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Hypofractionation

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https://www.readbyqxmd.com/read/28325618/thoracic-irradiation-in-3weeks-for-limited-stage-small-cell-lung-cancer-is-twice-a-day-fractionation-really-needed
#1
G A Turgeon, L Souhami, N Kopek, V Hirsh, L Ofiara, S L Faria
PURPOSE: Many Canadian institutions treat limited-disease small cell lung cancer with 40Gy in 15 fractions delivered once-a-day in 3weeks concomitantly with chemotherapy. This regimen is convenient and seems to be effective. Here, we report and compare with a literature review the outcomes of patients with limited-stage small cell lung cancer treated in our institution with this hypofractionated regimen. PATIENTS AND METHODS: From January 2004 to December 2012, patients with limited-stage small cell lung cancer treated curatively with platinum-based chemotherapy and concurrent thoracic radiotherapy at a dose of 40Gy in 16 fractions once-a-day were eligible for this review...
March 18, 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28314468/constraints-for-symptomatic-radiation-pneumonitis-of-helical-tomotherapy-hypofractionated-simultaneous-multitarget-radiotherapy-for-pulmonary-metastasis-from-hepatocellular-carcinoma
#2
Genlai Lin, Han Xiao, Zhaochong Zeng, Zhiyong Xu, Jian He, Taiwei Sun, Jin Liu, Genwu Guo, Weixing Ji, Yong Hu
BACKGROUND AND PURPOSE: This study was aimed to identify the clinical and dosimetric parameters that predict symptomatic radiation pneumonitis (SRP, radiation pneumonitis≥2 grade) in patients with pulmonary metastasis from hepatocellular carcinoma (HCC) after helical tomotherapy (HT) hypofractionated simultaneous multitarget radiotherapy. MATERIALS AND METHODS: 62 patients with 407 pulmonary metastases from HCC were consecutively treated with HT. The median radiation dose was a 49...
March 14, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28314317/statins-protect-against-acute-rt-related-rectal-toxicity-in-patients-with-prostate-cancer-an-observational-prospective-study
#3
Isabella Palumbo, Fabio Matrone, Giampaolo Montesi, Rita Bellavita, Marco Lupattelli, Simonetta Saldi, Alessandro Frattegiani, Eleonora Arena, Cristina Mariucci, Lorenzo Falcinelli, Vittorio Bini, Cynthia Aristei
AIM: To analyze risk factors for acute rectal toxicity during hypofractionated intensity-modulated radiotherapy (IMRT) for prostate cancer. PATIENTS AND METHODS: A total of 195 patients received 74.25 Gy in 33 fractions to the prostate and, if involved, to the seminal vescicles (SV). When the risk of SV involvement was >15% according to the Roach's formula, they received 62 Gy in 33 fractions. Overall, 107/195 patients (54.87%) received hormonal therapy (luteinizing hormone-releasing hormone analogue, anti-androgen, or both)...
March 2017: Anticancer Research
https://www.readbyqxmd.com/read/28314273/failure-of-inositol-trispyrophosphate-to-enhance-highly-effective-radiotherapy-of-gl261-glioblastoma-in-mice
#4
Sujatha Iyengar, David Schwartz
BACKGROUND/AIM: Inositol trispyrophosphate (ITPP), reported to cure hepatomas in a preclinical rat model and to have beneficial effects in several other solid tumor models, is currently in clinical trial for liver cancer. We investigated whether aggressive glioblastomas could be effectively treated with ITPP alone or in combination with radiation therapy (RT). MATERIALS AND METHODS: C57Bl/6 mice were intracranially injected with syngeneic GL261 glioblastoma cells and treated with hypofractionated radiation (5 Gy × 3), ITPP, or both...
