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Ependymoma

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https://www.readbyqxmd.com/read/29440180/resistance-promoting-effects-of-ependymoma-treatment-revealed-through-genomic-analysis-of-multiple-recurrences-in-a-single-patient
#1
Christopher A Miller, Sonika Dahiya, Tiandao Li, Robert Fulton, Matthew D Smyth, Gavin P Dunn, Joshua B Rubin, Elaine R Mardis
BACKGROUND: As in other brain tumors, multiple recurrences after complete resection and irradiation of supratentorial ependymoma are common and frequently result in patient death. This standard-of-care treatment was established in the pre-genomic era without the ability to evaluate the effect that mutagenic therapies may exert on tumor evolution and in promoting resistance, recurrence, and death. We seized a rare opportunity to characterize treatment effects and the evolution of a single patient's ependymoma across four recurrences after different therapies...
February 13, 2018: Cold Spring Harbor Molecular Case Studies
https://www.readbyqxmd.com/read/29436365/teaching-case-2-2018-sclerosing-myxopapillary-ependymoma-mimicking-whorling-sclerosing-meningioma
#2
Julia Lang, Thomas Czech, Irene Slavc, Dominik Reisinger, Sophie Bartsch, Johannes A Hainfellner, Christine Haberler, Ellen Gelpi
No abstract text is available yet for this article.
February 13, 2018: Clinical Neuropathology
https://www.readbyqxmd.com/read/29435040/prostate-stem-cell-antigen-is-expressed-in-normal-and-malignant-human-brain-tissues
#3
Hiroe Ono, Hiromi Sakamoto, Teruhiko Yoshida, Norihisa Saeki
Prostate stem cell antigen (PSCA) is a glycosylphosphatidylinositol (GPI)-anchored cell surface protein and exhibits an organ-dependent expression pattern in cancer. PSCA is upregulated in prostate cancer and downregulated in gastric cancer. PSCA is expressed in a variety of human organs. Although certain studies previously demonstrated its expression in the mammalian and avian brain, its expression in the human brain has not been thoroughly elucidated. Additionally, it was previously reported that PSCA is weakly expressed in the astrocytes of the normal human brain but aberrantly expressed in glioma, suggesting that PSCA is a promising target of glioma therapy and prostate cancer therapy...
March 2018: Oncology Letters
https://www.readbyqxmd.com/read/29433337/development-of-a-pre-operative-scoring-system-for-predicting-risk-of-post-operative-paediatric-cerebellar-mutism-syndrome
#4
Jo-Fen Liu, Robert A Dineen, Shivaram Avula, Tom Chambers, Manali Dutta, Tim Jaspan, Donald C MacArthur, Simon Howarth, Daniele Soria, Philip Quinlan, Srikrishna Harave, Chan Chang Ong, Conor L Mallucci, Ram Kumar, Barry Pizer, David A Walker
BACKGROUND: Despite previous identification of pre-operative clinical and radiological predictors of post-operative paediatric cerebellar mutism syndrome (CMS), a unifying pre-operative risk stratification model for use during surgical consent is currently lacking. The aim of the project is to develop a simple imaging-based pre-operative risk scoring scheme to stratify patients in terms of post-operative CMS risk. METHODS: Pre-operative radiological features were recorded for a retrospectively assembled cohort of 89 posterior fossa tumour patients from two major UK treatment centers (age 2-23yrs; gender 28 M, 61 F; diagnosis: 38 pilocytic astrocytoma, 32 medulloblastoma, 12 ependymoma, 1 high grade glioma, 1 pilomyxoid astrocytoma, 1 atypical teratoid rhabdoid tumour, 1 hemangioma, 1 neurilemmoma, 2 oligodendroglioma)...
