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https://www.readbyqxmd.com/read/28867358/radiation-induced-large-vessel-cerebral-vasculopathy-in-pediatric-patients-with-brain-tumors-treated-with-proton-radiation-therapy
#1
Stephen F Kralik, Gordon A Watson, Chie-Schin Shih, Chang Y Ho, Whitney Finke, Jeffrey Buchsbaum
PURPOSE: The purpose of this research was to evaluate the incidence, time to development, imaging patterns, risk factors, and clinical significance of large vessel cerebral vasculopathy in pediatric patients with brain tumors treated with proton radiation therapy. METHODS AND MATERIALS: A retrospective study was performed on 75 consecutive pediatric patients with primary brain tumors treated with proton radiation therapy. Radiation-induced large vessel cerebral vasculopathy (RLVCV) was defined as intracranial large vessel arterial stenosis or occlusion confirmed on magnetic resonance angiography, computed tomographic angiography, catheter angiography, or a combination of these within an anatomic region with previous exposure to proton beam therapy and not present before radiation therapy...
July 12, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28783147/marrow-ablative-chemotherapy-followed-by-tandem-autologous-hematopoietic-cell-transplantation-in-pediatric-patients-with-malignant-brain-tumors
#2
J A Guerra, G Dhall, A Marachelian, E Castillo, J Malvar, K Wong, R Sposto, J L Finlay
To improve survival in young children with malignant brain tumors, irradiation-avoiding or -minimizing marrow-ablative chemotherapy (HDCx) with autologous hematopoietic cell transplantation (AuHCT) has been investigated. We evaluated the outcome of 44 children with malignant brain tumors treated with HDCx and tandem AuHCT at Children's Hospital Los Angeles between June 1999 and July 2012. Forty-four children with malignant brain tumors were studied. Twenty-one had medulloblastoma/primitive neuro-ectodermal tumor, eight atypical teratoid/rhabdoid tumor (ATRT), five high-grade glioma, four malignant germ cell tumor, three ependymoma and three choroid plexus carcinoma...
August 7, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28731919/a-case-presentation-rare-occurrence-of-an-adolescent-male-presenting-with-an-atrt-and-simultaneous-low-grade-glioneuronal-tumor
#3
Matthew Cascio, Marie Rivera-Zengotita, John Fort
Atypical rhabdoid/teratoid tumor (ATRT) is an uncommon and highly malignant tumor of the central nervous system. The majority of ATRT tumors occur in infancy and young children located in the posterior fossa. The ideal treatment for cure remains controversial and prognosis is typically unfavorable. We present a case of an atypical presentation of ATRT, presenting in adolescence with an additional low-grade glioneuronal tumor discovered at diagnosis.
July 20, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28676785/atypical-teratoid-rhabdoid-tumor-two-case-reports-and-an-analysis-of-adult-cases-with-implications-for-pathophysiology-and-treatment
#4
Christopher Dardis, Jared Yeo, Kelly Milton, Lynn S Ashby, Kris A Smith, Shwetal Mehta, Emad Youssef, Jenny Eschbacher, Kathy Tucker, Laughlin Dawes, Neil Lambie, Elizabeth Algar, Elizabeth Hovey
We present the first quantitative analysis of atypical teratoid rhabdoid tumors (ATRT) in adults, including two patients from our own institutions. These are of interest as one occurred during pregnancy and one is a long-term survivor. Our review of pathological findings of 50 reported cases of adult ATRT leads us to propose a solely ectodermal origin for the tumor and that epithelial-mesenchymal transition (EMT) is a defining feature. Thus, the term ATRT may be misleading. Our review of clinical findings shows that ATRT tends to originate in mid-line structures adjacent to the CSF, leading to a high rate of leptomeningeal dissemination...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28616426/cytologic-diagnosis-of-atypical-teratoid-rhabdoid-tumor-based-on-touch-imprint-study-report-of-a-case-with-review-of-literature
#5
Mansoureh Shokripour, Negar Azarpira, Navid Omidifar, Bita Pakniat
Atypical teratoid rhabdoid tumor (ATRT) is a rare malignant tumor with gloom destiny. Our case was a 4-year-old boy with a temporal lobe tumor that was then became evident of ATRT with recurrent happening. In a retrospective review of all cytologic slides, we found unique rhabdoid cells that are morphologically evident cells for ATRT in both times. Unfortunately, the cells were overlooked at the first time. We conclude if the pathologist is experienced to see rhabdoid cells noticing these cells is highly helpful for diagnosis ATRT, especially in frozen sectioning...
