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https://www.readbyqxmd.com/read/29455398/mr-imaging-of-neoplastic-and-non-neoplastic-lesions-of-the-brain-and-spine-in-neurofibromatosis-type-i
#1
Ahmed Abdel Khalek Abdel Razek
The aim of this work is to review the MR imaging of neoplastic and non-neoplastic lesions of the brain and spine in neurofibromatosis type I. Neoplastic lesions are optic pathway gliomas, brain stem gliomas, other gliomas of the brain, and peripheral nerve sheath tumors. Structural changes in the brain include unidentified bright objects, macrocephaly, and enlarged corpus callosum. Bony dysplasia changes as sphenoid ridge dysplasia, spinal scalloping, dural ectasia, and meningoceles. Vasculopathy and cortical cerebral and cerebellar malformations of the brain have been reported...
February 17, 2018: Neurological Sciences
https://www.readbyqxmd.com/read/29441040/intraoperative-photodynamic-diagnosis-using-talaporfin-sodium-simultaneously-applied-for-photodynamic-therapy-against-malignant-glioma-a-prospective-clinical-study
#2
Kazuhide Shimizu, Masayuki Nitta, Takashi Komori, Takashi Maruyama, Takayuki Yasuda, Yu Fujii, Ken Masamune, Takakazu Kawamata, Taketoshi Maehara, Yoshihiro Muragaki
Objective: The goal of this study was to demonstrate the feasibility of intraoperative photodynamic diagnosis (PDD) of malignant glioma using the fluorescence from talaporfin sodium (TS), which is used simultaneously for photodynamic therapy (PDT). Methods: Patients with suspected primary malignant glioma who were eligible for surgical removal of the tumor and PDT with TS were enrolled in this prospective study. Tissue samples were obtained from the contrast-enhanced (CE) region and from the surrounding non-contrast-enhanced (NCE) marginal tissue at the boundary between the tumor and normal tissue...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29426453/progressive-optic-nerve-glioma-orbital-biopsy-technique-using-a-surgical-navigation-system
#3
Ahsen Hussain, Michael Wan, Dan DeAngelis
No abstract text is available yet for this article.
February 2018: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/29424646/optic-pathway-hypothalamic-glioma-hemorrhage-a-series-of-9-patients-and-review-of-the-literature
#4
Kirsten van Baarsen, Jonathan Roth, Natalia Serova, Roger J Packer, Ben Shofty, Ulrich-W Thomale, Giuseppe Cinalli, Helen Toledano, Shalom Michowiz, Shlomi Constantini
OBJECTIVE Hemorrhage (also known as apoplexy) in optic pathway gliomas (OPGs) is rare. Because of the variable presentations and low incidence of OPG hemorrhages, little is known about their clinical course and the best treatment options. The aim of this work was to review risk factors, clinical course, and treatment strategies of optic glioma hemorrhages in the largest possible number of cases. METHODS A total of 34 patients were analyzed. Nine new cases were collected, and 25 were identified in the literature...
February 9, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29419946/photoacoustic-microscopy-for-evaluating-combretastatin-a4-phosphate-induced-vascular-disruption-in-orthotopic-glioma
#5
Renzhe Bi, Ghayathri Balasundaram, Seungwan Jeon, Hui Chien Tay, Yang Pu, Xiuting Li, Mohesh Moothanchery, Chulhong Kim, Malini Olivo
The use of an optical resolution photoacoustic microscopy system (OR-PAM) to evaluate the vascular disruptive effect of Combretastatin A4 Phosphate (CA4P) on a murine orthotopic glioma with intact skull is described here. Second generation optical-resolution PAM scanner with a 532 nm pulsed diode-pumped solid-state (DPSS) laser that specifically matches the absorption maximum of haemoglobin in tissues was used to image orthotopic glioma inoculated in mouse brain. 2D maps of brain vasculature with a lateral resolution of 5 μm and a depth of 700 μm at a field of view 5 × 4 mm were acquired on normal brain and glioma brain...
February 8, 2018: Journal of Biophotonics
https://www.readbyqxmd.com/read/29397378/intraoperative-optical-imaging-of-metabolic-changes-after-direct-cortical-stimulation-a-clinical-tool-for-guidance-during-tumor-resection
#6
Martin Oelschlägel, Tobias Meyer, Gabriele Schackert, Matthias Kirsch, Stephan B Sobottka, Ute Morgenstern
Brain tumor resection is even today one of the most challenging disciplines in neurosurgery. The current state of the art for the identification of tumor tissue during the surgical procedure comprises a wide variety of different tools, each with its own limitations and drawbacks. In this paper, we present a novel approach, the use of optical imaging in connection with direct electrical cortical stimulation (DCS), for identification of impaired tumor tissue and functional intact normal brain tissue under intraoperative conditions...
