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International Journal of Radiation Oncology, Biology, Physics

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https://www.readbyqxmd.com/read/28258897/local-hypothermia-as-a-radioprotector-of-the-rectal-wall-during-prostate-stereotactic-body-radiation-therapy
#1
Brian A Hrycushko, Rajiv Chopra, James W Sayre, James A Richardson, Michael R Folkert, Robert D Timmerman, Paul M Medin
PURPOSE: To compare the single-fraction dose-related incidence of rectal obstruction and/or bleeding in normothermic and hypothermic rectums of a rat model. METHODS AND MATERIALS: A 1.9-cm length of rectum was irradiated with a single fraction in 57 Sprague-Dawley rats using a dedicated image-guided small animal irradiator and Monte Carlo-based treatment planning system. All rats had a rectal temperature control apparatus placed during irradiation and were stratified to achieve either a normothermic (37°C) or hypothermic (15°C) rectal wall temperature...
January 11, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28258890/water-exchange-rate-constant-as-a-biomarker-of-treatment-efficacy-in-patients-with-brain-metastases-undergoing-stereotactic-radiosurgery
#2
Hatef Mehrabian, Kimberly L Desmond, Sofia Chavez, Colleen Bailey, Radoslaw Rola, Arjun Sahgal, Gregory J Czarnota, Hany Soliman, Anne L Martel, Greg J Stanisz
PURPOSE: This study was designed to evaluate whether changes in metastatic brain tumors after stereotactic radiosurgery (SRS) can be seen with quantitative MRI early after treatment. METHODS AND MATERIALS: Using contrast-enhanced MRI, a 3-water-compartment tissue model consisting of intracellular (I), extracellular-extravascular (E), and vascular (V) compartments was used to assess the intra-extracellular water exchange rate constant (kIE), efflux rate constant (kep), and water compartment volume fractions (M0,I, M0,E, M0,V)...
January 10, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28258901/stereotactic-body-radiation-therapy-in-octo-and-nonagenarians-for-the-treatment-of-early-stage-lung-cancer
#3
Meredith Giuliani, Andrew Hope, Matthias Guckenberger, Frederick Mantel, Heike Peulen, Jan-Jakob Sonke, José Belderbos, Maria Werner-Wasik, Hong Ye, Inga S Grills
PURPOSE: To determine the safety and efficacy of lung stereotactic body radiation therapy (SBRT) in octo- and nonagenarians and to compare their outcomes with those of younger patients. METHODS AND MATERIALS: Patients with primary lung cancer treated with SBRT were identified from a multi-institutional (5 institutions) database of 1083 cases. Details of patient factors, treatment specifics, toxicity, and clinical outcomes were extracted from the database. All events were calculated from the end of radiation therapy...
January 9, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28258899/are-future-radiation-oncologists-equipped-with-the-knowledge-to-manage-elderly-patients-with-cancer
#4
Lucinda Morris, Niluja Thiruthaneeswaran, Margot Lehman, Gina Hasselburg, Sandra Turner
PURPOSE: To assess radiation oncology (RO) trainee knowledge, attitudes, and clinical practice relating to geriatric oncology. METHODS AND MATERIALS: A custom online survey was anonymously administered to RO trainees across Australia, New Zealand, and Singapore. The survey assessed 3 domains: (1) trainee demographics and prior training in geriatric medicine; (2) current clinical practice and attitudes regarding elderly cancer patients and radiation therapy; and (3) opinions regarding educational opportunities around geriatric oncology...
