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Selective internal radiation

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https://www.readbyqxmd.com/read/28916345/is-a-technetium-99m-macroaggregated-albumin-scan-essential-in-the-workup-for-selective-internal-radiation-therapy-with-yttrium-90-an-analysis-of-532-patients
#1
Lidia Sancho, Macarena Rodriguez-Fraile, Jose Ignacio Bilbao, Carmen Beorlegui Arteta, Mercedes Iñarrairaegui, Veronica Moran, Bruno Sangro
PURPOSE: To determine if baseline patient, tumor, and pretreatment evaluation characteristics could help identify patients who require technetium-99m ((99m)Tc) macroaggregated albumin ((99m)Tc MAA) imaging before selective internal radiation therapy (SIRT). MATERIALS AND METHODS: In this retrospective analysis, 532 consecutive patients with primary (n = 248) or metastatic (n = 284) liver tumors were evaluated between 2006 and 2015. Variables were compared between patients in whom (99m)Tc MAA imaging results contraindicated/modified SIRT administration with yttrium-90 ((90)Y) resin microspheres and those who were treated as initially planned...
September 13, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28913177/big-data-in-designing-clinical-trials-opportunities-and-challenges
#2
Charles S Mayo, Martha M Matuszak, Matthew J Schipper, Shruti Jolly, James A Hayman, Randall K Ten Haken
Emergence of big data analytics resource systems (BDARSs) as a part of routine practice in Radiation Oncology is on the horizon. Gradually, individual researchers, vendors, and professional societies are leading initiatives to create and demonstrate use of automated systems. What are the implications for design of clinical trials, as these systems emerge? Gold standard, randomized controlled trials (RCTs) have high internal validity for the patients and settings fitting constraints of the trial, but also have limitations including: reproducibility, generalizability to routine practice, infrequent external validation, selection bias, characterization of confounding factors, ethics, and use for rare events...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28911068/early-stage-mantle-cell-lymphoma-a-retrospective-analysis-from-the-international-lymphoma-radiation-oncology-group-ilrog
#3
B S Dabaja, A D Zelenetz, A K Ng, R W Tsang, S Qi, P K Allen, D Hodgson, U Ricardi, R T Hoppe, R Advani, P M Mauch, L S Constine, L Specht, Y Li, S A Terezakis, A Wirth, G Reinartz, H T Eich, B M P Aleman, P Barr, J Yahalom
Background: Mantle cell lymphoma (MCL) rarely presents as early-stage disease, but clinical observations suggest that patients who present with early-stage disease may have better outcomes than those with advanced-stage disease. Patients and methods: In this 13-institution study, we examined outcomes among 179 patients with early-stage (stage I or II) MCL in an attempt to identify prognostic factors that influence treatment selection and outcome. Variables examined included clinical characteristics, treatment modality, response to therapy, sites of failure, and survival...
September 1, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28890809/a-single-institute-retrospective-trial-of-concurrent-chemotherapy-with-sir-spheres-%C3%A2-versus-sir-spheres-%C3%A2-alone-in-chemotherapy-resistant-colorectal-cancer-liver-metastases
#4
May Cho, Jonathan Kessler, John J Park, Aram Lee, Jun Gong, Gagandeep Singh, Yi-Jen Chen, Philip H G Ituarte, Marwan Fakih
BACKGROUND: The use of selective internal radiation therapy with yttrium 90 resin microspheres (SIR-Spheres(®)) in chemotherapy-resistant colorectal cancer liver metastases has been associated with favorable progression-free survival (PFS) and overall survival when given alone or concurrently with chemotherapy. We conducted a single institute retrospective trial to explore the potential impact of SIR-Spheres(®) with concurrent chemotherapy vs. SIR-Spheres(®) alone on liver PFS in patients with colorectal liver metastases (CRLM)...
August 2017: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28865683/evaluation-of-near-miss-and-adverse-events-in-radiation-oncology-using-a-comprehensive-causal-factor-taxonomy
#5
Matthew B Spraker, Robert Fain, Olga Gopan, Jing Zeng, Matthew Nyflot, Loucille Jordan, Gabrielle Kane, Eric Ford
PURPOSE: Incident learning systems (ILSs) are a popular strategy for improving safety in radiation oncology (RO) clinics, but few reports focus on the causes of errors in RO. The goal of this study was to test a causal factor taxonomy developed in 2012 by the American Association of Physicists in Medicine and adopted for use in the RO: Incident Learning System (RO-ILS). METHODS AND MATERIALS: Three hundred event reports were randomly selected from an institutional ILS database and Safety in Radiation Oncology (SAFRON), an international ILS...