2017: Journal of Education and Health Promotion
https://www.readbyqxmd.com/read/28598565/atypical-teratoid-rhabdoid-tumors-in-children-treated-with-multimodal-therapies-the-necessity-of-upfront-radiotherapy-after-surgery
#6
Jeongshim Lee, Dong-Seok Kim, Jung Woo Han, Chang-Ok Suh
BACKGROUND: Atypical teratoid/rhabdoid tumor (ATRT) is a rare malignant pediatric brain tumor with a dismal prognosis. We evaluated the efficacy of multimodal therapy in children with ATRT. PROCEDURE: Nine children diagnosed with cranial ATRT, who received multimodal therapy between 2005 and 2014, including surgical resection followed by radiotherapy (RT), systemic chemotherapy (CT), and high-dose chemotherapy/stem cell transplantation (HDCT/SCT), were analyzed retrospectively...
June 9, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28469334/clinical-profile-of-pediatric-oncology-patients-treated-by-external-beam-radiotherapy-an-institutional-experience
#7
Virender Suhag, B S Sunita, Pankaj Vats, Arti Sarin, A K Singh, Mayuri Jain
INTRODUCTION: Pediatric tumors are a heterogeneous group of malignant conditions requiring multimodal treatment, and management of such cases is at time challenging. We present the clinical profile of pediatric cancer patients who received radiation, either alone or as adjuvant to surgery and chemotherapy; in prophylactic, radical or palliative clinical setting. AIM: This study was envisaged to review our experience of pediatric oncology cases, their clinical and morphological profile, dosage schedule of radiotherapy, and the therapy induced complications...
January 2017: Indian Journal of Medical and Paediatric Oncology
https://www.readbyqxmd.com/read/28461278/does-stereotactic-radiosurgery-positively-impact-the-local-control-of-atypical-teratoid-rhabdoid-tumors
#8
REVIEW
Alfio Spina, Filippo Gagliardi, Nicola Boari, Michele Bailo, Pietro Mortini
BACKGROUND: Atypical teratoid rhabdoid tumors (ATRTs) are rare and aggressive tumors, usually affecting patients younger than 3 years of age, that are characterized by a poor prognosis. Nowadays multimodal management, including surgery, chemotherapy and radiation therapy (RT), is advocated depending on the patients' age and tumor stage, even if no consensus exists regarding the best treatment modality. Local RT seems to be the most effective treatment in prolonging progression-free and overall survival rates, although RT might not be used on younger children because of the risk of neurocognitive and endocrine sequelae...
August 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28458948/primary-atypical-teratoid-rhabdoid-tumor-in-the-adult-spine
#9
Michael McGinity, Huma Siddiqui, Gulpreet Singh, Fermin Tio, Ahmed Shakir
BACKGROUND: Atypical teratoid/rhabdoid tumor (ATRT) is a highly aggressive tumor of the central nervous system (WHO grade IV), which is most frequently found intracranially in young children and infants. Only three prior cases of primary ATRT involving the adult spine were found following a literature review, and the average survival for these patients was only 20 postoperative months. CASE DESCRIPTION: A 43 year-old female presented with an acute exacerbation of chronic neck pain...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28442586/therapeutic-targeting-of-ptk7-is-cytotoxic-in-atypical-teratoid-rhabdoid-tumors
#10
Shanta M Messerli, Mariah M Hoffman, Etienne Z Gnimpieba, Ratan D Bhardwaj
Novel discoveries involving the evaluation of potential therapeutics are based on newly identified molecular targets for atypical teratoid rhabdoid tumors (ATRT), which are the most common form of infantile brain tumors. Central nervous system ATRTs are rare, aggressive, and fast growing tumors of the brain and spinal cord and carry a very poor prognosis. Currently, the standard of care for ATRT patients is based on surgical resection followed by systemic chemotherapy and radiotherapy, which result in severe side effects...