February 12, 2018: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/29416789/significance-of-cyclin-d1-overexpression-in-progression-and-radio-resistance-of-pediatric-ependymomas
#5
Muh-Lii Liang, Tsung-Han Hsieh, Yun-Ru Liu, Yi-Wei Chen, Yi-Yen Lee, Feng-Chi Chang, Shih-Chieh Lin, Ming-Chao Huang, Ho Donald Ming-Tak, Tai-Tong Wong, Yun Yen, Muh-Hwa Yang
Due to the limited efficacy of chemotherapy, the applications of adjuvant irradiation play an important role for ependymoma treatment. However, in the young ages, the resistance of residual and recurrent tumor, and long-term intellectual sequelae remain the major obstacles of radiotherapy. Understanding the mechanism of therapeutic failure caused by radio-resistance is, therefore, crucial in ependymoma treatment. Here we retrospectively analyze clinic-pathological factors in 82 cases of ependymoma less than 20 years old and identify radio-resistant genes through gene expression microarray followed by qRT-PCR validation and immunohistochemistry staining...
January 5, 2018: Oncotarget
https://www.readbyqxmd.com/read/29413284/brainstem-injury-in-pediatric-patients-with-posterior-fossa-tumors-treated-with-proton-beam-therapy-and-associated-dosimetric-factors
#6
Michelle S Gentile, Beow Y Yeap, Harald Paganetti, Claire P Goebel, Dillon E Gaudet, Sara L Gallotto, Elizabeth A Weyman, Michael L Morgan, Shannon M MacDonald, Drosoula Giantsoudi, Judith Adams, Nancy J Tarbell, Hanne Kooy, Torunn I Yock
PURPOSE: Proton radiation therapy is commonly used in young children with brain tumors for its potential to reduce late effects. However, some proton series report higher rates of brainstem injury (0%-16%) than most photon series (2.2%-8.6%). We report the incidence of brainstem injury and a risk factor analysis in pediatric patients with posterior fossa primary tumors treated with proton radiation therapy at our institution. METHODS AND MATERIALS: The study included 216 consecutive patients treated between 2000 and 2015...
March 1, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29413283/effects-of-proton-center-closure-on-pediatric-case-volume-and-resident-education-at-an-academic-cancer-center
#7
James O Galle, David E Long, Tim Lautenschlaeger, Richard C Zellars, Gordon A Watson, Susannah G Ellsworth
PURPOSE: To analyze effects of closure of an academic proton treatment center (PTC) on pediatric case volume, distribution, and resident education. METHODS AND MATERIALS: This was a review of 412 consecutive pediatric (age ≤18 years) cases treated at a single institution from 2012 to 2016. Residents' Accreditation Council for Graduate Medical Education case logs for the same years were also analyzed. Characteristics of the patient population and resident case volumes before and after closure of the PTC are reported...
March 1, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29408575/supratentorial-cortical-ependymomas-a-retrospective-series-of-13-cases-at-a-single-center
#8
Mengmeng Wang, Rende Zhang, Xueyou Liu, Dongming Li, Peichao Zhao, Yuchao Zuo, Peng Zhang, Junkuan Wang, Hongwei Sun
OBJECTIVE: Cortical ependymomas (CEs), supratentorial ependymoma that selectively involve the cerebral cortex, is relatively rare neoplasm which have not been extensively described. The purpose of our study was to identify the clinical features, radiologic characteristics, and treatment of a series of such tumors. METHODS: Thirteen patients with cortical ependymomas from our hospital were included in this study. Epidemiological characteristics, clinical features, imaging findings, treatment methods and clinical outcomes were reviewed retrospectively...
January 30, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29402569/unusual-paediatric-spinal-myxopapillary-ependymomas-unique-molecular-entities-or-pathological-variations-on-a-theme
#9
Sasha Rogers, David T W Jones, Amanda Ireland, Nick G Gottardo, Raelene Endersby
Ependymomas are the commonest type of spinal glioma which represent a group of relatively benign tumours. Myxopapillary ependymoma (MPE) is a common variant found within the distal spinal cord around the conus. These two entities are clearly differentiated on the basis of their characteristic histological and molecular features. Rare variants of MPE's are described in the literature to have the propensity to metastasise and grow in extraspinal locations despite appearing histologically identical to their more benign relatives...
February 2, 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29397464/recognizing-intraventricular-silicone
#10
Jonathan J Mayl, Miguel A Flores, John W Stelzer, Bo Liu, Steven A Messina, John V Murray
Retinal detachment with subsequent silicone oil retinopexy is not uncommon. A known complication of silicone retinopexy is intraventricular migration of the intraocular silicone oil. While the oil itself does not result in direct pathology, misdiagnosis may lead to an unnecessary diagnostic workup and possibly predispose the patient to surgery intervention. Silicone oil typically appears hyperdense on computer tomography (CT) and hyperintense on T1-weighted magnetic resonance (MR). These imaging findings may mimic a mass or blood products...