March 2017: Anticancer Research
https://www.readbyqxmd.com/read/28303210/stereotactic-spine-radiosurgery-review-of-safety-and-efficacy-with-respect-to-dose-and-fractionation
#5
REVIEW
Michael Huo, Arjun Sahgal, David Pryor, Kristin Redmond, Simon Lo, Matthew Foote
BACKGROUND: Stereotactic body radiotherapy (SBRT) is an emerging treatment option for spinal metastases with demonstrated efficacy in the upfront, postoperative, and re-treatment settings, as well as for tumor histologies considered radioresistant. Uncertainty exists regarding the optimal dose and fractionation schedule, with single and multifraction regimens commonly utilized. METHODS: A literature search of the PubMed and Medline databases was conducted to identify papers specific to spine SBRT and the effect of varying dose/fractionation regimens on outcomes...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28300373/sum-signal-dosimetry-a-new-approach-for-high-dose-quality-assurance-with-gafchromic-ebt3
#6
Davide Cusumano, Maria Luisa Fumagalli, Francesco Ghielmetti, Linda Rossi, Giuliano Grossi, Raffaella Lanzarotti, Laura Fariselli, Elena De Martin
Gafchromic EBT3 film dosimetry in radiosurgery (RS) and hypofractionated radiotherapy (HRT) is complicated by the limited film accuracy at high fractional doses. The aim of this study is to develop and evaluate sum signal (SS) film dosimetry to increase dose resolution at high fractional doses, thus allowing for use of EBT3 for dose distribution verification of RS/HRT treatments. To characterize EBT3 dose-response, a calibration was performed in the dose range 0.44-26.43 Gy. Red (RC) and green (GC) channel net optical densities were linearly added to produce the SS...
March 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28298046/hypofractionated-stereotactic-radiosurgery-a-new-treatment-strategy-for-giant-cavernous-sinus-hemangiomas
#7
Xin Wang, Huaguang Zhu, Jonathan Knisely, Guanghai Mei, Xiaoxia Liu, Jiazhong Dai, Ying Mao, Li Pan, Zhiyong Qin, Enmin Wang
OBJECTIVE Cavernous sinus hemangiomas (CSHs) are rare benign vascular tumors that arise from the dural venous sinuses lateral to the sella. Stereotactic radiosurgery (SRS) has emerged as a principal alternative to microresection for small- and medium-sized CSHs. Resection is a reasonable option for large (3-4 cm in diameter) and giant (> 4 cm in diameter) CSHs. However, management of giant CSHs remains a challenge for neurosurgeons because of the high rates of morbidity and even death that stem from uncontrollable and massive hemorrhage during surgery...
March 10, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28297298/dosimetric-and-volumetric-changes-in-the-rectum-and-bladder-in-patients-receiving-cbct-guided-prostate-imrt-analysis-based-on-daily-cbct-dose-calculation
#8
David Pearson, Sukhdeep K Gill, Nina Campbell, Krishna Reddy
Delivered dose can be calculated by transferring the planned treatment beams onto the daily CBCT. Bladder and rectum volumetric doses were calculated and correlated to the daily bladder and rectum fullness. Patients for this study underwent hypofractionated prostate IMRT to 70 Gy in 28 fractions. Daily CBCT was utilized for image guidance. A clinically acceptable plan was created using a CTV-to-PTV uniform margin of 5 mm. Image fusion was performed to transfer the bladder and rectum contours onto each CBCT...
November 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28296582/randomized-trial-of-a-hypofractionated-radiation-regimen-for-the-treatment-of-localized-prostate-cancer
#9
Charles N Catton, Himu Lukka, Chu-Shu Gu, Jarad M Martin, Stéphane Supiot, Peter W M Chung, Glenn S Bauman, Jean-Paul Bahary, Shahida Ahmed, Patrick Cheung, Keen Hun Tai, Jackson S Wu, Matthew B Parliament, Theodoros Tsakiridis, Tom B Corbett, Colin Tang, Ian S Dayes, Padraig Warde, Tim K Craig, Jim A Julian, Mark N Levine
Purpose Men with localized prostate cancer often are treated with external radiotherapy (RT) over 8 to 9 weeks. Hypofractionated RT is given over a shorter time with larger doses per treatment than standard RT. We hypothesized that hypofractionation versus conventional fractionation is similar in efficacy without increased toxicity. Patients and Methods We conducted a multicenter randomized noninferiority trial in intermediate-risk prostate cancer (T1 to 2a, Gleason score ≤ 6, and prostate-specific antigen [PSA] 10...
March 15, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28294289/hypofractionated-radiotherapy-in-older-patients-with-non-melanoma-skin-cancer-less-is-better
#10
Michael Veness
Radiotherapy is a non-surgical option for patients with non-melanoma skin cancer. Lesions in middle-aged to older patients with good performance status are typically prescribed 4-5 weeks of outpatient weekday treatment. Daily radiotherapy fraction sizes of 2-3 Gy are recommended to decrease the late cutaneous consequences such as in-field hypopigmentation and telangiectasia. In elderly, often unwell patients, these concerns are less of an issue and larger fraction sizes (5-7 Gy), referred to as hypofractionation, can be delivered over a shorter time yet still achieve excellent in-field control and improve a patient's quality of life and avoid the need for surgery...
