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https://www.readbyqxmd.com/read/27917302/characterization-of-the-blood-brain-barrier-in-pediatric-central-nervous-system-neoplasms
#1
Christopher S Hong, Winson Ho, Martin G Piazza, Abhik Ray-Chaudhury, Zhengping Zhuang, John D Heiss
OBJECTIVE: The normal blood-brain barrier (BBB) is composed of tight junctions between endothelial cells and surrounding astrocyte foot processes. Breakdown of the physiological astrocyte-endothelial cell relationship occurs in adult metastatic and primary brain tumors. However, the astrocyte-endothelial cell relationship has not been studied in pediatric tumors. MATERIALS AND METHODS: Utilizing specimens from cases of pilocytic astrocytoma (n = 5), medulloblastoma (n = 5), and low-grade diffuse astrocytoma (n = 1), immunofluorescence were performed using primary antibodies against CD31, glial fibrillary acidic protein (GFAP), and aquaporin 4 (AQ4)...
2016: Journal of Interdisciplinary Histopathology
https://www.readbyqxmd.com/read/27911673/genetic-syndromes-associated-with-central-nervous-system-tumors
#2
Charmi Vijapura, Ehab Saad Aldin, Aristides A Capizzano, Bruno Policeni, Yutaka Sato, Toshio Moritani
Several genetic tumor syndromes have associated central nervous system (CNS) neoplasms. The spectrum of syndromes that have intracranial tumor manifestations includes ataxia telangiectasia, Cowden syndrome, familial adenomatous polyposis, hereditary non-polyposis-related colorectal cancer, Li-Fraumeni syndrome, Gorlin syndrome, neurofibromatosis types 1 and 2, multiple endocrine neoplasia type 1, tuberous sclerosis complex, von Hippel-Lindau disease, and Turcot syndrome. Many of these disorders are inherited in an autosomal dominant fashion, and identification of the associated genetic defects has led to improved understanding of the molecular pathways involved in tumorigenesis, helping pave the way to the emergence of molecularly targeted therapeutics...
December 2, 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/27900869/-evaluation-of-five-years-of-treatment-of-erdheim-chester-disease-with-anakinra-case-report-and-overview-of-literature
#3
Zdeněk Adam, Hana Petrášová, Zdeněk Řehák, Renata Koukalová, Marta Krejčí, Luděk Pour, Eva Vetešníková, Aleš Čermák, Sabina Ševčíková, Petr Szturz, Zdeněk Král, Jiří Mayer
: Erdheim-Chester disease is a histiocytic neoplasm of diseases from the group of non-Langerhans-cell histiocytoses, formed by infiltrates of foamy histiocytes. These pathological histiocytes produce pro-inflammatory cytokines. Therefore Erdheim-Chester disease is called inflammatory histiocytary neoplasm. The disease is accompanied by clinical symptoms of systemic inflammatory response, i.e. B symptoms. Imaging examinations detect typical osteosclerotic changes affecting diaphyses and metaphyses of the lower long bones and fibrotic changes which affect the aorta wall and the vessels leading from it...
2016: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/27894359/can-morphological-mri-differentiate-between-primary-central-nervous-system-lymphoma-and-glioblastoma
#4
H Malikova, E Koubska, J Weichet, J Klener, A Rulseh, R Liscak, Z Vojtech
BACKGROUND: Primary central nervous system lymphoma (PCNSL) is a rare, aggressive brain neoplasm that accounts for roughly 2-6% of primary brain tumors. In contrast, glioblastoma (GBM) is the most frequent and severe glioma subtype, accounting for approximately 50% of diffuse gliomas. The aim of the present study was to evaluate morphological MRI characteristics in histologically-proven PCNSL and GBM at the time of their initial presentation. METHODS: We retrospectively evaluated standard diagnostic MRI examinations in 54 immunocompetent patients (26 female, 28 male; age 62...
November 29, 2016: Cancer Imaging: the Official Publication of the International Cancer Imaging Society
https://www.readbyqxmd.com/read/27894339/the-identification-of-human-pituitary-adenoma-initiating-cells
#5
Branavan Manoranjan, Sujeivan Mahendram, Saleh A Almenawer, Chitra Venugopal, Nicole McFarlane, Robin Hallett, Thusyanth Vijayakumar, Almunder Algird, Naresh K Murty, Doron D Sommer, John P Provias, Kesava Reddy, Sheila K Singh
Classified as benign central nervous system (CNS) tumors, pituitary adenomas account for 10% of diagnosed intracranial neoplasms. Although surgery is often curative, patients with invasive macroadenomas continue to experience significant morbidity and are prone to tumor recurrence. Given the identification of human brain tumor-initiating cells (TICs) that initiate and maintain tumor growth while promoting disease progression and relapse in multiple CNS tumors, we investigated whether TICs also drive the growth of human pituitary adenomas...