August 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28382842/ewing-sarcoma-and-atypical-teratoid-rhabdoid-tumor-a-fish-and-immunohistochemical-comparison
#11
M Cristina Pacheco, Michelle Dolan, Anne Bendel
Ewing sarcoma (ES) and atypical teratoid rhabdoid tumor (ATRT) are high-grade malignancies of childhood, each of which is associated with genetic abnormalities on chromosome 22. ES is typically characterized by rearrangement of the EWSR1 locus and ATRT by deletion of SMARCB1. We report a case with an unusual fluorescence in situ hybridization signal pattern consistent with EWSR1 rearrangement that was shown to have loss of INI1 expression by immunohistochemistry due to deletion in the long arm of one chromosome 22...
September 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28291373/neoadjuvant-chemotherapy-for-atypical-teratoid-rhabdoid-tumors-case-report
#12
Meena Thatikunta, Ian Mutchnick, Jennifer Elster, Matthew P Thompson, Michael A Huang, Aaron C Spalding, Thomas Moriarty
Atypical teratoid rhabdoid tumors (ATRTs) are a rare pediatric brain tumor with high mortality rate. Several large series have reported achieving gross-total resection (GTR) in less than 50% of patients due to the lesions' large size, vascularity, and limited blood volume in young patients. While neoadjuvant chemotherapy for choroid plexus carcinomas in pediatric patients has become widely accepted, it has not been used as widely for other pediatric brain tumors. To the best of the authors' knowledge, there are only 3 published cases of neoadjuvant chemotherapy for ATRTs...
May 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28108836/smad-dependent-signaling-plays-a-detrimental-role-in-a-fly-model-of-smarcb1-deficiency-and-the-biology-of-atypical-teratoid-rhabdoid-tumors
#13
Astrid Jeibmann, Jacqueline Schulz, Kristin Eikmeier, Pascal D Johann, Katharina Thiel, Isabel Tegeder, Oliver Ambrée, Michael C Frühwald, Stefan M Pfister, Marcel Kool, Werner Paulus, Martin Hasselblatt
Atypical teratoid/rhabdoid tumors (ATRT) are highly malignant brain tumors arising in young children. The majority of ATRT is characterized by inactivation of the chromatin remodeling complex member SMARCB1 (INI1/hSNF5). Little is known, however, on downstream pathways involved in the detrimental effects of SMARCB1 deficiency which might also represent targets for treatment. Using Drosophila melanogaster and the Gal4-UAS system, modifier screens were performed in order to identify the role of SMAD dependent signaling in the lethal phenotype associated with knockdown of snr1, the fly homolog of SMARCB1...
January 20, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28102486/atypical-teratoid-rhabdoid-tumor-in-the-first-year-of-life-the-canadian-atrt-registry-experience-and-review-of-the-literature
#14
Mary Fossey, Haocheng Li, Samina Afzal, Anne-Sophie Carret, David D Eisenstat, Adam Fleming, Juliette Hukin, Cynthia Hawkins, Nada Jabado, Donna Johnston, Tania Brown, Valerie Larouche, Katrin Scheinemann, Douglas Strother, Beverly Wilson, Shayna Zelcer, Annie Huang, Eric Bouffet, Lucie Lafay-Cousin
While 2/3 of patients with ATRT are less than 3 years at diagnosis, the literature suggests younger children present with more aggressive disease and poorer outcome. However, little data exist on characteristics and outcome of patients diagnosed with ATRT in the first year of life. In particular, it is unclear whether they access similar treatments as do older children. We compared the cohort of patients ≤12 months from the Canadian ATRT registry to all cases extracted from the literature reported between 1996 and 2014 to describe their clinical and treatment characteristics, and potential prognostic factors...