January 9, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28258895/re-evaluation-of-ipsilateral-radiation-for-t1-t2n0-n2b-tonsil-carcinoma-at-the-princess-margaret-hospital-in-the-human-papillomavirus-era-25%C3%A2-years-later
#5
Shao Hui Huang, John Waldron, Scott V Bratman, Jie Su, John Kim, Andrew Bayley, John Cho, Meredith Giuliani, Andrew Hope, Jolie Ringash, Aaron Hansen, John R de Almeida, David Goldstein, Bayardo Perez-Ordonez, Ilan Weinreb, Li Tong, Wei Xu, Brian O'Sullivan
PURPOSE: To report the outcome of ipsilateral radiation therapy (RT) in human papillomavirus (HPV)-positive (HPV+) patients and HPV-negative (HPV-) patients with T1-T2N0-N2b tonsillar cancer treated 25 years after our initial historical cohort. METHODS AND MATERIALS: Patients with T1-T2N0-N2b tonsillar cancer who received ipsilateral RT or bilateral RT between 1999 and 2014 were reviewed. Overall survival (OS), local control (LC), regional control (RC), and grade 3 to 4 late toxicity (LT) were compared between ipsilateral RT and bilateral RT within HPV+ and HPV- patients, separately...
January 9, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28258892/effect-of-intensity-modulated-radiation-therapy-with-concurrent-chemotherapy-on-survival-for-patients-with-cervical-esophageal-carcinoma
#6
Lachlan J McDowell, Shao Hui Huang, Wei Xu, Jiahua Che, Rebecca K S Wong, James Brierley, John Kim, Bernard Cummings, John Waldron, Andrew Bayley, Aaron Hansen, Ian Witterick, Jolie Ringash
PURPOSE: We evaluated the effect of consecutive protocols on overall survival (OS) for cervical esophageal carcinoma (CEC). METHODS AND MATERIALS: All CEC cases that received definitive radiation therapy (RT) with or without chemotherapy from 1997 to 2013 in 3 consecutive protocols were reviewed. Protocol 1 (P1) consisted of 2-dimensional RT of 54 Gy in 20 fractions with 5-fluorouracil plus either mitomycin C or cisplatin. Protocol 2 (P2) consisted of 3-dimensional conformal RT (3DRT) of ≥60 Gy in 30 fractions plus elective nodal irradiation plus cisplatin...
January 9, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28258896/the-impact-of-intensity-modulated-radiation-therapy-on-hospitalization-outcomes-in-the-seer-medicare-population-with-anal-squamous-cell-carcinoma
#7
Erqi L Pollom, Guanying Wang, Jeremy P Harris, Albert C Koong, Eran Bendavid, Jay Bhattacharya, Daniel T Chang
PURPOSE: We examined the impact of intensity modulated radiation therapy (IMRT) on hospitalization rates in the Surveillance, Epidemiology, and End Results (SEER)-Medicare population with anal squamous cell carcinoma (SCC). METHODS AND MATERIALS: We performed a retrospective cohort study using the SEER-Medicare database. We identified patients with nonmetastatic anal SCC diagnosed between 2001 and 2011 and treated with chemoradiation therapy. We assessed the relation between IMRT and first hospitalization by use of a multivariate competing-risk model, as well as instrumental variable analysis, using provider IMRT affinity as our instrument...
January 7, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28258894/pan-cancer-analysis-of-genomic-sequencing-among-the-elderly
#8
Daniel R Wahl, Paul L Nguyen, Maria Santiago, Kasra Yousefi, Elai Davicioni, Dean A Shumway, Corey Speers, Rohit Mehra, Felix Y Feng, Joseph R Osborne, Daniel E Spratt
PURPOSE: We hypothesized that elderly patients might have age-specific genetic abnormalities yet be underrepresented in currently available sequencing repositories, which could limit the effect of sequencing efforts for this population. METHODS AND MATERIALS: Leveraging The Cancer Genome Atlas (TCGA) data portal, 9 tumor types were analyzed. The frequency distribution of cancer by age was determined and compared with Surveillance, Epidemiology, and End Results data...