February 5, 2018: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/29396719/challenges-in-the-management-of-childhood-low-grade-glioma-in-a-developing-country
#7
Khalid Abdalla, Shaker Abdullah, Abeer Almehdar, Naglla Elimam, Mohammed Burhan Abrar, Wasil Jastaniah
BACKGROUND: Treatment modality impacts outcome of childhood low-grade glioma (LGG). Optimizing management in developing countries can be challenging. This study evaluates the clinical characteristics, treatment, and factors influencing outcome of childhood LGG in Saudi Arabia. PATIENTS AND METHODS: This study retrospectively evaluated 59 children consecutively diagnosed with LGG between January 2001 and June 2016. RESULTS: Median age at diagnosis was 6...
February 2, 2018: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29392423/marked-functional-recovery-and-imaging-response-of-refractory-optic-pathway-glioma-to-brafv600e-inhibitor-therapy-a-report-of-two-cases
#8
Santhosh A Upadhyaya, Giles W Robinson, Julie H Harreld, Paul D Klimo, Mary Ellen Hoehn, Brent A Orr, Ibrahim A Qaddoumi
BACKGROUND: Despite appropriate therapeutic interventions, progressive optic pathway glioma (OPG) in children may result in loss of vision and other neurologic morbidities. Molecularly targeted therapy against the MAP kinase pathway holds promise in improving outcomes while resulting in lower treatment-related toxicities. We report two children with refractory OPG who had a substantial and early reversal of their neurologic deficits and an impressive imaging response of their tumor to BRAFV600E inhibition therapy...
February 1, 2018: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29373161/quantitative-microstructural-cerebral-changes-in-neurofibromatosis-type-1
#9
Eva Bültmann, Loukia M Spineli, Hans Hartmann, Annette Sander, Heinrich Lanfermann
OBJECTIVES: To evaluate microstructural cerebral changes in children with neurofibromatosis type 1 (NF1) based on T2 relaxation time measurements at 3Tesla. METHODS: From our dataset of pediatric MRI examinations at 3T 19 pediatric NF1 patients (1.9-14.3 years of age, 9 girls, 10 boys) were retrospectively selected and compared with the previously published group of 44 healthy children (0-16 years of age). MRI examination included a triple echo TSE sequence as basis for T2 maps...
January 17, 2018: Brain & Development
https://www.readbyqxmd.com/read/29355798/awake-surgery-for-gliomas-within-the-right-inferior-parietal-lobule-new-insights-into-the-functional-connectivity-gained-from-stimulation-mapping-and-surgical-implications
#10
Alice Rolland, Guillaume Herbet, Hugues Duffau
OBJECTIVE: Little is known about the functional role of the white matter connections running within and around the right inferior parietal lobule (IPL). We used direct electrostimulation during awake surgery to investigate this connectivity and to avoid permanent deficit following resection for right IPL gliomas. METHODS: We reviewed patients who underwent awake mapping for a glioma involving the right IPL. Resection was achieved up to functional cortico-subcortical boundaries detected by electrostimulation...
January 16, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29343527/visual-outcomes-after-chemotherapy-for-optic-pathway-glioma-in-children-with-and-without-neurofibromatosis-type-1-results-of-the-international-society-of-paediatric-oncology-siop-low-grade-glioma-2004-trial-uk-cohort
#11
Kevin Falzon, Evangelos Drimtzias, Susan Picton, Ian Simmons
AIMS: To report visual acuity (VA) outcomes following chemotherapy for optic pathway glioma (OPG) in children with or without neurofibromatosis type-1 (NF1) and to analyse associated risk factors. METHODS: A prospective, multicentre, cohort study involving 155 children treated between September 2004 and December 2012. Initial and final VA was used for per-eye and per-subject analysis. Correlation tests were performed to determine whether initial VA predicted final VA...
