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Cancer risk low dose radiation

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https://www.readbyqxmd.com/read/28537990/impact-of-the-primary-information-source-used-for-decision-making-on-treatment-perceptions-and-regret-in-prostate-cancer
#1
Narek Shaverdian, Amar U Kishan, Darlene Veruttipong, D Jeffrey Demanes, Patrick Kupelian, Susan McCloskey, Michael L Steinberg, Christopher R King
OBJECTIVE: To assess the impact of the primary source of information used by prostate cancer patients to select a radiation treatment on their overall treatment experience and on treatment regret. METHODS: Patients with low to favorable intermediate-risk prostate cancer treated with stereotactic body radiation therapy, intensity-modulated radiation therapy, or high-dose rate brachytherapy were surveyed. The questionnaire explored the decision-making experience, treatment experience, and treatment regret...
May 23, 2017: American Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28529679/new-era-of-electronic-brachytherapy
#2
EDITORIAL
Prabhakar Ramachandran
Traditional brachytherapy refers to the placement of radioactive sources on or inside the cancer tissues. Based on the type of sources, brachytherapy can be classified as radionuclide and electronic brachytherapy. Electronic brachytherapy uses miniaturized X-ray sources instead of radionuclides to deliver high doses of radiation. The advantages of electronic brachytherapy include low dose to organs at risk, reduced dose to treating staff, no leakage radiation in off state, less shielding, and no radioactive waste...
April 28, 2017: World Journal of Radiology
https://www.readbyqxmd.com/read/28520643/risk-of-lung-cancer-mortality-in-nuclear-workers-from-internal-exposure-to-alpha-particle-emitting-radionuclides
#3
James Grellier, Will Atkinson, Philippe Bérard, Derek Bingham, Alan Birchall, Eric Blanchardon, Richard Bull, Irina Canu Guseva, Cécile Challeton-de Vathaire, Rupert Cockerill, Minh T Do, Hilde Engels, Jordi Figuerola, Adrian Foster, Luc Holmstock, Christian Hurtgen, Dominique Laurier, Matthew Puncher, Anthony E Riddell, Eric Samson, Isabelle Thierry-Chef, Margot Tirmarche, Martine Vrijheid, Elisabeth Cardis
BACKGROUND: Carcinogenic risks of internal exposures to alpha-emitters (except radon) are poorly understood. Since exposure to alpha particles-particularly through inhalation-occurs in a range of settings, understanding consequent risks is a public health priority. We aimed to quantify dose-response relationships between lung dose from alpha-emitters and lung cancer in nuclear workers. METHODS: We conducted a case-control study, nested within Belgian, French, and UK cohorts of uranium and plutonium workers...
May 17, 2017: Epidemiology
https://www.readbyqxmd.com/read/28516243/clinical-characteristics-risk-factors-and-long-term-outcome-of-114-patients-with-folliculotropic-mycosis-fungoides
#4
Iris Wieser, Casey Wang, Silvia Alberti-Violetti, Genevieve Lyons, Casey Tran, Rakshandra Talpur, Madeleine Duvic
Folliculotropic mycosis fungoides (FMF) is a distinct variant of mycosis fungoides (MF) where atypical T-cells invade the hair follicles. The objective was to assess the clinical features, risk factors for progression, long-term outcome and response to treatment modalities in a large cohort of FMF patients. We, therefore, conducted a single-center retrospective study, reviewing 114 patients with FMF seen from 1987 to 2015 at the cutaneous T-cell lymphoma clinic of the MD Anderson Cancer Center. The mean age at diagnosis of FMF was 57...
May 17, 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28515807/external-validation-of-the-procars-nomograms-and-comparison-of-existing-risk-stratification-tools-for-localized-prostate-cancer
#5
David Tiberi, George Rodrigues, Tom Pickles, Jim Morris, Juanita Crook, Andre-Guy Martin, Fabio Cury, Charles Catton, Himu Lukka, Andrew Warner, Daniel Taussky
INTRODUCTION: The purpose of this study was to perform a direct comparison of several existing risk-stratification tools for localized prostate cancer in terms of their ability to predict for biochemical failure-free survival (BFFS). Two large databases were used and an external validation of two recently developed nomograms on an independent cohort was also performed in this analysis. METHODS: Patients who were treated with external beam radiotherapy (EBRT) and/or brachytherapy for localized prostate cancer were selected from the multi-institutional Genitourinary Radiation Oncologists of Canada (GUROC) Prostate Cancer Risk Stratification (ProCaRS) database (n=7974) and the Centre Hospitalier de l'Université de Montréal (CHUM) validation database (n=2266)...