February 3, 2018: Emergency Radiology
https://www.readbyqxmd.com/read/29393845/h3-k27m-mutant-gliomas-in-adults-vs-children-share-similar-histological-features-and-adverse-prognosis
#11
Bette K Kleinschmidt-DeMasters, Jean M Mulcahy Levy
BACKGROUND: H3 K27M mutation was originally described in pediatric diffuse intrinsic pontine gliomas (DIPGs), but has been recently recognized to occur also in adult midline diffuse gliomas, as well as midline tumors with other morphologies, including gangliogliomas (GGs), anaplastic GGs, pilocytic astrocytomas (PAs), and posterior fossa ependymomas. In a few patients with H3 K27M-mutant tumors with these alternate morphologies, longer survival has been reported, making grading difficult for the neuropathologist...
February 2, 2018: Clinical Neuropathology
https://www.readbyqxmd.com/read/29393190/pathology-and-genetics-of-gliomas
#12
Takashi Komori, Yoshihiro Muragaki, Mikhail F Chernov
Current World Health Organization (WHO) classification of the neuroepithelial tumors is cell lineage-oriented and based on a presumed developmental tree of the central nervous system (CNS). It defines three main groups of gliomas, namely astrocytomas, oligodendrogliomas, and ependymomas, and additionally presumes their 4-tiered histopathological grading (WHO grades I to IV). Nevertheless, the impact of tumor pathology on clinically related parameters may be frequently much better predicted by genetics, than by histological appearance of the lesion...
2018: Progress in Neurological Surgery
https://www.readbyqxmd.com/read/29383182/transcriptomic-analysis-in-pediatric-spinal-ependymoma-reveals-distinct-molecular-signatures
#13
Anbarasu Lourdusamy, Li Z Luo, Lisa Cd Storer, Kenneth J Cohen, Linda Resar, Richard G Grundy
Pediatric spinal ependymomas (SEPN) are important albeit uncommon malignant central nervous system tumors with limited treatment options. Our current knowledge about the underlying biology of these tumors is limited due to their rarity. To begin to elucidate molecular mechanisms that give rise to pediatric SEPN, we compared the transcriptomic landscape of SEPNs to that of intracranial ependymomas using genome-wide mRNA and microRNA (miRNA) expression profiling in primary tumour samples. We found that pediatric SEPNs are characterized by increased expression of genes involved in developmental processes, oxidative phosphorylation, cellular respiration, electron transport chain, and cofactor metabolic process...
December 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/29380148/real-time-ultrasound-mri-fusion-image-virtual-navigation-for-locating-intraspinal-tumour-in-a-pregnant-woman
#14
Tian-Jian Liu, Fang Shen, Chao Zhang, Pin-Tong Huang, Yong-Jian Zhu
BACKGROUND: Standard fluoroscopic guidance (C-arm fluoroscopy) has been routinely used for intraoperative localization of spinal level for surgical removal of intraspinal tumour, while it is not suitable for selected patients, e.g. pregnant women, who need to avoid radiation exposure. Fusion imaging of real-time ultrasound (US) and magnetic resonance imaging (MRI) is a radiation-free technique which has been reported to have good localization accuracy in managing several conditions. CLINICAL PRESENTATION: A 37-year-old pregnant patient, presented with a progressively aggravating lower back pain for 20 days and was incapable of lying supine with lower extremities swelling for 1 week, was referred to our hospital in her 18th week of gestation...
