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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
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
https://www.readbyqxmd.com/read/28723150/double-imaging-photoelectron-photoion-coincidence-sheds-new-light-on-the-dissociation-of-state-selected-ch3f-ions
#10
Xiaofeng Tang, Gustavo A Garcia, Laurent Nahon
The vacuum ultraviolet (VUV) photoionization and dissociative photoionization of methyl fluoride (CH3F) in the 12.2-19.8 eV energy range were investigated by using synchrotron radiation coupled to a double imaging photoelectron photoion coincidence (i(2)PEPICO) spectrometer. The production of several fragment ions including CH2F(+), CHF(+), CH3(+), and CH2(+) as a function of state and internal energy of CH3F(+) ions was identified and analyzed, with their individual appearance energies measured through threshold photoelectron spectroscopy...
July 31, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28717378/evaluation-of-shoulder-girdle-strength-more-than-12-month-after-modified-radical-mastectomy-and-axillary-nodes-dissection
#11
Mahdieh Akoochakian, Heidar Ali Davari, Mohammad Hossein Alizadeh, Nader Rahnama
BACKGROUND: Muscle strength is necessary for upper body normal function. Upper extremity function impairments have been reported in breast cancer (BC) survivors. It is not possible to know precisely if cancer adjuvant therapy such as radiation and chemotherapy had any effect on the unaffected arm. The aim of this study was to compare shoulder girdle strength among women with BC and similarly aged women without cancer. MATERIALS AND METHODS: Thirty-three postmenopausal women (51 ± 6...
2017: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/28716113/whole-metagenome-profiles-of-particulates-collected-from-the-international-space-station
#12
Nicholas A Be, Aram Avila-Herrera, Jonathan E Allen, Nitin Singh, Aleksandra Checinska Sielaff, Crystal Jaing, Kasthuri Venkateswaran
BACKGROUND: The built environment of the International Space Station (ISS) is a highly specialized space in terms of both physical characteristics and habitation requirements. It is unique with respect to conditions of microgravity, exposure to space radiation, and increased carbon dioxide concentrations. Additionally, astronauts inhabit a large proportion of this environment. The microbial composition of ISS particulates has been reported; however, its functional genomics, which are pertinent due to potential impact of its constituents on human health and operational mission success, are not yet characterized...
July 17, 2017: Microbiome
https://www.readbyqxmd.com/read/28715670/estimated-lifetime-effective-dose-to-hunters-and-their-families-in-the-three-most-contaminated-counties-in-sweden-after-the-chernobyl-nuclear-power-plant-accident-in-1986-a-pilot-study
#13
Martin Tondel, Christopher Rääf, Robert Wålinder, Afrah Mamour, Mats Isaksson
Hunters and their families were one of the most exposed subpopulations in Sweden after the Chernobyl nuclear power plant accident in 1986. In this pilot study we used existing registries and whole-body measurements to develop algorithms to calculate lifetime effective doses and collective doses to some hunters in Sweden. Ten hunters and their family members were randomly selected from each of the three most contaminated counties in Sweden (Västernorrland, Uppsala, Gävleborg) using the register for hunting weapons from the Police Authority in 1985...
July 14, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28687192/optimisation-of-reconstruction-volumetry-and-dosimetry-for-99m-tc-spect-and-90-y-pet-images-towards-reliable-dose-volume-histograms-for-selective-internal-radiation-therapy-with-90-y-microspheres
#14
M Bernardini, H Thevenet, C Berthold, A Desbrée, C Smadja, C Desiré, M Bianciardi, N Ghazzar
PURPOSE: In Selective Internal Radiation Therapy (SIRT), (99m)Tc-MAA SPECT images are commonly used to predict microspheres distribution but recent works used (90)Y-microspheres PET images. Nevertheless, evaluation of the predictive power of (99m)Tc-MAA has been hampered by the lack of reliable comparisons between (99m)Tc-SPECT and (90)Y-PET images. Our aim was to determine the "in situ" optimisation procedure in order to reliably compare (99m)Tc-SPECT and (90)Y-PET images and achieve optimal personal dosimetry...