March 2017: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/28514929/five-year-outcomes-from-a-prospective-trial-of-image-guided-accelerated-hypofractionated-proton-therapy-for-prostate-cancer
#6
Randal H Henderson, Curtis Bryant, Bradford S Hoppe, R Charles Nichols, William M Mendenhall, Stella Flampouri, Zhong Su, Zuofeng Li, Christopher G Morris, Nancy P Mendenhall
PURPOSE: To report 5-year outcomes of a prospective trial of image-guided accelerated hypofractionated proton therapy (AHPT) for prostate cancer. PATIENTS AND METHODS: 215 prostate cancer patients accrued to a prospective institutional review board-approved trial of 70Gy(RBE) in 28 fractions for low-risk disease (n = 120) and 72.5Gy(RBE) in 29 fractions for intermediate-risk disease (n = 95). This trial excluded patients with prostate volumes of ≥60 cm(3) or International Prostate Symptom Scores (IPSS) of ≥15, patients on anticoagulants or alpha-blockers, and patients in whom dose-constraint goals for organs at risk (OAR) could not be met...
July 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28506452/performing-nuclear-medicine-examinations-in-pregnant-women
#7
REVIEW
Paolo Zanotti-Fregonara, Elif Hindie
The number of nuclear medicine examinations performed worldwide has been steadily increasing over the last few years. By consequence, an ever increasing number of pregnant women are likely to be exposed to radioisotopes. The range of doses encountered in nuclear medicine practice is well below the threshold for deterministic effects, such as embryonic death, birth defects or mental retardation. According to the linear no-threshold hypothesis, however, stochastic effects (e.g. an increased risk of cancer) remain possible even at this dose range...
May 11, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28502238/parotid-gland-mean-dose-as-a-xerostomia-predictor-in-low-dose-domains
#8
Hubert Szymon Gabryś, Florian Buettner, Florian Sterzing, Henrik Hauswald, Mark Bangert
PURPOSE: Xerostomia is a common side effect of radiotherapy resulting from excessive irradiation of salivary glands. Typically, xerostomia is modeled by the mean dose-response characteristic of parotid glands and prevented by mean dose constraints to either contralateral or both parotid glands. The aim of this study was to investigate whether normal tissue complication probability (NTCP) models based on the mean radiation dose to parotid glands are suitable for the prediction of xerostomia in a highly conformal low-dose regime of modern intensity-modulated radiotherapy (IMRT) techniques...
May 13, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28500351/non-targeted-effects-models-predict-significantly-higher-mars-mission-cancer-risk-than-targeted-effects-models
#9
Francis A Cucinotta, Eliedonna Cacao
Cancer risk is an important concern for galactic cosmic ray (GCR) exposures, which consist of a wide-energy range of protons, heavy ions and secondary radiation produced in shielding and tissues. Relative biological effectiveness (RBE) factors for surrogate cancer endpoints in cell culture models and tumor induction in mice vary considerable, including significant variations for different tissues and mouse strains. Many studies suggest non-targeted effects (NTE) occur for low doses of high linear energy transfer (LET) radiation, leading to deviation from the linear dose response model used in radiation protection...
May 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28499487/external-beam-radiation-therapy-with-or-without-low-dose-rate-brachytherapy-analysis-of-favorable-and-unfavorable-intermediate-risk-prostate-cancer-patients
#10
Ahmed E Abugharib, Robert T Dess, Payal D Soni, Vrinda Narayana, Cheryl Evans, Mohamed S Gaber, Felix Y Feng, Patrick W McLaughlin, Daniel E Spratt
PURPOSE: To compare the tumor control and toxicity in men with intermediate-risk prostate cancer treated with either external beam radiation therapy (EBRT) or EBRT plus low-dose-rate brachytherapy (combo-RT). METHODS AND MATERIALS: Between 1995 and 2012, 579 men with intermediate-risk prostate cancer were treated with either EBRT (n = 388) or combo-RT (n = 191). Outcomes assessed included biochemical recurrence-free survival (bRFS), distant metastasis-free survival (DMFS), and cumulative incidence of genitourinary (GU) and gastrointestinal toxicity...