September 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28846586/performance-testing-of-selected-types-of-electronic-personal-dosimeters-in-x-and-gamma-radiation-fields
#6
Nikola Kržanović, Miloš Živanović, Olivera Ciraj-Bjelac, Đorđe Lazarević, Sandra Ćeklić, Srboljub Stanković
Electronic personal dosimeters (EPDs) are increasingly being used alongside conventional thermoluminescent dosimeters to measure the dose of legal record in terms of personal dose equivalent. Therefore, it is of great importance to execute performance tests of these dosimeters in photon fields of various energies and at various angles of incidence. This testing is done in order to simulate the behavior of these dosimeters in realistic multidirectional polyenergetic ionizing radiation fields. Tests of accuracy, linearity, energy response, and angular response have been performed on 10 EPDs from multiple manufacturers...
October 2017: Health Physics
https://www.readbyqxmd.com/read/28840141/changing-therapeutic-paradigms-predicting-mcrc-lesion-response-to-selective-internal-radionuclide-therapy-sirt-based-on-critical-absorbed-dose-thresholds-a-case-study
#7
Kathy P Willowson, Elizabeth J Bernard, Richard Maher, Stephen J Clarke, Dale L Bailey
A 65 year old male with metastatic colorectal cancer (mCRC) in the liver was referred for selective internal radionuclide therapy (SIRT) following a history of extensive systemic chemotherapy. (90)Y PET imaging was performed immediately after treatment and used to confirm lesion targeting and measure individual lesion absorbed doses. Lesion dosimetry was highly predictive of eventual response in the follow-up FDG PET performed 8 weeks after therapy. The derived radiation dose map was used to plan a second SIRT procedure aiming to protect healthy liver by keeping absorbed dose below the critical dose threshold, whilst targeting the remaining lesions that had received sub-critical dosing...
2017: Asia Oceania Journal of Nuclear Medicine & Biology
https://www.readbyqxmd.com/read/28835559/mechanics-of-evolutionary-digit-reduction-in-fossil-horses-equidae
#8
Brianna K McHorse, Andrew A Biewener, Stephanie E Pierce
Digit reduction is a major trend that characterizes horse evolution, but its causes and consequences have rarely been quantitatively tested. Using beam analysis on fossilized centre metapodials, we tested how locomotor bone stresses changed with digit reduction and increasing body size across the horse lineage. Internal bone geometry was captured from 13 fossil horse genera that covered the breadth of the equid phylogeny and the spectrum of digit reduction and body sizes, from Hyracotherium to Equus To account for the load-bearing role of side digits, a novel, continuous measure of digit reduction was also established-toe reduction index (TRI)...
August 30, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28834083/microstructural-white-matter-tract-alteration-in-prader-willi-syndrome-a-diffusion-tensor-imaging-study
#9
Lauren J Rice, Jim Lagopoulos, Michael Brammer, Stewart L Einfeld
Prader-Willi Syndrome (PWS) is a genetic disorder characterized by infantile hypotonia, hyperphagia, hypogonadism, growth hormone deficiency, intellectual disability, and severe emotional and behavioral problems. The brain mechanisms that underpin these disturbances are unknown. Diffusion tensor imaging (DTI) enables in vivo investigation of the microstructural integrity of white matter pathways. To date, only one study has used DTI to examine white matter alterations in PWS. However, that study used selected regions of interest, rather than a whole brain analysis...
September 2017: American Journal of Medical Genetics. Part C, Seminars in Medical Genetics
https://www.readbyqxmd.com/read/28831281/improving-radiation-oncology-through-clinical-audits-introducing-the-iroca-project
#10
Maria Glòria Torras, Magdalena Fundowicz, Luisa Aliste, Esther Asensio, Anna Maria Boladeras, Josep Maria Borràs, Luísa Carvalho, Carla Castro, Letizia Deantonio, Ewelina Konstanty, Marco Krengli, Marta Kruszyna, Joana Lencart, Miquel Macià, Susanna Marín, Carles Muñoz-Montplet, Carla Pisani, Diana Pinto, Montserrat Puigdemont, Ferran Guedea, Artur Aguiar, Piotr Milecki, Julian Malicki
As radiotherapy practice and processes become more complex, the need to assure quality control becomes ever greater. At present, no international consensus exists with regards to the optimal quality control indicators for radiotherapy; moreover, few clinical audits have been conducted in the field of radiotherapy. The present article describes the aims and current status of the international IROCA "Improving Radiation Oncology Through Clinical Audits" project. The project has several important aims, including the selection of key quality indicators, the design and implementation of an international audit, and the harmonization of key aspects of radiotherapy processes among participating institutions...
