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Oligodendroglioma

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https://www.readbyqxmd.com/read/27903792/clinical-effectiveness-of-bevacizumab-in-patients-with-recurrent-brain-tumours-a-population-based-evaluation
#1
REVIEW
Mário L de Lemos, Adeline Markarian, Esther Chan, Kimberly Schaff, Susan Walisser
BACKGROUND: Bevacizumab is an antiangiogenic agent active in patients with recurrent malignant gliomas. However, evidence for its clinical efficacy is relatively limited so that bevacizumab is approved for this indication in Canada and the United States, but not in the European Union. We reviewed the effectiveness of bevacizumab in patients with recurrent brain tumour using a large population database. METHODS: This was a retrospective, multicentre, study conducted at the BC Cancer Agency, a public cancer care organisation for the residents of the Canadian province of British Columbia...
November 30, 2016: Journal of Oncology Pharmacy Practice
https://www.readbyqxmd.com/read/27900202/radiological-imaging-features-of-glioblastoma-with-oligodendroglioma-component-a-comparison-with-conventional-glioblastoma
#2
Masafumi Kanoto, Kazukuni Kirii, Yuuki Toyoguchi, Masashi Nishihara, Keita Sakurai, Kazuhiro Murayama, Tomoyuki Noguchi, Kenichiro Matsuda, Kaori Sakurada, Yukihiko Sonoda, Takaaki Hosoya
BACKGROUND: Glioblastoma with oligodendroglioma component (GBMO) is a subtype of conventional glioblastoma (cGBM), which is categorized as WHO grade IV. GBMO can be histopathologically distinguished from cGBM and the prognosis of GBMO is better than that of cGBM. However, no systematic review of GBMO imaging findings has been published to date. PURPOSE: To clarify the radiological imaging features of GBMO compared with those of cGBM. MATERIAL AND METHODS: The participants were 15 patients with GBMO and 32 patients with cGBM as a control group, all of whom were histopathologically diagnosed...
November 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27895504/deferred-radiotherapy-and-upfront-procarbazine-acnu-vincristine-administration-for-1p19q-codeleted-oligodendroglial-tumors-are-associated-with-favorable-outcome-without-compromising-patient-performance-regardless-of-who-grade
#3
Nobuhiro Hata, Koji Yoshimoto, Ryusuke Hatae, Daisuke Kuga, Yojiro Akagi, Satoshi O Suzuki, Toru Iwaki, Tadahisa Shono, Masahiro Mizoguchi, Koji Iihara
Recently updated phase III trials revealed the favorable effect of add-on procarbazine-lomustine-vincristine chemotherapy (CT) to radiotherapy (RT) in treating anaplastic oligodendrogliomas with 1p19q codeletion (codel). However, the underlying rationality of deferring RT and upfront CT administration for these tumors is yet to be elucidated. Here, we retrospectively analyzed the long-term outcome of our case series with oligodendroglial tumors treated with deferred RT and upfront procarbazine+nimustine+vincristine (PAV) in the introduction administration...
2016: OncoTargets and Therapy
https://www.readbyqxmd.com/read/27895359/awake-craniotomy-for-brain-tumours-in-pakistan-an-initial-case-series-from-a-developing-country
#4
Saad Akhtar Khan, Karim Rizwan Nathani, Badar Uddin Ujjan, Muhammad Danish Barakzai, Syed Ather Enam, Faraz Shafiq
Awake craniotomy offers safe resection of brain tumours in eloquent area. Aga Khan University Hospital, Karachi, recently started the programme in Pakistan, and the current study was planned to assess our experience of the first 16 procedures. The retrospective study comprised all such procedures done from November 2015 to May 2016. Pre-operative and post-operative variables were analysed. Of the 16 patients, 11(68.75%) were males and 5(31.25%) were females. The overall median age was 37 years (interquartile range[IQR]: 23-62 years)...
October 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27893285/recent-advances-in-subtyping-tumors-of-the-central-nervous-system-using-molecular-data
#5
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/27874063/cns-cancer-tracing-stem-cells-in-oligodendroglioma
#6
Diana Romero
No abstract text is available yet for this article.
November 22, 2016: Nature Reviews. Clinical Oncology
https://www.readbyqxmd.com/read/27867928/world-health-organization-grade-ii-oligodendroglioma-occurring-after-successful-treatment-for-childhood-acute-lymphoblastic-leukemia
#7
Sang-In Yoon, Kyung-Jae Park, Dong-Hyuk Park, Shin-Hyuk Kang, Jung-Yul Park, Yong-Gu Chung
When treating childhood acute lymphoblastic leukemia (ALL), secondary neoplasms are a significant long term problem. Radiation is generally accepted to be a major cause of the development of secondary neoplasms. Following treatment for ALL, a variety of secondary tumors, including brain tumors, hematologic malignancies, sarcomas, thyroid cancers, and skin cancers have been reported. However, oligodendroglioma as a secondary neoplasm is extremely rare. Herein we present a case of secondary oligodendroglioma occurring 13 years after the end of ALL treatment...