January 30, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29354850/c11orf95-rela-fusions-and-upregulated-nf-kb-signalling-characterise-a-subset-of-aggressive-supratentorial-ependymomas-that-express-l1cam-and-nestin
#15
Prit Benny Malgulwar, Aruna Nambirajan, Pankaj Pathak, Mohammed Faruq, Madhu Rajeshwari, Manmohan Singh, Vaishali Suri, Chitra Sarkar, Mehar Chand Sharma
Ependymomas (EPN) show site specific genetic alterations and a recent DNA methylation profiling study identified nine molecular subgroups. C11orf95-RELA and YAP1 fusions characterise the RELA and YAP1 molecular subgroups, respectively, of supratentorial (ST)-EPNs. Current guidelines recommend molecular subgrouping over histological grade for accurate prognostication. Clinicopathological features of ST-EPNs in correlation with C11orf95-RELA and YAP1 fusions have been assessed in only few studies. We aimed to study these fusions in EPNs, and identify diagnostic and prognostic markers...
January 22, 2018: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29354756/multifocal-intradural-extramedullary-anaplastic-ependymoma-of-the-spine
#16
Ananya Chakravorty, Ellen Frydenberg, Tint Tint Shein, John Ly, Peter Earls, Timothy Steel
Ependymomas are neuroectodermal tumours arising from the ependymal lining of the ventricles and central canal of the spinal cord. Intradural extramedullary (IDEM) ependymomas which are multifocal, and/or anaplastic (WHO grade III) at presentation are exceedingly rare. We present the second case of multifocal anaplastic IDEM ependymoma in the literature. A 47-year old female presented with left gluteal and thigh pain radiating to the groin associated with paraesthesiae. She had a normal neurological examination...
December 2017: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/29354750/unusual-cauda-equina-syndrome-due-to-multifocal-ependymoma-infiltrated-by-lymphoma
#17
Nassim Bougaci, Stephane Litrico, Fanny Burel-Vandenbos, Philippe Paquis
Myxopapillary ependymoma is a rare tumour of the central nervous system (CNS); this subtype of ependymoma occurs most frequently in cauda equina, conus medullaris or filum terminale. The treatment consists of complete removal of the tumour including its capsule when possible since it is usually a solitary lesion. Non-Hodgkin lymphoma of the CNS is found in only 1.3% of cauda equina tumours. We report the case of a 62-year-old man who presented to our institution with progressive weakness of his right lower extremity, with numbness and paresthesia of both feet...
December 2017: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/29351681/keyhole-contralateral-interhemispheric-endoscopic-assisted-resection-of-an-ependymoma-of-the-third-ventricle
#18
M Yashar S Kalani, Kaan Yagmurlu, Nikolay L Martirosyan, Peter Nakaji
No abstract text is available yet for this article.
February 1, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29350470/specific-expression-of-pd-l1-in-rela-fusion-supratentorial-ependymoma-implications-for-pd-1-targeted-therapy
#19
Davis A Witt, Andrew M Donson, Vladimir Amani, Daniel C Moreira, Bridget Sanford, Lindsey M Hoffman, Michael H Handler, Jean M Mulcahy Levy, Kenneth L Jones, Anandani Nellan, Nicholas K Foreman, Andrea M Griesinger
BACKGROUND: A desperate need for novel therapies in pediatric ependymoma (EPN) exists, as chemotherapy remains ineffective and radiotherapy often fails. EPN have significant infiltration of immune cells, which correlates with outcome. Immune checkpoint inhibitors provide an avenue for new treatments. This study characterizes tumor-infiltrating immune cells in EPN and aims at predicting candidates for clinical trials using checkpoint inhibitors targeting PD-L1/PD-1 (programmed death ligand 1/programmed death 1)...
January 19, 2018: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/29333005/prognostic-factors-and-survival-outcomes-of-intracranial-ependymoma-treated-with-multimodality-approach
#20
Kunhi Parambath Haresh, Ajeet Kumar Gandhi, Supriya Mallick, Rony Benson, Subhash Gupta, Daya Nand Sharma, Pramod Kumar Julka, Goura Kisor Rath
Objectives: We aimed to analyze treatment outcomes of intracranial ependymoma (ICE) treated at our institute with multimodality approach. Materials and Methods: Demography, treatment details, and survival data of 40 patients (2005-2012) were collected in a predesigned pro forma. Kaplan Meier method was used to analyze disease-free survival (DFS) and the impact of prognostic factors was determined using univariate analysis (log-rank test). Multivariate analysis was performed using Cox-proportional hazard model...
October 2017: Indian Journal of Medical and Paediatric Oncology
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