November 28, 2016: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/27893285/recent-advances-in-subtyping-tumors-of-the-central-nervous-system-using-molecular-data
#6
Jens Schittenhelm
Primary brain tumors account for substantial morbidity and mortality. They often infiltrate the brain diffusely, continue growing, and cause adverse events, such as headaches, seizures, and neurological deficits. The classification of primary brain tumors, based for decades on histology, has been fundamentally changed by the World Health Organization in 2016 by incorporation of molecular data. Areas covered: Literature from glioblastomas, high- and low-grade astrocytic, oligodendroglial, glioneuronal and ependymal tumors from the last five years were reviewed...
November 28, 2016: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/27878658/role-of-matricellular-proteins-in-disorders-of-the-central-nervous-system
#7
A R Jayakumar, A Apeksha, M D Norenberg
Matricellular proteins (MCPs) are actively expressed non-structural proteins present in the extracellular matrix, which rapidly turnover and possess regulatory roles, as well as mediate cell-cell interactions. MCPs characteristically contain binding sites for other extracellular proteins, cell surface receptors, growth factors, cytokines and proteases, that provide structural support for surrounding cells. MCPs are present in most organs, including brain, and play a major role in cell-cell interactions and tissue repair...
November 23, 2016: Neurochemical Research
https://www.readbyqxmd.com/read/27878432/histopathologic-diagnosis-of-brain-metastases-current-trends-in-management-and-future-considerations
#8
Lien Bekaert, Evelyne Emery, Guénaëlle Levallet, Emmanuèle Lechapt-Zalcman
Confronted with brain metastases (BM), pathologists aim to rule out a primary central nervous system (CNS) tumor and to identify or verify the primary tumor site to guide the clinician to specific therapies. Apart from morphological features, ancillary immunohistochemical analysis is the most effective tool for characterizing a metastatic neoplasm of unknown origin. A limited array of antibodies is used, taking into account relevant clinical information and the known brain tropism of lung cancer, breast cancer and melanoma...
November 22, 2016: Brain Tumor Pathology
https://www.readbyqxmd.com/read/27869411/analysis-of-spatial-temporal-clusters-of-childhood-cancer-incidence-in-the-province-of-c%C3%A3-rdoba-argentina-2004-2013
#9
Lisandro Agost
INTRODUCTION: In spite of its low incidence, childhood cancer is becoming increasingly more relevant in Argentina. More advances have been made in cancer treatment than in the study of its etiology or determining factors. There are no investigations that analyze its spatial and temporal distribution or potential clustering. OBJETIVE: To perform exploratory spatial and temporal analyses based on the database of the Registry of Tumors of the Province of Córdoba (2004-2013) to determine the clustering of childhood cancer incidence in Córdoba (Argentina)...
December 1, 2016: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/27863260/applications-of-dna-based-liquid-biopsy-for-central-nervous-system-neoplasms
#10
REVIEW
Joanna Wang, Chetan Bettegowda
The management of central nervous system malignancies remains reliant on histopathological analysis and neuroimaging, despite their complex genetic profile. The intratumoral heterogeneity displayed by these tumors necessitates a more sophisticated method of tumor analysis and monitoring, with the ability to assess tumors over space and time. Circulating biomarkers, including circulating tumor cells, circulating tumor DNA, and extracellular vesicles, hold promise as a type of real-time liquid biopsy able to provide dynamic information not only regarding tumor burden to monitor disease progression and treatment response, but also regarding genetic profile to enable changes in management to match a constantly evolving tumor...
November 15, 2016: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/27857930/neural-axis-metastasis-from-metachronous-pulmonary-basaloid-carcinoma-developed-after-chemotherapy-radiation-therapy-of-uterine-cervical-carcinoma
#11
Myeong Jin Oh, Je Hoon Jeong, Soo Bin Im, Jeong Ja Kwak, Kye-Hyun Nam
Multiple primary or secondary malignancies after anticancer therapy were recently reported to be increasing in frequency. The authors describe a case of metachronous metastatic pulmonary basaloid carcinoma to the central nervous system that was discovered after chemotherapy and radiation therapy for cervical uterine carcinoma. Two different types of cancer developed within some interval. There's the possibility that a secondary pulmonary neoplasm developed after the chemotherapy and radiotherapy conducted as cervical cancer treatment...
