection of metastatic spread. The study group included 15 children with medulloblastoma and 2 with atypical teratoid/rhabdoid tumour. Cells extracted from the tumour and the cerebrospinal fluid (CSF) 2 weeks postoperatively and repeatedly during chemo/radiotherapy were subjected to nuclear staining followed by FLT measurement and cytological study...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28618012/metabolomic-signature-of-brain-cancer
#16
Renu Pandey, Laura Caflisch, Alessia Lodi, Andrew J Brenner, Stefano Tiziani
Despite advances in surgery and adjuvant therapy, brain tumours represent one of the leading causes of cancer-related mortality and morbidity in both adults and children. Gliomas constitute about 60% of all cerebral tumours, showing varying degrees of malignancy. They are difficult to treat due to dismal prognosis and limited therapeutics. Metabolomics is the untargeted and targeted analyses of endogenous and exogenous small molecules, which characterizes the phenotype of an individual. This emerging "omics" science provides functional readouts of cellular activity that contribute greatly to the understanding of cancer biology including brain tumour biology...
June 15, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28608161/the-diagnostic-value-of-high-frequency-power-based-diffusion-weighted-imaging-in-prediction-of-neuroepithelial-tumour-grading
#17
Zhiye Chen, Peng Zhou, Bin Lv, Mengqi Liu, Yan Wang, Yulin Wang, Xin Lou, Qiuping Gui, Huiguang He, Lin Ma
OBJECTIVES: To retrospectively evaluate the diagnostic value of high-frequency power (HFP) compared with the minimum apparent diffusion coefficient (MinADC) in the prediction of neuroepithelial tumour grading. METHODS: Diffusion-weighted imaging (DWI) data were acquired on 115 patients by a 3.0-T MRI system, which included b0 images and b1000 images over the whole brain in each patient. The HFP values and MinADC values were calculated by an in-house script written on the MATLAB platform...
June 12, 2017: European Radiology
https://www.readbyqxmd.com/read/28602779/ceritinib-versus-chemotherapy-in-patients-with-alk-rearranged-non-small-cell-lung-cancer-previously-given-chemotherapy-and-crizotinib-ascend-5-a-randomised-controlled-open-label-phase-3-trial
#18
Alice T Shaw, Tae Min Kim, Lucio Crinò, Cesare Gridelli, Katsuyuki Kiura, Geoffrey Liu, Silvia Novello, Alessandra Bearz, Oliver Gautschi, Tony Mok, Makoto Nishio, Giorgio Scagliotti, David R Spigel, Stéphanie Deudon, Cheng Zheng, Serafino Pantano, Patrick Urban, Cristian Massacesi, Kalyanee Viraswami-Appanna, Enriqueta Felip
BACKGROUND: Ceritinib is a next-generation anaplastic lymphoma kinase (ALK) inhibitor, which has shown robust anti-tumour efficacy, along with intracranial activity, in patients with ALK-rearranged non-small-cell lung cancer. In phase 1 and 2 studies, ceritinib has been shown to be highly active in both ALK inhibitor-naive and ALK inhibitor-pretreated patients who had progressed after chemotherapy (mostly multiple lines). In this study, we compared the efficacy and safety of ceritinib versus single-agent chemotherapy in patients with advanced ALK-rearranged non-small-cell lung cancer who had previously progressed following crizotinib and platinum-based doublet chemotherapy...
June 8, 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28602710/controversial-issues-in-the-management-of-older-adults-with-early-breast-cancer
#19
REVIEW
Anna Rachelle Mislang, Kwok-Leung Cheung, Marije E Hamaker, Ian Kunkler, Christos Markopoulos, Roberto Orecchia, Etienne Brain, Laura Biganzoli
It is well recognized that the incidence of breast cancer increases significantly with age. Despite this, older people remain under-represented in many clinical trials and their management relies on extrapolation of data from younger patients. Providing an aggressive intervention can be challenging, particularly in less fit older patients where a conservative approach is commonly perceived to be more appropriate. The optimal management of this population is unknown and treatment decision should be personalized...
June 8, 2017: Journal of Geriatric Oncology
https://www.readbyqxmd.com/read/28600451/interactions-between-occupational-exposure-to-extremely-low-frequency-magnetic-fields-and-chemicals-for-brain-tumour-risk-in-the-interocc-study
#20
Michelle C Turner, Geza Benke, Joseph D Bowman, Jordi Figuerola, Sarah Fleming, Martine Hours, Laurel Kincl, Daniel Krewski, Dave McLean, Marie-Elise Parent, Lesley Richardson, Siegal Sadetzki, Klaus Schlaefer, Brigitte Schlehofer, Joachim Schüz, Jack Siemiatycki, Martie van Tongeren, Elisabeth Cardis
OBJECTIVES: In absence of clear evidence regarding possible effects of occupational chemical exposures on brain tumour aetiology, it is worthwhile to explore the hypothesis that such exposures might act on brain tumour risk in interaction with occupational exposure to extremely low frequency magnetic fields (ELF). METHODS: INTEROCC is a seven-country (Australia, Canada, France, Germany, Israel, New Zealand and UK), population-based, case-control study, based on the larger INTERPHONE study...
June 9, 2017: Occupational and Environmental Medicine
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