March 9, 2017: Australasian Journal of Dermatology
https://www.readbyqxmd.com/read/28291382/cost-implications-of-an-evidence-based-approach-to-radiation-treatment-after-lumpectomy-for-early-stage-breast-cancer
#11
Rachel A Greenup, Rachel C Blitzblau, Kevin L Houck, Julie Ann Sosa, Janet Horton, Jeffrey M Peppercorn, Alphonse G Taghian, Barbara L Smith, E Shelley Hwang
INTRODUCTION: Breast cancer treatment costs are rising, and identification of high-value oncology treatment strategies is increasingly needed. We sought to determine the potential cost savings associated with an evidence-based radiation treatment (RT) approach among women with early-stage breast cancer treated in the United States. PATIENTS AND METHODS: Using the National Cancer Database, we identified women with T1-T2 N0 invasive breast cancers treated with lumpectomy during 2011...
March 14, 2017: Journal of Oncology Practice
https://www.readbyqxmd.com/read/28283034/hypo-or-conventionally-fractionated-radiotherapy-combined-with-chemotherapy-in-patients-with-limited-stage-small-cell-lung-cancer
#12
Jing Zhang, Min Fan, Di Liu, Kuai-Le Zhao, Kai-Liang Wu, Wei-Xin Zhao, Zheng-Fei Zhu, Xiao-Long Fu
BACKGROUND: Previous data from our institution showed that hypofractionated thoracic radiotherapy (HypoTRT) with concurrent etoposide/platinum chemotherapy yielded favorable survival in patients with limited-stage small cell lung cancer (LS-SCLC). The present study retrospectively compared the survival outcomes, failure patterns and toxicities between groups of LS-SCLC patients treated with conventionally fractionated thoracic radiotherapy (ConvTRT) or HypoTRT combined with chemotherapy...
March 11, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28281047/acute-and-late-complications-after-hypofractionated-intensity-modulated-radiotherapy-in-prostate-cancer
#13
Takuyo Kozuka, Masahiro Nakano, Masatoshi Hashimoto, Kotaro Gomi, Keiko Nemoto Murofushi, Minako Sumi, Junji Yonese, Masahiko Oguchi
PURPOSE: The present study compared the complications associated with hypofractionated intensity-modulated radiation therapy (Hypo-IMRT) of prostate cancer to conventionally fractionated IMRT (Conv-IMRT). MATERIALS AND METHODS: Hypo-IMRT delivered 70 Gy in 28 fractions, whereas Conv-IMRT delivered 78 Gy in 39 fractions. Toxicity was graded with the Common Terminology Criteria for Adverse Events, version 4.0, weekly during radiotherapy, 1 month after radiotherapy, and annually in both patient groups...
March 9, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28274491/stereotactic-body-radiotherapy-for-oligo-metastatic-liver-disease-influence-of-pre-treatment-chemotherapy-and-histology-on-local-tumor-control
#14
R J Klement, M Guckenberger, H Alheid, M Allgäuer, G Becker, O Blanck, J Boda-Heggemann, T Brunner, M Duma, S Gerum, D Habermehl, G Hildebrandt, V Lewitzki, C Ostheimer, A Papachristofilou, C Petersen, T Schneider, R Semrau, S Wachter, N Andratschke
INTRODUCTION: Stereotactic body radiation therapy (SBRT) is applied in the oligometastatic setting to treat liver metastases. However, factors influencing tumor control probability (TCP) other than radiation dose have not been thoroughly investigated. Here we set out to investigate such factors with a focus on the influence of histology and chemotherapy prior to SBRT using a large multi-center database from the German Society of Radiation Oncology. METHODS: 452 SBRT treatments in 363 patients were analyzed after collection of patient, tumor and treatment data in a multi-center database...