October 2016: Korean Journal of Neurotrauma
https://www.readbyqxmd.com/read/27852064/overexpression-of-fzd7-promotes-glioma-cell-proliferation-by-upregulating-taz
#12
Xia Qiu, Jianguo Jiao, Yidong Li, Tian Tian
Gliomas are the most prevalent type of primary brain tumors in adults, accounting for more than 40% of neoplasm in the central nervous system. Frizzled-7 (FZD7) is a seven-pass trans-membrane Wnt receptor that plays a critical role in the development of various tumors. In this study, we detected high-level FZD7 expression in glioma and its overexpression was associated with advanced tumor stage. In vitro functional assays showed that forced overexpression of FZD7 promoted proliferation of gliomas cells, whereas knockdown of endogenous FZD7 significantly suppressed proliferation ability of these cells...
November 11, 2016: Oncotarget
https://www.readbyqxmd.com/read/27836716/activity-and-safety-of-brigatinib-in-alk-rearranged-non-small-cell-lung-cancer-and-other-malignancies-a-single-arm-open-label-phase-1-2-trial
#13
Scott N Gettinger, Lyudmila A Bazhenova, Corey J Langer, Ravi Salgia, Kathryn A Gold, Rafael Rosell, Alice T Shaw, Glen J Weiss, Meera Tugnait, Narayana I Narasimhan, David J Dorer, David Kerstein, Victor M Rivera, Timothy Clackson, Frank G Haluska, David Ross Camidge
BACKGROUND: Anaplastic lymphoma kinase (ALK) gene rearrangements are oncogenic drivers of non-small-cell lung cancer (NSCLC). Brigatinib (AP26113) is an investigational ALK inhibitor with potent preclinical activity against ALK mutants resistant to crizotinib and other ALK inhibitors. We aimed to assess brigatinib in patients with advanced malignancies, particularly ALK-rearranged NSCLC. METHODS: In this ongoing, single-arm, open-label, phase 1/2 trial, we recruited patients from nine academic hospitals or cancer centres in the USA and Spain...
November 7, 2016: Lancet Oncology
https://www.readbyqxmd.com/read/27831835/imaging-of-neurologic-conditions-in-pregnant-patients
#14
Sangam Kanekar, Shante Bennett
A number of physiologic, hormonal, immunologic, and hemodynamic changes take place in the maternal body during pregnancy. The majority of these changes are essential for maintaining the normal course of pregnancy. However, these changes may also cause acute or chronic conditions that affect various biologic systems in the mother. In addition, conditions of the central and peripheral nervous systems can cause a variety of neurologic symptoms and complications. Neurologic signs and symptoms in pregnant and postpartum women may be due to the exacerbation of a preexisting medical condition, the initial manifestation of a primary central nervous system-related problem, or a neurologic problem unique to pregnancy and the postpartum period...
November 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/27818821/disseminated-cerebrospinal-embryonal-tumor-in-the-adult
#15
Alessandro Caporlingua, Daniele Armocida, Federico Caporlingua, Gennaro Lapadula, Grazia Maria Elefante, Manila Antonelli, Maurizio Salvati
Introduction. According to the 2016 World Health Organization classification of Tumors of the Central Nervous System, the term Primitive Neuroectodermal Tumor has been replaced by the term Embryonal Tumor (ET). We present a case of disseminated cerebrospinal ET presenting in an adult patient. Illustrative Case. A 49-year-old male presenting with low back pain, dysuria, and hypoesthesia of the lower extremities referred to our emergency department. Brain and whole spine contrast-enhanced MRI documented a diffusively disseminated heterogeneous neoplasm with intradural extra- and intramedullary involvement of the cervicothoracic tract and cauda equina...
2016: Case Reports in Pathology
https://www.readbyqxmd.com/read/27792315/nuclear-overhauser-enhancement-mediated-magnetization-transfer-imaging-in-glioma-with-different-progression-at-7-t
#16
Xiangyong Tang, Zhuozhi Dai, Gang Xiao, Gen Yan, Zhiwei Shen, Tao Zhang, Guishan Zhang, Zerui Zhuang, Yuanyu Shen, Zhiyan Zhang, Wei Hu, Renhua Wu
Glioma is a malignant neoplasm affecting the central nervous system. The conventional approaches to diagnosis, such as T1-weighted imaging (T1WI), T2-weighted imaging (T2WI), and contrast-enhanced T1WI, give an oversimplified representation of anatomic structures. Nuclear Overhauser enhancement (NOE) imaging is a special form of magnetization transfer (MT) that provides a new way to detect small solute pools through indirect measurement of attenuated water signals, and makes it possible to probe semi-solid macromolecular protons...