March 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28025236/otx2-defines-a-subgroup-of-atypical-teratoid-rhabdoid-tumors-with-close-relationship-to-choroid-plexus-tumors
#15
Anna Sophia Japp, Ludger Klein-Hitpass, Dorota Denkhaus, Torsten Pietsch
Atypical teratoid rhabdoid tumors (ATRT) are highly malignant brain tumors of early childhood that have been regarded as a homogenous entity characterized by inactivation of the SMARCB1/INI1 or SMARCA4/BRG1 genes as the only characteristic alteration. Recent studies suggest that similar to other embryonal tumors ATRT can also be divided into subgroups based on their mRNA or methylation profiles. Using microarray-based expression analysis of 12 patient ATRT specimens we demonstrated the existence of 2 subgroups of ATRT...
January 1, 2017: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/27960086/integrated-epi-genomic-analyses-identify-subgroup-specific-therapeutic-targets-in-cns-rhabdoid-tumors
#16
Jonathon Torchia, Brian Golbourn, Shengrui Feng, King Ching Ho, Patrick Sin-Chan, Alexandre Vasiljevic, Joseph D Norman, Paul Guilhamon, Livia Garzia, Natalia R Agamez, Mei Lu, Tiffany S Chan, Daniel Picard, Pasqualino de Antonellis, Dong-Anh Khuong-Quang, Aline C Planello, Constanze Zeller, Dalia Barsyte-Lovejoy, Lucie Lafay-Cousin, Louis Letourneau, Mathieu Bourgey, Man Yu, Deena M A Gendoo, Misko Dzamba, Mark Barszczyk, Tiago Medina, Alexandra N Riemenschneider, A Sorana Morrissy, Young-Shin Ra, Vijay Ramaswamy, Marc Remke, Christopher P Dunham, Stephen Yip, Ho-Keung Ng, Jian-Qiang Lu, Vivek Mehta, Steffen Albrecht, Jose Pimentel, Jennifer A Chan, Gino R Somers, Claudia C Faria, Lucia Roque, Maryam Fouladi, Lindsey M Hoffman, Andrew S Moore, Yin Wang, Seung Ah Choi, Jordan R Hansford, Daniel Catchpoole, Diane K Birks, Nicholas K Foreman, Doug Strother, Almos Klekner, Laszló Bognár, Miklós Garami, Péter Hauser, Tibor Hortobágyi, Beverly Wilson, Juliette Hukin, Anne-Sophie Carret, Timothy E Van Meter, Eugene I Hwang, Amar Gajjar, Shih-Hwa Chiou, Hideo Nakamura, Helen Toledano, Iris Fried, Daniel Fults, Takafumi Wataya, Chris Fryer, David D Eisenstat, Katrin Scheinemann, Adam J Fleming, Donna L Johnston, Jean Michaud, Shayna Zelcer, Robert Hammond, Samina Afzal, David A Ramsay, Nongnuch Sirachainan, Suradej Hongeng, Noppadol Larbcharoensub, Richard G Grundy, Rishi R Lulla, Jason R Fangusaro, Harriet Druker, Ute Bartels, Ronald Grant, David Malkin, C Jane McGlade, Theodore Nicolaides, Tarik Tihan, Joanna Phillips, Jacek Majewski, Alexandre Montpetit, Guillaume Bourque, Gary D Bader, Alyssa T Reddy, G Yancey Gillespie, Monika Warmuth-Metz, Stefan Rutkowski, Uri Tabori, Mathieu Lupien, Michael Brudno, Ulrich Schüller, Torsten Pietsch, Alexander R Judkins, Cynthia E Hawkins, Eric Bouffet, Seung-Ki Kim, Peter B Dirks, Michael D Taylor, Anat Erdreich-Epstein, Cheryl H Arrowsmith, Daniel D De Carvalho, James T Rutka, Nada Jabado, Annie Huang
We recently reported that atypical teratoid rhabdoid tumors (ATRTs) comprise at least two transcriptional subtypes with different clinical outcomes; however, the mechanisms underlying therapeutic heterogeneity remained unclear. In this study, we analyzed 191 primary ATRTs and 10 ATRT cell lines to define the genomic and epigenomic landscape of ATRTs and identify subgroup-specific therapeutic targets. We found ATRTs segregated into three epigenetic subgroups with distinct genomic profiles, SMARCB1 genotypes, and chromatin landscape that correlated with differential cellular responses to a panel of signaling and epigenetic inhibitors...