March 5, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28274399/radiation-and-subsequent-reirradiation-outcomes-in-the-treatment-of-diffuse-intrinsic-pontine-glioma-and-a-systematic-review-of-the-reirradiation-literature
#15
Christopher Freese, Vinita Takiar, Maryam Fouladi, Mariko DeWire, John Breneman, Luke Pater
PURPOSE: Diffuse intrinsic pontine glioma (DIPG) is a devastating pediatric disease, with a median survival of <1 year. Here, we review our institution's DIPG experience over an 8-year interval and perform a systematic review of the literature, specifically evaluating reports of reirradiation (reRT) for DIPG. METHODS AND MATERIALS: We retrospectively reviewed the medical records of 26 patients who underwent definitive intensity modulated radiation therapy (IMRT) for DIPG at a single institution between 2007 and 2015...
March 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28271215/moderate-hypofractionated-radiotherapy-with-volumetric-modulated-arc-therapy-and-simultaneous-integrated-boost-for-pelvic-irradiation-in-prostate-cancer
#16
C Franzese, A Fogliata, G R D'Agostino, L Di Brina, T Comito, P Navarria, L Cozzi, M Scorsetti
PURPOSE: The optimal treatment for unfavourable intermediate/high-risk prostate cancer is still debated. In the present study, the pattern of toxicity and early clinical outcome of patients with localized prostate cancer was analyzed. METHODS: A cohort of 90 patients treated on pelvic lymph nodes from 2010 to 2015 was selected. All patients were treated with Volumetric Modulated Arc Therapy (VMAT), and Simultaneous integrated boost (SIB) in 28 fractions; the prostate, the seminal vesicle and the pelvic lymph node received total doses of 74...
March 8, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28270731/guideline-for-radiotherapy-with-curative-intent-in-patients-with-early-stage-medically-inoperable-non-small-cell-lung-cancer
#17
C B Falkson, E T Vella, E Yu, M El-Mallah, R Mackenzie, P M Ellis, Y C Ung
OBJECTIVES: For this guideline, we investigated the effectiveness of radiotherapy with curative intent in medically inoperable patients with early-stage non-small-cell lung cancer (nsclc). METHODS: The guideline was developed by Cancer Care Ontario's Program in Evidence-Based Care and by the Lung Cancer Disease Site Group through a systematic review of mainly retrospective studies, expert consensus, and formal internal and external reviews. RECOMMENDATIONS: ■ Stereotactic body radiation therapy (sbrt) with curative intent is an option that should be considered for patients with early-stage, node-negative, medically inoperable nsclc...
February 2017: Current Oncology
https://www.readbyqxmd.com/read/28267657/preoperative-radiotherapy-in-breast-cancer-patients-32%C3%A2-years-of-follow-up
#18
F G Riet, F Fayard, R Arriagada, M A Santos, C Bourgier, M Ferchiou, S Heymann, S Delaloge, C Mazouni, A Dunant, S Rivera
This study evaluates the long-term outcomes of a retrospective cohort of breast cancer (BC) patients who had received curatively intended premastectomy radiation therapy (RT). We analysed locoregional control, disease-free survival (DFS) and overall survival (OS), pathological complete remission (pCR), predictors thereof, and immediate safety. The series consisted of 187 patients with a median age of 49 years [43-60] and T2-T4 or N2 tumours. Between 1970 and 1984, they had received slightly hypofractionated RT to the whole breast, ipsilateral supraclavicular fossa and axilla ± the internal mammary chain (45-55 Gy/18 fractions of 2...
March 3, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28258888/using-proton-beam-therapy-in-the-elderly-population-a-snapshot-of-current-perception-and-practice
#19
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/28256924/outcome-appraisal-of-patients-with-limited-brain-metastases-bms-from-non-small-cell-lung-cancer-nsclc-treated-with-different-local-therapeutic-strategies-a-single-institute-evaluation
#20
Federico Pessina, Pierina Navarria, Luca Cozzi, Stefano Tomatis, Anna M Ascolese, Ciro Franzese, Luca Toschi, Armando Santoro, Fiorenza De Rose, Davide Franceschini, Lorenzo Bello, Marta Scorsetti
OBJECTIVE: To evaluate the outcome of patients with non-small-cell lung cancer (NSCLC) with limited brain metastases (BMs) treated with local approaches omitting whole-brain radiation therapy (WBRT). METHODS: Surgery was performed in case of a single, large BM, controlled extracranial disease and Karnofsky Performance Status (KPS) 90-100; stereotactic radiosurgery (SRS) or hypofractionated stereotactic radiosurgery (HSRS) was performed in all other cases. The prescribed dose was 24 Gy/1 fraction for lesions <2...
April 2017: British Journal of Radiology
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