May 9, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28490467/dose-optimization-to-minimize-radiation-risk-for-children-undergoing-ct-and-nuclear-medicine-imaging-is-misguided-and-detrimental
#11
Jeffry A Siegel, Bill Sacks, Charles W Pennington, James S Welsh
A debate exists within the medical community on whether the linear no-threshold (LNT) model of ionizing radiation exposure accurately predicts subsequent radiogenic cancer incidence. We evaluate the evidence that refutes LNT, and its corollary efforts to reduce radiation exposures for CT and nuclear medicine imaging in accord with ALARA (as low as reasonable achievable), particularly for children. Further, we review studies demonstrating that children are not, in fact, more radiosensitive than adults in the radiological imaging dose range, rendering dose reduction for children unjustifiable and counterproductive...
May 10, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28488593/towards-a-new-dose-and-dose-rate-effectiveness-factor-ddref-some-comments
#12
K H Chadwick
The aim of this article is to offer a broader, mechanism-based, analytical tool than that used by (Rühm et al 2016 Ann. ICRP 45 262-79) for the interpretation of cancer induction relationships. The article explains the limitations of this broader analytical tool and the implications of its use in view of the publications by Leuraud et al 2015 (Lancet Haematol. 2 e276-81) and Richardson et al 2015 (Br. Med. J. 351 h5359). The publication by Rühm et al 2016 (Ann. ICRP 45 262-79), which is clearly work in progress, reviews the current status of the dose and dose-rate effectiveness factor (DDREF) as recommended by the ICRP...
May 10, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28476188/environmental-exposure-and-risk-of-childhood-leukemia-an-overview
#13
REVIEW
Joachim Schüz, Friederike Erdmann
Childhood leukemia is the most common cancer diagnosed in children worldwide. However, only a few causes have been established so far, mainly some genetic syndromes and high doses of ionizing radiation. Major efforts have been undertaken to study the relationship between environmental factors and the risk of childhood leukemia, inspired by geographical variation in incidence rates. Some evidence has emerged for parental occupational exposures to pesticides, whereas there is less evidence for an association with postnatal pesticide exposure...
November 2016: Archives of Medical Research
https://www.readbyqxmd.com/read/28472357/thyroid-dysfunction-and-autoimmune-thyroid-diseases-among-atomic-bomb-survivors-exposed-in-childhood
#14
Misa Imaizumi, Waka Ohishi, Eiji Nakashima, Nobuko Sera, Kazuo Neriishi, Michiko Yamada, Yoshimi Tatsukawa, Ikuno Takahashi, Saeko Fujiwara, Keizo Sugino, Takao Ando, Toshiro Usa, Atsushi Kawakami, Masazumi Akahoshi, Ayumi Hida
Context: The risk of thyroid cancer increases and persists for decades among individuals exposed to ionizing radiation in childhood, while long-term effects of childhood exposure to medium to low doses radiation on thyroid dysfunction and autoimmune thyroid diseases have remained unclear. Objective: To evaluate radiation-dose responses for the prevalence of thyroid dysfunction and autoimmune thyroid disease among atomic -bomb survivors exposed in childhood. Design, Setting, and Participants: Hiroshima and Nagasaki atomic-bomb survivors who were younger than 10 years old at exposure underwent thyroid examinations at the Radiation Effects Research Foundation between 2007 and 2011, which was 62-66 years after the bombing...
May 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28462644/evaluation-of-the-radiation-dose-exposure-and-associated-cancer-risks-in-patients-having-preoperative-parathyroid-localization
#15
S R Moosvi, S Smith, J Hathorn, T Groot-Wassink
OBJECTIVE The study aimed to evaluate the total effective and organ absorbed radiation doses associated with three- and four-phase parathyroid computed tomography (CT) and sestamibi scans used for the preoperative localisation of parathyroid adenomas in a cohort of patients with primary hyperparathyroidism at a single institution. We aimed to assess the risk of cancer incidence for the organs demonstrating the highest absorbed doses for the different imaging techniques, and more specifically determine the risk for our cohort of patients...