December 12, 2016: Cancer Cell
https://www.readbyqxmd.com/read/27889024/brain-tumors-in-the-neonate
#17
REVIEW
Karuna V Shekdar, Erin Simon Schwartz
Brain tumors can develop in the prenatal and neonatal time periods. Neuroimaging studies are crucial for the early detection of prenatal and neonatal brain tumors. Imaging allows for characterization of morphology, as well as the detection of hydrocephalus, local invasion, and distant spread. The imaging features of the more common neonatal brain tumors, including teratomas, choroid plexus tumors, ATRTs, and neoplasm mimics are described.
February 2017: Neuroimaging Clinics of North America
https://www.readbyqxmd.com/read/27861763/assessment-of-the-treatment-approach-and-survival-outcomes-in-a-modern-cohort-of-patients-with-atypical-teratoid-rhabdoid-tumors-using-the-national-cancer-database
#18
Benjamin W Fischer-Valuck, Ishita Chen, Amar J Srivastava, John M Floberg, Yuan James Rao, Allison A King, Eric T Shinohara, Stephanie M Perkins
BACKGROUND: Atypical teratoid rhabdoid tumors (ATRTs) are rare brain tumors that occur primarily in children under the age of 3 years. This report evaluates the treatment approach and survival outcomes in a large cohort of patients treated in the United States. METHODS: Using the National Cancer Database, the analysis included all ATRT patients aged 0 to 18 years who were diagnosed between 2004 and 2012 and had complete treatment data. RESULTS: Three hundred sixty-one ATRT patients were evaluated...
February 15, 2017: Cancer
https://www.readbyqxmd.com/read/27745735/all-things-rhabdoid-and-smarc-an-enigmatic-exploration-with-dr-louis-p-dehner
#19
REVIEW
Christine E Fuller
Over the past several decades, our understanding of malignant rhabdoid tumors (MRT) and the central nervous system equivalent atypical teratoid/rhabdoid tumor (ATRT) has undergone considerable refinement, particularly in terms of genetic characterization. MRT (both renal and extra-renal) and ATRT share phenotypic similarities and a common genetic signature, that being inactivating alterations of the SWI/SNF complex component SMARCB1 (or rarely SMARCA4). Unfortunately, a wide array of tumors bears significantly overlapping phenotypic characteristics to MRT/ATRT, posing a formidable diagnostic challenge...
November 2016: Seminars in Diagnostic Pathology
https://www.readbyqxmd.com/read/27734605/description-of-a-new-oncogenic-mechanism-for-atypical-teratoid-rhabdoid-tumors-in-patients-with-ring-chromosome-22
#20
Heather M Byers, Margaret P Adam, Amy LaCroix, Sarah E S Leary, Bonnie Cole, William B Dobyns, Heather C Mefford
Atypical teratoid rhabdoid tumors of the central nervous system are rare, highly malignant, embryonal tumors most often occurring in children under age 3 years. Most are due to a somatic change in tumor suppressor gene SMARCB1 followed by a second-hit, typically loss of heterozygosity, best detected on immunohistochemical staining. Despite the noteworthy genetic homogeneity of atypical teratoid rhabdoid tumors, relatively little is known about the oncogenic mechanisms that lead to biallelic inactivation of SMARCB1...
January 2017: American Journal of Medical Genetics. Part A
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