January 17, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29290338/genotype-phenotype-correlation-in-nf1-evidence-for-a-more-severe-phenotype-associated-with-missense-mutations-affecting-nf1-codons-844-848
#12
Magdalena Koczkowska, Yunjia Chen, Tom Callens, Alicia Gomes, Angela Sharp, Sherrell Johnson, Meng-Chang Hsiao, Zhenbin Chen, Meena Balasubramanian, Christopher P Barnett, Troy A Becker, Shay Ben-Shachar, Debora R Bertola, Jaishri O Blakeley, Emma M M Burkitt-Wright, Alison Callaway, Melissa Crenshaw, Karin S Cunha, Mitch Cunningham, Maria D D'Agostino, Karin Dahan, Alessandro De Luca, Anne Destrée, Radhika Dhamija, Marica Eoli, D Gareth R Evans, Patricia Galvin-Parton, Jaya K George-Abraham, Karen W Gripp, Jose Guevara-Campos, Neil A Hanchard, Concepcion Hernández-Chico, LaDonna Immken, Sandra Janssens, Kristi J Jones, Beth A Keena, Aaina Kochhar, Jan Liebelt, Arelis Martir-Negron, Maurice J Mahoney, Isabelle Maystadt, Carey McDougall, Meriel McEntagart, Nancy Mendelsohn, David T Miller, Geert Mortier, Jenny Morton, John Pappas, Scott R Plotkin, Dinel Pond, Kenneth Rosenbaum, Karol Rubin, Laura Russell, Lane S Rutledge, Veronica Saletti, Rhonda Schonberg, Allison Schreiber, Meredith Seidel, Elizabeth Siqveland, David W Stockton, Eva Trevisson, Nicole J Ullrich, Meena Upadhyaya, Rick van Minkelen, Helene Verhelst, Margaret R Wallace, Yoon-Sim Yap, Elaine Zackai, Jonathan Zonana, Vickie Zurcher, Kathleen Claes, Yolanda Martin, Bruce R Korf, Eric Legius, Ludwine M Messiaen
Neurofibromatosis type 1 (NF1), a common genetic disorder with a birth incidence of 1:2,000-3,000, is characterized by a highly variable clinical presentation. To date, only two clinically relevant intragenic genotype-phenotype correlations have been reported for NF1 missense mutations affecting p.Arg1809 and a single amino acid deletion p.Met922del. Both variants predispose to a distinct mild NF1 phenotype with neither externally visible cutaneous/plexiform neurofibromas nor other tumors. Here, we report 162 individuals (129 unrelated probands and 33 affected relatives) heterozygous for a constitutional missense mutation affecting one of five neighboring NF1 codons-Leu844, Cys845, Ala846, Leu847, and Gly848-located in the cysteine-serine-rich domain (CSRD)...
January 4, 2018: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29290016/near-infrared-imaging-an-in-vivo-non-invasive-diagnostic-tool-in-neurofibromatosis-type-1
#13
Antonietta Moramarco, Sandra Giustini, Italo Nofroni, Fabiana Mallone, Emanuele Miraglia, Chiara Iacovino, Stefano Calvieri, Alessandro Lambiase
PURPOSE: Only a few reports in the literature have investigated the presence of ocular abnormalities in neurofibromatosis type 1 (NF-1) patients. The aim of this study was to evaluate the prevalence of ocular abnormalities in a large population of NF1 patients, focusing on the choroidal changes. METHODS: This study was conducted on 160 consecutive patients with NF1 and 106 sex- and age-matched healthy subjects (control). Each patient underwent a complete ophthalmological examination inclusive of best-corrected visual acuity, intraocular pressure measurement, slit-lamp biomicroscopy, indirect fundus biomicroscopy, and near-infrared reflectance (NIR) retinography by using the spectral domain OCT...
December 30, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29280458/radiation-therapy-for-optic-pathway-and-hypothalamic-low-grade-gliomas-in-children
#14
Derek S Tsang, Erin S Murphy, Thomas E Merchant
PURPOSE: The long-term survival of pediatric patients with optic pathway or hypothalamic low-grade glioma (LGG) who receive radiation therapy (RT) has not been previously assessed. METHODS AND MATERIALS: A retrospective study was performed of all patients with optic-hypothalamic pediatric LGG treated with RT at a single institution. Eligible patients were aged ≤21 years at the time of RT and had localized LGG diagnosed by neuroimaging or histology. The median RT dose was 54 Gy, delivered in 30 fractions...
November 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29275545/application-of-optical-coherence-tomography-for-in-vivo-monitoring-of-the-meningeal-lymphatic-vessels-during-opening-of-blood-brain-barrier-mechanisms-of-brain-clearing
#15
Oxana Semyachkina-Glushkovskaya, Arkady Abdurashitov, Alexander Dubrovsky, Denis Bragin, Olga Bragina, Nataliya Shushunova, Galina Maslyakova, Nikita Navolokin, Alla Bucharskaya, Valery Tuchin, Juergen Kurths, Alexander Shirokov
The meningeal lymphatic vessels were discovered 2 years ago as the drainage system involved in the mechanisms underlying the clearance of waste products from the brain. The blood-brain barrier (BBB) is a gatekeeper that strongly controls the movement of different molecules from the blood into the brain. We know the scenarios during the opening of the BBB, but there is extremely limited information on how the brain clears the substances that cross the BBB. Here, using the model of sound-induced opening of the BBB, we clearly show how the brain clears dextran after it crosses the BBB via the meningeal lymphatic vessels...