September 2017: Reports of Practical Oncology and Radiotherapy
https://www.readbyqxmd.com/read/28826279/a-prognostic-nomogram-for-colorectal-cancer-liver-metastases-after-percutaneous-thermal-ablation
#11
Yang Wang, Jiasheng Zheng, Hui Chen, Caixia Hu, Bin Sun, Haiyan Wang, Qinsheng Shi, Jiang Long, Honghai Zhang, Wei Li
PURPOSE: To assess the efficacy of percutaneous thermal ablation in treating colorectal cancer liver metastases (CRCLM), and to propose a prognostic nomogram for overall survival (OS). MATERIALS AND METHODS: Seventy-one patients with CRCLM undergoing thermal ablation at our institute from 2009 to 2013 were identified and analyzed to formulate a prognostic nomogram. The concordance index (C-index) and calibration curve were calculated to evaluate the predictive accuracy of the nomogram...
August 22, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28798822/an-assessment-of-prostate-cancer-research-international-active-surveillance-prias-criteria-for-active-surveillance-of-clinically-low-risk-prostate-cancer-patients
#12
Vitor da Silva, Ilias Cagiannos, Luke T Lavallée, Ranjeeta Mallick, Kelsey Witiuk, Sonya Cnossen, James A Eastham, Dean A Fergusson, Chris Morash, Rodney H Breau
INTRODUCTION: Active surveillance is a strategy to delay or prevent treatment of indolent prostate cancer. The Prostate Cancer Research International: Active Surveillance (PRIAS) criteria were developed to select patients for prostate cancer active surveillance. The objective of this study was to compare pathological findings from PRIAS-eligible and PRIAS-ineligible clinically low-risk prostate cancer patients. METHODS: A D'Amico low-risk cohort of 1512 radical prostatectomy patients treated at The Ottawa Hospital or Memorial Sloan Kettering Cancer Centre between January 1995 and December 2007 was reviewed...
August 2017: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/28797698/prognostic-value-of-lymph-node-ratio-and-number-of-positive-inguinal-nodes-in-patients-with-vulvar-cancer
#13
Stephan Polterauer, Richard Schwameis, Christoph Grimm, Ronalds Macuks, Sara Iacoponi, Kamil Zalewski, Ignacio Zapardiel
OBJECTIVE: To estimate the prognostic significance of lymph node ratio and number of positive nodes in vulvar cancer patients. METHODS: This international multicenter retrospective study included patients diagnosed with vulvar cancer treated with inguinal lymphadenectomy. Lymph node ratio (LNR) is the ratio of the number of positive lymph nodes (LN) to the number of removed LN. Patients were stratified into risk groups according to LNR. LNR was correlated with clinical-pathological parameters...
August 7, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28767473/acquired-hemophilia-a-after-hepatic-yttrium-90-radioembolization-a-case-report
#14
Susanna Tribuzi, Alessia Naccarato, Lorella Pelagalli, Marco Covotta, Giulia Torregiani, Claudia Claroni, Ester Forastiere
Acquired hemophilia is a rare but potentially life-threatening bleeding disorder caused by the development of autoantibodies (inhibitors) directed against plasma coagulation factors, most frequently factor VIII. We report a case of a 65-year-old man with hepatocellular carcinoma who bled massively after a hepatic Yttrium-90 radioembolization procedure (Selective Internal Radiation Therapy with Yttrium-90 Resin Microspheres [SIRTex]). An acquired deficiency of factor VIII was diagnosed and successfully treated with recombinant activated factor VII and immunosuppression...
August 1, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28758319/treatment-options-for-unresectable-hcc-with-a-focus-on-sirt-with-yttrium-90-resin-microspheres
#15
REVIEW
Eric A Wang, Jeff P Stein, Ross J Bellavia, Scott R Broadwell
Hepatocellular carcinoma (HCC), the predominant form of primary liver cancer, is the second leading cause of cancer-related deaths across the globe. Only a small percentage of HCC patients (~20%-30%) are diagnosed at an early stage when first-line treatment options may be effective. The majority of HCC patients (>70%) are diagnosed with unresectable disease and given a poor overall prognosis. Current treatment guidelines recommend locoregional therapy with transarterial chemoembolisation (TACE) and systemic therapy with sorafenib as first-line treatment for patients with intermediate and advanced stage HCC...