January 7, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28258888/using-proton-beam-therapy-in-the-elderly-population-a-snapshot-of-current-perception-and-practice
#9
Juliette Thariat, Terence Sio, Pierre Blanchard, Samir Patel, Yusuke Demizu, Federico Ampil, Sebastien Guihard, Robert C Miller, Ulf Karlsson, Marco Krengli, Huan Giap, Nam Nguyen
PURPOSE: With limited proton therapy (PT) resources, several centers have designed their own decision-making systems for PT slot prioritization. The pediatric population is well recognized for deriving benefits from PT; however, elderly patients are not a focus for PT. When should PT be considered for use in the elderly population? METHODS AND MATERIALS: We performed a pilot survey of 25 international academic radiation oncologists (ROs) who also spend significant amounts of clinical time caring for elderly patients...
January 6, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28333021/a-phase-1-2-trial-of-a-combination-of-paclitaxel-and-trastuzumab-with-daily-irradiation-or-paclitaxel-alone-with-daily-irradiation-after-transurethral-surgery-for-noncystectomy-candidates-with-muscle-invasive-bladder-cancer-trial-nrg-oncology-rtog-0524
#10
M Dror Michaelson, Chen Hu, Huong T Pham, Douglas M Dahl, Chin Lee-Wu, Gregory P Swanson, Jacqueline Vuky, R Jeffrey Lee, Luis Souhami, Brian Chang, Asha George, Howard Sandler, William Shipley
PURPOSE: Bladder preservation therapy is an effective treatment for muscle-invasive urothelial carcinoma (UC). In this study we treated noncystectomy candidates with daily radiation and weekly paclitaxel for 7 weeks. Patients whose tumors showed her2/neu overexpression were additionally treated with weekly trastuzumab. METHODS AND MATERIALS: Sixty-eight evaluable patients were treated with radiation therapy and either paclitaxel + trastuzumab (group 1) or paclitaxel alone (group 2)...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28333020/-18-f-choline-positron-emission-tomography-computed-tomography-and-multiparametric-magnetic-resonance-imaging-for-the-detection-of-early-local-recurrence-of-prostate-cancer-initially-treated-by-radiation-therapy-comparison-with-systematic-3-dimensional-transperineal
#11
Salim Kanoun, Paul Walker, Jean-Marc Vrigneaud, Edouard Depardon, Vincent Barbier, Olivier Humbert, Morgan Moulin, Gilles Créhange, Luc Cormier, Romaric Loffroy, François Brunotte, Alexandre Cochet
PURPOSE: To compare the diagnostic performance of (18)F-fluorocholine positron emission tomography/computed tomography (FCH-PET/CT), multiparametric prostate magnetic resonance imaging (mpMRI), and a combination of both techniques for the detection of local recurrence of prostate cancer initially treated by radiation therapy. METHODS AND MATERIALS: This was a retrospective, single-institution study of 32 patients with suspected prostate cancer recurrence who underwent both FCH-PET/CT and 3T mpMRI within 3 months of one another for the detection of recurrence...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28333019/a-comparison-between-low-dose-rate-brachytherapy-with-or-without-androgen-deprivation-external-beam-radiation-therapy-with-or-without-androgen-deprivation-and-radical-prostatectomy-with-or-without-adjuvant-or-salvage-radiation-therapy-for-high-risk-prostate
#12
Jay P Ciezki, Michael Weller, Chandana A Reddy, Jeffrey Kittel, Harguneet Singh, Rahul Tendulkar, Kevin L Stephans, James Ulchaker, Kenneth Angermeier, Andrew Stephenson, Steven Campbell, Georges-Pascal Haber, Eric A Klein