October 2016: Brain Tumor Research and Treatment
https://www.readbyqxmd.com/read/27864704/a-clinicopathologic-study-of-extraventricular-neurocytoma
#8
Li Xu, Zhaolian Ouyang, Junmei Wang, Zhaoxia Liu, Jingyi Fang, Jiang Du, Yanjiao He, Guilin Li
In 2007, extraventricular neurocytoma was classified as a separate entity among glioneuronal tumors. However, extraventricular neurocytoma is not fully understood and may be misdiagnosed. Here, we describe the clinical and pathological features, prognoses, and treatments of 13 extraventricular neurocytoma cases, and compare their immunophenotypes with those of oligodendroglioma, diffuse astrocytoma, and ependymoma. Six typical and 7 atypical cases comprised the 13 extraventricular neurocytoma cases. Histological features included oligodendroglioma-like perinuclear halo, neuropil-like matrix, ganglion or ganglioid cells, perivascular pseudorosettes, vessel hyalinization, calcifications, and myxoid degeneration...
November 18, 2016: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/27864226/pinpointing-cancer-stem-cells-in-oligodendroglioma
#9
(no author information available yet)
Through single-cell RNA sequencing of low-grade oligodendrogliomas, researchers have identified a cell population featuring a gene expression signature similar to those of neural stem and progenitor cells. These cancer stem cells have enriched proliferative potential and may be responsible for fueling the growth of this glioma subtype.
November 18, 2016: Cancer Discovery
https://www.readbyqxmd.com/read/27862886/molecular-characterization-reveals-nf1-deletions-and-fgfr1-activating-mutations-in-a-pediatric-spinal-oligodendroglioma
#10
Amy K Bruzek, Andrew H Zureick, Paul E McKeever, Hugh J L Garton, Patricia L Robertson, Rajen Mody, Carl J Koschmann
Pediatric spinal oligodendrogliomas are rare and aggressive tumors. They do not share the same molecular features of adult oligodendroglioma, and no previous reports have examined the molecular features of pediatric spinal oligodendroglioma. We present the case of a child with a recurrent spinal anaplastic oligodendroglioma. We performed whole exome (paired tumor and germline DNA) and transcriptome (tumor RNA) sequencing, which revealed somatic mutations in NF1 and FGFR1. These data allowed us to explore potential personalized therapies for this patient and expose molecular drivers that may be involved in similar cases...
November 10, 2016: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/27821709/proceedings-of-the-2016-national-toxicology-program-satellite-symposium
#11
Susan A Elmore, Vivian S Chen, Schantel Hayes-Bouknight, Jessica S Hoane, Kyathanahalli Janardhan, Linda H Kooistra, Thomas Nolte, Kathleen A Szabo, Gabrielle A Willson, Jeffrey C Wolf, David E Malarkey
The 2016 annual National Toxicology Program Satellite Symposium, entitled "Pathology Potpourri" was held in San Diego, CA, at the Society of Toxicologic Pathology's (STP) 35th annual meeting. The goal of this symposium was to present and discuss challenging diagnostic pathology and/or nomenclature issues. This article presents summaries of the speakers' talks, along with select images that were used by the audience for voting and discussion. Some lesions and topics covered during the symposium included malignant glioma and histiocytic sarcoma in the rodent brain; a new statistical method designed for histopathology data evaluation; uterine stromal/glandular polyp in a rat; malignant plasma cell tumor in a mouse brain; Schwann cell proliferative lesions in rat hearts; axillary schwannoma in a cat; necrosis and granulomatous inflammation in a rat brain; adenoma/carcinoma in a rat adrenal gland; hepatocyte maturation defect and liver/spleen hematopoietic defects in an embryonic mouse; distinguishing malignant glioma, malignant mixed glioma, and malignant oligodendroglioma in the rat; comparison of mammary gland whole mounts and histopathology from mice; and discussion of the International Harmonization of Nomenclature and Diagnostic Criteria collaborations...