July 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28653161/the-post-sir-spheres-surgery-study-p4s-retrospective-analysis-of-safety-following-hepatic-resection-or-transplantation-in-patients-previously-treated-with-selective-internal-radiation-therapy-with-yttrium-90-resin-microspheres
#15
Fernando Pardo, Bruno Sangro, Rheun-Chuan Lee, Derek Manas, Rohan Jeyarajah, Vincent Donckier, Geert Maleux, Antonio D Pinna, Lourens Bester, David L Morris, David Iannitti, Pierce K Chow, Richard Stubbs, Paul J Gow, Gianluca Masi, Kevin T Fisher, Wan Y Lau, Konstantinos Kouladouros, Georgios Katsanos, Giorgio Ercolani, Fernando Rotellar, José I Bilbao, Michael Schoen
BACKGROUND: Reports show that selective internal radiation therapy (SIRT) may downsize inoperable liver tumors to resection or transplantation, or enable a bridge-to-transplant. A small-cohort study found that long-term survival in patients undergoing resection following SIRT appears possible but no robust studies on postsurgical safety outcomes exist. The Post-SIR-Spheres Surgery Study was an international, multicenter, retrospective study to assess safety outcomes of liver resection or transplantation following SIRT with yttrium-90 (Y-90) resin microspheres (SIR-Spheres(®); Sirtex)...
September 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28636805/a-hybrid-phantom-system-for-patient-skin-and-organ-dosimetry-in-fluoroscopically-guided-interventions
#16
David Borrego, Daniel Siragusa, Stephen Balter, Wesley E Bolch
To investigate calibrations for improved estimates of skin dose and to develop software for computing absorbed organ doses for fluoroscopically guided interventions (FGIs) with the use of radiation dose structured reports (RDSR) and the UF/NCI family of hybrid computational phantoms METHODS AND MATERIALS: Institutional review board approval was obtained for this retrospective study in which ten RDSRs were selected for their high cumulative reference air kerma values. Skin doses were computed using the University of Florida's rapid in-clinic peak skin dose algorithm (or UF-RIPSA)...
June 21, 2017: Medical Physics
https://www.readbyqxmd.com/read/28634672/hcc-locoregional-therapies-yttrium-90-y-90-selective-internal-radiation-therapy-sirt
#17
REVIEW
İsa Burak Güney
No abstract text is available yet for this article.
June 21, 2017: Journal of Gastrointestinal Cancer
https://www.readbyqxmd.com/read/28632200/the-beginning-and-development-of-the-theranostic-approach-in-nuclear-medicine-as-exemplified-by-the-radionuclide-pair-86-y-and-90-y
#18
Frank Rösch, Hans Herzog, Syed M Qaim
In the context of radiopharmacy and molecular imaging, the concept of theranostics entails a therapy-accompanying diagnosis with the aim of a patient-specific treatment. Using the adequate diagnostic radiopharmaceutical, the disease and the state of the disease are verified for an individual patient. The other way around, it verifies that the radiopharmaceutical in hand represents a target-specific and selective molecule: the "best one" for that individual patient. Transforming diagnostic imaging into quantitative dosimetric information, the optimum radioactivity (expressed in maximum radiation dose to the target tissue and tolerable dose to healthy organs) of the adequate radiotherapeutical is applied to that individual patient...
June 20, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28624290/feasibility-of-reducing-differences-in-estimated-doses-in-nuclear-medicine-between-a-patient-specific-and-a-reference-phantom
#19
Alexandra Zvereva, Helmut Schlattl, Maria Zankl, Janine Becker, Nina Petoussi-Henss, Yeon Soo Yeom, Chan Hyeong Kim, Christoph Hoeschen, Katia Parodi
The feasibility of reducing the differences between patient-specific internal doses and doses estimated using reference phantoms was evaluated. Relatively simple adjustments to a polygon-surface ICRP adult male reference phantom were applied to fit selected individual dimensions using the software Rhinoceros®4.0. We tested this approach on two patient-specific phantoms: the biggest and the smallest phantoms from the Helmholtz Zentrum München library. These phantoms have unrelated anatomy and large differences in body-mass-index...
July 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28621586/the-cooler-code-a-novel-analytical-approach-to-calculate-subcellular-energy-deposition-by-internal-electron-emitters
#20
Mattia Siragusa, Giorgio Baiocco, Pil M Fredericia, Werner Friedland, Torsten Groesser, Andrea Ottolenghi, Mikael Jensen
COmputation Of Local Electron Release (COOLER), a software program has been designed for dosimetry assessment at the cellular/subcellular scale, with a given distribution of administered low-energy electron-emitting radionuclides in cellular compartments, which remains a critical step in risk/benefit analysis for advancements in internal radiotherapy. The software is intended to overcome the main limitations of the medical internal radiation dose (MIRD) formalism for calculations of cellular S-values (i.e., dose to a target region in the cell per decay in a given source region), namely, the use of the continuous slowing down approximation (CSDA) and the assumption of a spherical cell geometry...
August 2017: Radiation Research
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