May 2017: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/28458564/radiobiological-evaluation-of-simultaneously-dose-escalated-versus-non-escalated-intensity-modulated-radiation-therapy-for-patients-with-upper-thoracic-esophageal-cancer
#16
Bao-Tian Huang, Li-Li Wu, Long-Jia Guo, Liang-Yu Xu, Rui-Hong Huang, Pei-Xian Lin, Jian-Zhou Chen, De-Rui Li, Chuang-Zhen Chen
OBJECTIVE: To compare the radiobiological response between simultaneously dose-escalated and non-escalated intensity-modulated radiation therapy (DE-IMRT and NE-IMRT) for patients with upper thoracic esophageal cancer (UTEC) using radiobiological evaluation. METHODS: Computed tomography simulation data sets for 25 patients pathologically diagnosed with primary UTEC were used in this study. DE-IMRT plan with an escalated dose of 64.8 Gy/28 fractions to the gross tumor volume (GTV) and involved lymph nodes from 25 patients pathologically diagnosed with primary UTEC, was compared to an NE-IMRT plan of 50...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28457109/salvage-radiation-therapy-for-biochemical-failure-following-radical-prostatectomy
#17
Benjamin Spieler, Jeffrey Goldstein, Yaacov R Lawrence, Akram Saad, Raanan Berger, Jacob Ramon, Zohar Dotan, Menachem Laufer, Ilana Weiss, Lev Tzvang, Philip Poortmans, Zvi Symon
BACKGROUND: Radiotherapy to the prostate bed is used to eradicate residual microscopic disease following radical prostatectomy for prostate cancer. Recommendations are based on historical series. OBJECTIVES: To determine outcomes and toxicity of contemporary salvage radiation therapy (SRT) to the prostate bed. METHODS: We reviewed a prospective ethics committee-approved database of 229 patients referred for SRT. Median pre-radiation prostate-specific antigen (PSA) was 0...
January 2017: Israel Medical Association Journal: IMAJ
https://www.readbyqxmd.com/read/28451427/external-beam-radiation-for-the-treatment-of-castration-resistant-prostate-cancer-following-primary-hormonal-therapy-with-androgen-ablation-analysis-and-outcome-of-21-patients
#18
Teele Kuusk, Kristiina Pulliainen, Markku H Vaarala
Patients who undergo early androgen-deprivation therapy for prostate cancer may eventually develop castration-resistant prostate cancer. However, no optimal treatment for non-metastasized castration-resistant prostate cancer has yet been established. In the present retrospective, single-institutional study, the radiotherapy (RT) outcomes were evaluated in patients who underwent androgen-deprivation therapy for non-metastatic prostate cancer and subsequently developed castration-resistant disease. Following a thorough chart review, the data of 21 patients with castration-resistant prostate cancer who were treated between 2000 and 2010 with external beam radiation therapy (EBRT) at a prostate radiation dose of >45 Gy were evaluated...
March 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28440225/observation-of-nonanoic-acid-and-aldehydes-in-exhaled-breath-of-patients-with-lung-cancer
#19
L Callol-Sanchez, M A Munoz-Lucas, O Gomez-Martin, J A Maldonado-Sanz, C Civera-Tejuca, C Gutierrez-Ortega, G Rodriguez-Trigo, J Jareno-Esteban
Lung cancer (LC) is the leading cause of cancer death in men and the second leading cause in women worldwide. The use of low-dose computed tomography in early diagnosis was shown to reduce mortality by 20% with a median follow-up time of 6.5 years. In order to increase profitability and reduce radiation risks and costs, exhaled biomarkers could serve to help establish narrower inclusion criteria. The aim of this study was to identify new, well-founded volatile organic compounds in exhaled breath which distinguish LC patients from chronic obstructive pulmonary disease (COPD) patients and healthy subjects...
April 25, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28439736/early-cardiac-perfusion-defects-after-left-sided-radiation-therapy-for-breast-cancer-is-there-a-volume-response
#20
REVIEW
Orit Kaidar-Person, Timothy M Zagar, Jorge Daniel Oldan, Jason Matney, Ellen L Jones, Shiva Das, Brian C Jensen, Richard C Zellars, Terence Z Wong, Lawrence B Marks
PURPOSE: Cardiac single-photon emission computed tomography (SPECT) is often used to identify defects in myocardial perfusion due to atherosclerotic coronary artery disease. It was also used in studies to evaluate radiation therapy (RT)-associated cardiac abnormalities. In the current review, we aim to evaluate the rates of post-RT cardiac SPECT early perfusion abnormalities and relate this to the irradiated left ventricular volume. METHODS: The studies cited in this systematic review were identified using the preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines...
April 21, 2017: Breast Cancer Research and Treatment
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