PURPOSE: We compare the efficacy and toxicity among the 3 major modalities available used to treat high-risk prostate cancer (HRCaP). METHODS AND MATERIALS: From 1996 to 2012, 2557 HRCaP patients were treated: 734 received external beam radiation therapy (EBRT) with or without androgen deprivation therapy (ADT), 515 received low-dose-rate prostate brachytherapy (LDR) with or without ADT, and 1308 received radical prostatectomy (RP) with or without EBRT. Biochemical relapse-free survival (bRFS), clinical relapse-free survival (cRFS), and prostate cancer-specific mortality (PCSM) were assessed...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28333018/nationwide-multicenter-retrospective-study-on-high-dose-rate-brachytherapy-as-monotherapy-for-prostate-cancer
#13
Yasuo Yoshioka, Tadayuki Kotsuma, Akira Komiya, Shinji Kariya, Koji Konishi, Norio Nonomura, Kazuhiko Ogawa, Eiichi Tanaka, Kensaku Nishimura, Yasuyoshi Fujiuchi, Hiroshi Kitamura, Takuji Yamagami, Ichiro Yamasaki, Kazuo Nishimura, Teruki Teshima, Katsumasa Nakamura, Jun Itami
PURPOSE: To present, analyze, and discuss results of a nationwide, multicenter, retrospective study on high-dose-rate brachytherapy (HDR-BT) as monotherapy for low-, intermediate-, and high-risk prostate cancer. METHODS AND MATERIALS: From 1995 through 2013, 524 patients, 73 (14%) with low-risk, 207 (40%) with intermediate-risk, and 244 (47%) with high-risk prostate cancer, were treated with HDR-BT as monotherapy at 5 institutions in Japan. Dose fractionations were 27 Gy/2 fractions for 69 patients (13%), 45...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28333017/effect-of-prostate-magnetic-resonance-imaging-ultrasound-fusion-guided-biopsy-on-radiation-treatment-recommendations
#14
Aaron Reed, Luca F Valle, Uma Shankavaram, Andra Krauze, Aradhana Kaushal, Erica Schott, Theresa Cooley-Zgela, Bradford Wood, Peter Pinto, Peter Choyke, Baris Turkbey, Deborah E Citrin
PURPOSE: Targeted magnetic resonance imaging (MRI)/ultrasound fusion prostate biopsy (MRI-Bx) has recently been compared with the standard of care extended sextant ultrasound-guided prostate biopsy (SOC-Bx), with the former associated with an increased rate of detection of clinically significant prostate cancer. The present study sought to determine the influence of MRI-Bx on radiation therapy and androgen deprivation therapy (ADT) recommendations. METHODS AND MATERIALS: All patients who had received radiation treatment and had undergone SOC-Bx and MRI-Bx at our institution were included...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28333016/predictors-of-liver-toxicity-following-stereotactic-body-radiation-therapy-for-hepatocellular-carcinoma
#15
Michael Velec, Carol R Haddad, Tim Craig, Lisa Wang, Patricia Lindsay, James Brierley, Anthony Brade, Jolie Ringash, Rebecca Wong, John Kim, Laura A Dawson
PURPOSE: To identify risk factors associated with a decline in liver function after stereotactic body radiation therapy (SBRT) for hepatocellular carcinoma. METHODS AND MATERIALS: Data were analyzed from patients with hepatocellular carcinoma treated on clinical trials of 6-fraction SBRT. Liver toxicity was defined as an increase in Child-Pugh (CP) score ≥2 three months after SBRT. Clinical factors, SBRT details, and liver dose-volume histogram (DVH) parameters were tested for association with toxicity using logistic regression...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28333015/role-of-stereotactic-body-radiation-therapy-before-orthotopic-liver-transplantation-retrospective-evaluation-of-pathologic-response-and-outcomes
#16
Edward Michael Mannina, Higinia Rosa Cardenes, Foster D Lasley, Benjamin Goodman, Jennifer Zook, Sandra Althouse, John Alvin Cox, Romil Saxena, Joseph Tector, Mary Maluccio
PURPOSE: To analyze the results of stereotactic body radiation therapy (SBRT) in patients with early-stage, localized hepatocellular carcinoma who underwent definitive orthotopic liver transplantation (OLT). METHODS AND MATERIALS: The subjects of this retrospective report are 38 patients diagnosed with hepatocellular carcinoma who underwent SBRT per institutional phase 1 to 2 eligibility criteria, before definitive OLT. Pre-OLT radiographs were compared with pathologic gold standard...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28333014/single-nucleotide-polymorphism-tgf%C3%AE-1-r25p-correlates-with-acute-toxicity-during-neoadjuvant-chemoradiotherapy-in-rectal-cancer-patients