November 7, 2016: Toxicologic Pathology
https://www.readbyqxmd.com/read/27812792/polymorphous-low-grade-neuroepithelial-tumor-of-the-young-plnty-an-epileptogenic-neoplasm-with-oligodendroglioma-like-components-aberrant-cd34-expression-and-genetic-alterations-involving-the-map-kinase-pathway
#12
Jason T Huse, Matija Snuderl, David T W Jones, Carole D Brathwaite, Nolan Altman, Ehud Lavi, Richard Saffery, Alexandra Sexton-Oates, Ingmar Blumcke, David Capper, Matthias A Karajannis, Ryma Benayed, Lukas Chavez, Cheddhi Thomas, Jonathan Serrano, Laetitia Borsu, Marc Ladanyi, Marc K Rosenblum
Epileptogenic tumors affecting children and young adults are a morphologically diverse collection of neuroepithelial neoplasms that, as a group, exhibit varying levels of glial and/or neuronal differentiation. Recent advances in molecular profiling technology, including comprehensive DNA sequencing and methylation analysis, have enabled the application of more precise and biologically relevant classification schemes to these tumors. In this report, we describe a morphologically and molecularly distinct epileptogenic neoplasm, the polymorphous low-grade neuroepithelial tumor of the young (PLNTY), which likely accounts for a sizable portion of oligodendroglioma-like tumors affecting the pediatric population...
November 3, 2016: Acta Neuropathologica
https://www.readbyqxmd.com/read/27806376/single-cell-rna-seq-supports-a-developmental-hierarchy-in-human-oligodendroglioma
#13
Itay Tirosh, Andrew S Venteicher, Christine Hebert, Leah E Escalante, Anoop P Patel, Keren Yizhak, Jonathan M Fisher, Christopher Rodman, Christopher Mount, Mariella G Filbin, Cyril Neftel, Niyati Desai, Jackson Nyman, Benjamin Izar, Christina C Luo, Joshua M Francis, Aanand A Patel, Maristela L Onozato, Nicolo Riggi, Kenneth J Livak, Dave Gennert, Rahul Satija, Brian V Nahed, William T Curry, Robert L Martuza, Ravindra Mylvaganam, A John Iafrate, Matthew P Frosch, Todd R Golub, Miguel N Rivera, Gad Getz, Orit Rozenblatt-Rosen, Daniel P Cahill, Michelle Monje, Bradley E Bernstein, David N Louis, Aviv Regev, Mario L Suvà
Although human tumours are shaped by the genetic evolution of cancer cells, evidence also suggests that they display hierarchies related to developmental pathways and epigenetic programs in which cancer stem cells (CSCs) can drive tumour growth and give rise to differentiated progeny. Yet, unbiased evidence for CSCs in solid human malignancies remains elusive. Here we profile 4,347 single cells from six IDH1 or IDH2 mutant human oligodendrogliomas by RNA sequencing (RNA-seq) and reconstruct their developmental programs from genome-wide expression signatures...
November 2, 2016: Nature
https://www.readbyqxmd.com/read/27796734/diagnostic-revision-of-206-adult-gliomas-including-40-oligoastrocytomas-based-on-atrx-idh1-2-and-1p-19q-status
#14
Marta Mellai, Laura Annovazzi, Rebecca Senetta, Carmine Dell'Aglio, Marta Mazzucco, Paola Cassoni, Davide Schiffer
The diagnosis of 206 low and high grade adult gliomas, including 40 oligoastrocytomas, was revised based on the immunohistochemical reactivity for the ATRX protein, IDH1/2 mutation status and 1p/19q chromosomal status. All oligodendrogliomas kept the initial diagnosis. Astrocytomas did not change diagnosis in 30 of 36 cases (83.3 %); four of 36 (11.1 %) cases were reclassified as oligodendroglioma, one (2.8 %) as DNT and the other (2.8 %) as reactive gliosis. Oligoastrocytomas changed diagnosis in 35 of 40 (87...
October 28, 2016: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/27793055/personalized-anticancer-therapy-selection-using-molecular-landscape-topology-and-thermodynamics
#15
Edward A Rietman, Jacob G Scott, Jack A Tuszynski, Giannoula Lakka Klement
Personalized anticancer therapy requires continuous consolidation of emerging bioinformatics data into meaningful and accurate information streams. The use of novel mathematical and physical approaches, namely topology and thermodynamics can enable merging differing data types for improved accuracy in selecting therapeutic targets. We describe a method that uses chemical thermodynamics and two topology measures to link RNA-seq data from individual patients with academically curated protein-protein interaction networks to select clinically relevant targets for treatment of low-grade glioma (LGG)...