July 30, 2017: International Journal of Clinical Practice
https://www.readbyqxmd.com/read/28748383/is-ambient-heat-exposure-levels-associated-with-miscarriage-or-stillbirths-in-hot-regions-a-cross-sectional-study-using-survey-data-from-the-ghana-maternal-health-survey-2007
#16
Benedict Asamoah, Tord Kjellstrom, Per-Olof Östergren
It is well established that high ambient heat could cause congenital abnormalities resulting in miscarriage or stillbirth among certain species of mammals. However, this has not been systematically studied in real field settings among humans, despite the potential value of such knowledge for estimating the impact of global warming on the human species. This study sought to test the hypothesis that maternal heat exposure during pregnancy in hot regions is associated with increased prevalence of spontaneous abortions or stillbirths and to develop an analytical strategy to use existing data from maternal health surveys and existing data on historical heat levels at a geographic grid cell level...
July 26, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28744319/-177-lu-pentixather-comprehensive-preclinical-characterization-of-a-first-cxcr4-directed-endoradiotherapeutic-agent
#17
Margret Schottelius, Theresa Osl, Andreas Poschenrieder, Frauke Hoffmann, Seval Beykan, Heribert Hänscheid, Andreas Schirbel, Andreas K Buck, Saskia Kropf, Markus Schwaiger, Ulrich Keller, Michael Lassmann, Hans-Jürgen Wester
Purpose: Based on the clinical relevance of the chemokine receptor 4 (CXCR4) as a molecular target in cancer and on the success of [(68)Ga]pentixafor as an imaging probe for high-contrast visualization of CXCR4-expression, the spectrum of clinical CXCR4-targeting was expanded towards peptide receptor radionuclide therapy (PRRT) by the development of [(177)Lu]pentixather. Experimental design: CXCR4 affinity, binding specificity, hCXCR4 selectivity and internalization efficiency of [(177)Lu]pentixather were evaluated using different human and murine cancer cell lines...
2017: Theranostics
https://www.readbyqxmd.com/read/28740906/the-development-commercialization-and-clinical-context-of-yttrium-90-radiolabeled-resin-and-glass-microspheres
#18
REVIEW
Mark A Westcott, Douglas M Coldwell, David M Liu, Joseph F Zikria
Selective internal radiation therapy has emerged as a well-accepted therapeutic for primary and metastatic hepatic malignancies. This therapeutic modality requires the combined efforts of multiple medical disciplines to ensure the safe delivery of yttrium-90 ((90)Y)-labeled microspheres. The development of this therapy followed decades of clinical research involving tumor vascularity and microsphere development. Today, it is essential that treating physicians have a thorough understanding of hepatic tumor vascularity and (90)Y microsphere characteristics before undertaking this complex intervention...
October 2016: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/28740902/urinary-quality-of-life-outcomes-in-men-who-were-treated-with-image-guided-intensity-modulated-radiation-therapy-for-prostate-cancer
#19
Simpa S Salami, Edward Obedian, Shawn Zimberg, Carl A Olsson
PURPOSE: Quality of life (QoL) outcomes play a major role in the treatment selection for prostate cancer (CaP). We evaluated the urinary QoL outcomes in men who were treated with image-guided intensity-modulated radiation therapy (IG-IMRT) for CaP. METHODS AND MATERIALS: We enrolled men who were diagnosed with CaP and underwent IG-IMRT in a large urological group practice into a prospectively maintained database. The typical radiation treatment dosage to prostates and seminal vesicles was 8100 cGy in 45 fractions...
October 2016: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/28736283/multicellular-dosimetric-chain-for-molecular-radiotherapy-exemplified-with-dose-simulations-on-3d-cell-spheroids
#20
Vappu Reijonen, Liisa K Kanninen, Eero Hippeläinen, Yan-Ru Lou, Eero Salli, Alexey Sofiev, Melina Malinen, Timo Paasonen, Marjo Yliperttula, Antti Kuronen, Sauli Savolainen
PURPOSE: Absorbed radiation dose-response relationships are not clear in molecular radiotherapy (MRT). Here, we propose a voxel-based dose calculation system for multicellular dosimetry in MRT. We applied confocal microscope images of a spherical cell aggregate i.e. a spheroid, to examine the computation of dose distribution within a tissue from the distribution of radiopharmaceuticals. METHODS: A confocal microscope Z-stack of a human hepatocellular carcinoma HepG2 spheroid was segmented using a support-vector machine algorithm and a watershed function...
July 20, 2017: Physica Medica: PM
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