October 28, 2016: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/27785399/von-hippel-lindau-disease-the-clinical-manifestations-and-genetic-analysis-results-of-two-cases-from-a-single-family
#17
S Kinyas, S A Ozal, H Guclu, V Gurlu, H Esgin, H Gurkan
von Hippel-Lindau (VHL) disease is an autosomal dominant inherited multi systemic cancer syndrome that is classically associated with neoplasms in multiple organs, and caused by mutations in the VHL gene on chromosome 3p25-p26. Retinal hemangioblastoma (RH) is the most frequent and the earliest clinical sign of the disease, which is seen in 40.0-60.0% of patients. In recent years, studies of patients with VHL tried to put forward the relationship between genotype and phenotype. In this study, two VHL cases in the same family with clinical findings and genetic analysis results are presented...
December 1, 2015: Balkan Journal of Medical Genetics: BJMG
https://www.readbyqxmd.com/read/27769070/characterization-of-pancreatic-glucagon-producing-tumors-and-pituitary-gland-tumors-in-transgenic-mice-overexpressing-mycn-in-hgfap-positive-cells
#18
Kathrin Fielitz, Kristina Althoff, Katleen De Preter, Julie Nonnekens, Jasmin Ohli, Sandra Elges, Wolfgang Hartmann, Günter Klöppel, Thomas Knösel, Marc Schulte, Ludger Klein-Hitpass, Daniela Beisser, Henning Reis, Annette Eyking, Elke Cario, Johannes H Schulte, Alexander Schramm, Ulrich Schüller
Amplification or overexpression of MYCN is involved in development and maintenance of multiple malignancies. A subset of these tumors originates from neural precursors, including the most aggressive forms of the childhood tumors, neuroblastoma and medulloblastoma. In order to model the spectrum of MYCN-driven neoplasms in mice, we transgenically overexpressed MYCN under the control of the human GFAP-promoter that, among other targets, drives expression in neural progenitor cells. However, LSL-MYCN;hGFAP-Cre double transgenic mice did neither develop neural crest tumors nor tumors of the central nervous system, but presented with neuroendocrine tumors of the pancreas and, less frequently, the pituitary gland...
October 19, 2016: Oncotarget
https://www.readbyqxmd.com/read/27757720/evaluation-of-matrix-metalloproteinase-type-iv-collagenases-in-serum-of-patients-with-tumors-of-the-central-nervous-system
#19
Serena Ricci, Elia Guadagno, Dario Bruzzese, Marialaura Del Basso De Caro, Carmela Peca, Francesco G Sgulò, Francesco Maiuri, Angelina Di Carlo
The basement membrane collagen IV-degrading matrix metalloproteinases -2 and -9 (MMPs) are most often linked to the malignant phenotype of tumor cells by playing a critical role in invasion, metastasis, angiogenesis, and vasculogenesis. We verified the activity of these two MMPs in the sera of patients affected by brain tumors (20 gliomas, 28 meningiomas and 20 metastasis) by zymography. The sera of 25 healthy volunteers with no concomitant illnesses were used for controls. Zymography showed four dominant gelatinolytic bands of 240, 130, 92 (MMP-9) and 72 (MMP-2) kDa...
October 18, 2016: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/27713062/intradural-carcinoid-tumor-found-in-a-patient-with-no-history-of-cancer-a-case-report
#20
Jason R Audlin, Gaurav Khullar, Eric M Deshaies, Swamy Kurra, William F Lavelle
BACKGROUND: Carcinoid tumors are rare neoplasms that often arise from the gastrointestinal or respiratory tracts. They often metastasize to bone tissue, as well as pancreatic and hepatic sites. The central nervous system and most specifically the spinal cord are rarely involved. Primary Carcinoid tumors of the CNS are even rarer. CASE DESCRIPTION: A 58 year-old man presented with progressive bilateral lower extremity weakness and a negative history of cancer. Imaging revealed an intradural mass at the L1 and L2 spinal levels...
October 3, 2016: World Neurosurgery
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