October 26, 2016: Oncotarget
https://www.readbyqxmd.com/read/27791984/droplet-digital-pcr-is-a-powerful-technique-to-demonstrate-frequent-fgfr1-duplication-in-dysembryoplastic-neuroepithelial-tumors
#16
Frédéric Fina, Doriane Barets, Carole Colin, Corinne Bouvier, Laëtitia Padovani, Isabelle Nanni-Metellus, L'Houcine Ouafik, Didier Scavarda, Andrey Korshunov, David T W Jones, Dominique Figarella-Branger
Dysembryoplastic neuroepithelial tumors (DNT) share V600E mutation in the BRAF gene with other low grade neuroepithelial tumors (LGNTs). FGFR1 internal tandem duplication of the tyrosine-kinase domain (FGFR1-ITD), another genetic alteration that also leads to MAP kinase pathway alteration, has been previously reported in LGNTs by whole-genome sequencing. In the present study we searched for FGFR1-ITD by droplet digital PCR (DDPCR™) and for FGFR1 point mutations by HRM-sequencing in a series of formalin-fixed paraffin-embedded (FFPE) LGNTs including 12 DNT, 2 oligodendrogliomas lacking IDH mutation and 1p/19q co- deletion (pediatric-type oligodendrogliomas; PTOs), 3 pediatric diffuse astrocytomas (PDAs), 14 gangliogliomas (GGs) and 5 pilocytic astrocytomas (PAs)...
October 25, 2016: Oncotarget
https://www.readbyqxmd.com/read/27780605/idh1-2-gene-hotspot-mutations-in-central-nervous-system-tumours-analysis-of-922-chinese-patients
#17
Ni Chen, Tianpin Yu, Jing Gong, Ling Nie, Xueqin Chen, Mengni Zhang, Miao Xu, Junya Tan, Zhengzheng Su, Jinjing Zhong, Qiao Zhou
Mutations of isocitrate dehydrogenase 1 (IDH1) or 2 (IDH2) genes have been identified as early molecular events in the development of astrocytomas and oligodendrogliomas. Data regarding the status and prevalence of IDH1/2 mutations in Chinese patients are limited. Herein we report our data from West China Hospital, a major Chinese medical centre. IDH1(R132H) mutation was analysed by immunohistochemistry with the mutation-specific IDH1(R132H) antibody in 1011 patients, including 922 central nervous system (CNS) tumours and 89 non-neoplastic CNS lesions, and PCR-based direct sequencing of IDH1/2 gene mutation in 570 of these samples...
October 22, 2016: Pathology
https://www.readbyqxmd.com/read/27764513/heterogeneity-of-histopathological-presentation-of-pilocytic-astrocytoma-diagnostic-pitfalls-a-review
#18
E Matyja, W Grajkowska, K Stępień, E Naganska
Pilocytic astrocytomas (PAs) are the most frequent primary astroglial tumours affecting children and adolescents. They occur sporadically or in association with a genetically determined syndrome - neurofibromatosis type 1. Classic PA usually manifests as a well-circumscribed, often cystic, slowly growing tumour, which corresponds to WHO grade I. The majority of pilocytic tumours arise along the neuraxis, predominantly in the cerebellum. They are associated with favourable long-term outcome or spontaneous regression, even after incomplete resection...
2016: Folia Neuropathologica
https://www.readbyqxmd.com/read/27753657/a-comparative-immunohistochemical-study-of-epithelial-membrane-antigen-and-nherf1-ebp50-in-the-diagnosis-of-ependymomas
#19
Aruna Nambirajan, Mehar C Sharma, Madhu Rajeshwari, Aanchal Kakkar, Vaishali Suri, Chitra Sarkar
Ependymomas are gliomas that recapitulate normal ependymal cells. The epithelial membrane antigen (EMA) shows "dot-like" and "ring-like" staining patterns, highlighting "microlumens" or intracytoplasmic rosettes, a pathognomonic ultrastructural feature. NHERF1/EBP50, an adaptor protein localized at the apical plasma membrane of human epithelia, has been found to localize to these microlumens. We aimed to analyze the staining patterns of EMA and EBP50 in ependymomas and other tumors, and thereby compare their diagnostic utility...
October 7, 2016: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/27738816/granular-cells-in-oligodendroglioma-suggest-a-neoplastic-change-rather-than-a-reactive-phenomenon-case-report-with-molecular-characterisation
#20
Shilpa Rao, Palavalasa Sravya, Chitra Chandran, Jitender Saini, Sampath Somanna, Vani Santosh
Oligodendrogliomas are diffuse gliomas characterised by IDH mutation and 1p/19q co-deletion. Classical oligodendrocytes, minigemistocytes, gliofibrillary oligodendrocytes, granular cells, and mucocytes are morphologic cell types described in oligodendroglioma. Even though the occurrence of granular cells in oligodendroglioma is known, exact nature of these cells and their molecular characteristics remain undetermined. We describe a case of oligodendroglioma with granular cells, in which we have attempted to molecularly characterise the granular cells...
October 13, 2016: Brain Tumor Pathology
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