December 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29261148/advances-in-brain-tumor-surgery-for-glioblastoma-in-adults
#16
REVIEW
Montserrat Lara-Velazquez, Rawan Al-Kharboosh, Stephanie Jeanneret, Carla Vazquez-Ramos, Deependra Mahato, Daryoush Tavanaiepour, Gazanfar Rahmathulla, Alfredo Quinones-Hinojosa
Glioblastoma (GBM) is the most common primary intracranial neoplasia, and is characterized by its extremely poor prognosis. Despite maximum surgery, chemotherapy, and radiation, the histological heterogeneity of GBM makes total eradication impossible, due to residual cancer cells invading the parenchyma, which is not otherwise seen in radiographic images. Even with gross total resection, the heterogeneity and the dormant nature of brain tumor initiating cells allow for therapeutic evasion, contributing to its recurrence and malignant progression, and severely impacting survival...
December 20, 2017: Brain Sciences
https://www.readbyqxmd.com/read/29259535/one-pot-aqueous-synthesis-of-fluorescent-ag-in-zn-s-quantum-dot-polymer-bioconjugates-for-multiplex-optical-bioimaging-of-glioblastoma-cells
#17
Alexandra A P Mansur, Herman S Mansur, Sandhra M Carvalho, Anderson J Caires
Cancer research has experienced astonishing advances recently, but cancer remains a major threat because it is one of the leading causes of death worldwide. Glioblastoma (GBM) is the most malignant brain tumor, where the early diagnosis is vital for longer survival. Thus, this study reports the synthesis of novel water-dispersible ternary AgInS2 (AIS) and quaternary AgInS2-ZnS (ZAIS) fluorescent quantum dots using carboxymethylcellulose (CMC) as ligand for multiplexed bioimaging of malignant glioma cells (U-87 MG)...
2017: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29259030/optical-analysis-of-glioma-fourier-transform-infrared-spectroscopy-reveals-the-idh1-mutation-status
#18
Ortrud Uckermann, Tareq A Juratli, Roberta Galli, Marina Conde, Ralf Wiedemuth, Dietmar Krex, Kathrin D Geiger, Achim Temme, Gabriele Schackert, Edmund Koch, Gerald Steiner, Matthias Kirsch
PURPOSE: Somatic mutations in human cytosolic isocitrate dehydrogenase 1 (IDH1) gene cause profound changes in cell metabolism and are a common feature of gliomas with unprecedented predictive and prognostic impact. Fourier-transform infrared (FT-IR) spectroscopy addresses the molecular composition of cells and tissue and was investigated to deduct the IDH1-mutation status. EXPERIMENTAL DESIGN: We tested the technique on human cell lines that were transduced with IDH1 wild-type or mutated IDH1 and on 34 human glioma samples...
December 19, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29246098/optic-pathway-gliomas-in-neurofibromatosis-type-1
#19
Cynthia J Campen, David H Gutmann
Neurofibromatosis type 1 (NF1) is one of the most common brain tumor predisposition syndromes, in which affected children are prone to the development of low-grade gliomas. While NF1-associated gliomas can be found in several brain regions, the majority arise in the optic nerves, chiasm, tracts, and radiations (optic pathway gliomas; OPGs). Owing to their location, 35-50% of affected children present with reduced visual acuity. Unfortunately, despite tumor stabilization following chemotherapy, vision does not improve in most children...
January 2018: Journal of Child Neurology
https://www.readbyqxmd.com/read/29209585/video-microscope-robotic-arm-assisted-neuronavigation-guided-glioma-resection-and-regional-sampling
#20
Muhammad Waqas, Syed Ather Enam, Fauzan A Hashmi, Fatima Mubarak, Fazal Arain
High-grade gliomas possess internal pathological heterogeneity. Selective sampling of different tumor regions can help in the study of this heterogeneity. In this report, we have described the use of a novel navigation and optical system for the selective regional sampling of a high-grade glioma lesion. A 45-year-old gentleman presented to us with complaints of intermittent frontal headaches for past eight months. On examination, he had subtle pyramidal weakness in left upper and lower extremities. Magnetic resonance imaging (MRI) showed a large contrast-enhancing, space-occupying lesion in the right frontal lobe causing perilesional edema and midline shift...
October 2, 2017: Curēus
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