#17
J Joshua Smith, Isaac Wasserman, Sarah A Milgrom, Oliver S Chow, Chin-Tung Chen, Sujata Patil, Karyn A Goodman, Julio Garcia-Aguilar
PURPOSE: To validate the finding of an association between single nucleotide polymorphisms (SNPs) and toxicity during chemoradiotherapy (CRT) in rectal cancer patients, in an independent population. METHODS AND MATERIALS: The cohort consisted of 165 patients who received CRT for rectal cancer from 2006 to 2012. Prospectively recorded toxicity information, graded according to the Common Terminology Criteria for Adverse Events version 3.0, was retrieved from the medical record...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28333013/the-risk-of-radiation-induced-tumors-or-malignant-transformation-after-single-fraction-intracranial-radiosurgery-results-based-on-a-25-year-experience
#18
Bruce E Pollock, Michael J Link, Scott L Stafford, Ian F Parney, Yolanda I Garces, Robert L Foote
PURPOSE: To determine the risk of radiation-induced tumors or malignant transformation after single-fraction intracranial stereotactic radiosurgery (SRS). METHODS AND MATERIALS: We performed a retrospective review of 1837 patients who received single-fraction SRS for arteriovenous malformation or benign tumor (meningioma, vestibular schwannoma, pituitary adenoma, glomus tumor) at a single center between 1990 and 2009. Patients were excluded if they refused research authorization (n=31), had a genetic predisposition to tumor development (n=84), received prior or concurrent radiation therapy (n=79), or had less than 5 years of imaging follow-up after SRS (n=501)...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28333012/cerebral-cortex-regions-selectively-vulnerable-to-radiation-dose-dependent-atrophy
#19
Tyler M Seibert, Roshan Karunamuni, Samar Kaifi, Jeffrey Burkeen, Michael Connor, Anitha Priya Krishnan, Nathan S White, Nikdokht Farid, Hauke Bartsch, Vyacheslav Murzin, Tanya T Nguyen, Vitali Moiseenko, James B Brewer, Carrie R McDonald, Anders M Dale, Jona A Hattangadi-Gluth
PURPOSE AND OBJECTIVES: Neurologic deficits after brain radiation therapy (RT) typically involve decline in higher-order cognitive functions such as attention and memory rather than sensory defects or paralysis. We sought to determine whether areas of the cortex critical to cognition are selectively vulnerable to radiation dose-dependent atrophy. METHODS AND MATERIALS: We measured change in cortical thickness in 54 primary brain tumor patients who underwent fractionated, partial brain RT...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28333011/utility-of-deep-inspiration-breath-hold-for-left-sided-breast-radiation-therapy-in-preventing-early-cardiac-perfusion-defects-a-prospective-study
#20
Timothy M Zagar, Orit Kaidar-Person, Xiaoli Tang, Ellen E Jones, Jason Matney, Shiva K Das, Rebecca L Green, Arif Sheikh, Amir H Khandani, William H McCartney, Jorge Daniel Oldan, Terence Z Wong, Lawrence B Marks
PURPOSE: To evaluate early cardiac single photon computed tomography (SPECT) findings after left breast/chest wall postoperative radiation therapy (RT) in the setting of deep inspiration breath hold (DIBH). METHODS AND MATERIALS: We performed a prospective single-institution single-arm study of patients who were planned for tangential RT with DIBH to the left breast/chest wall (± internal mammary nodes). The DIBH was done by use of a controlled surface monitoring technique (AlignRT, Vision RT Ltd, London, UK)...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
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