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https://www.readbyqxmd.com/read/29465428/recent-advances-in-radiation-oncology-multimodal-targeting-of-high-risk-and-recurrent-prostate-cancer
#1
Young Kwok, Adeel Kaiser, Stephanie R Rice, Randi Cohen, Mark Mishra
PURPOSE OF REVIEW: The overview summarizes recent developments in radiation oncology for high risk and recurrent prostate cancer. RECENT FINDINGS: A number of well known phase III prostate hypofractionated radiation therapy (HFxRT) trials were finally published with long-term follow-ups. These trials demonstrate patterns of equivalent tumor control with several showing worse toxicity rates. The ASCENDE-RT randomized trial demonstrated the superiority of brachytherapy boost in intermediate and high-risk prostate cancer...
February 19, 2018: Current Opinion in Oncology
https://www.readbyqxmd.com/read/29461655/exploring-the-rationale-for-combining-ionizing-radiation-and-immune-checkpoint-blockade-in-head-and-neck-cancer
#2
REVIEW
Megan Morisada, Michael Chamberlin, Clint Allen
BACKGROUND: The ability of radiation to enhance antitumor immunity under specific experimental conditions is well established. Here, we explore preclinical data and the rationale for combining different radiation doses and fractions with immune checkpoint blockade immunotherapy. METHODS: We conducted a review of the literature. RESULTS: The ability of high-dose or hypofractionated radiation to enhance antitumor immunity resulting in additive or synergistic tumor control when combined with checkpoint blockade is well studied...
February 20, 2018: Head & Neck
https://www.readbyqxmd.com/read/29452863/chest-wall-toxicity-after-hypofractionated-proton-beam-therapy-for-liver-malignancies
#3
Rosanna Yeung, Stephen R Bowen, Tobias R Chapman, Grayden T MacLennan, Smith Apisarnthanarax
PURPOSE: Normal liver-sparing with proton beam therapy (PBT) allows for dose escalation in the treatment of liver malignancies, but it may result in high doses to the chest wall (CW). CW toxicity (CWT) data after PBT for liver malignancies are limited, with most published reports describing toxicity after a combination of hypofractionated proton and photon radiation therapy. We examined the incidence and associated factors for CWT after hypofractionated PBT for liver malignancies. METHODS AND MATERIALS: We retrospectively reviewed the charts of 37 consecutive patients with liver malignancies (30 hepatocellular carcinoma, 6 intrahepatic cholangiocarcinoma, and 1 metastasis) treated with hypofractionated PBT...
December 24, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/29450592/under-reported-dosimetry-errors-due-to-interplay-effects-during-vmat-dose-delivery-in-extreme-hypofractionated-stereotactic-radiotherapy
#4
Tobias Gauer, Thilo Sothmann, Oliver Blanck, Cordula Petersen, René Werner
BACKGROUND AND PURPOSE: Radiotherapy of extracranial metastases changed from normofractioned 3D CRT to extreme hypofractionated stereotactic treatment using VMAT beam techniques. Random interaction between tumour motion and dynamically changing beam parameters might result in underdosage of the CTV even for an appropriately dimensioned ITV (interplay effect). This study presents a clinical scenario of extreme hypofractionated stereotactic treatment and analyses the impact of interplay effects on CTV dose coverage...
February 15, 2018: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/29445299/choosing-wisely-after-publication-of-level-i-evidence-in-breast-cancer-radiotherapy
#5
Joshua R Niska, Sameer R Keole, Barbara A Pockaj, Michele Y Halyard, Samir H Patel, Donald W Northfelt, Richard J Gray, Nabil Wasif, Carlos E Vargas, William W Wong
Background: Recent trials in early-stage breast cancer support hypofractionated whole-breast radiotherapy (WBRT) as part of breast-conserving therapy (BCT). Evidence also suggests that radiotherapy (RT) omission may be reasonable for some patients over 70 years. Among radiation-delivery techniques, intensity-modulated RT (IMRT) is more expensive than 3-dimensional conformal RT (3DCRT). Based on this evidence, in 2013, the American Society for Radiation Oncology (ASTRO) recommended hypofractionated schedules for women aged ≥50 years with early-stage breast cancer and avoiding routine use of IMRT for WBRT...
2018: Breast Cancer: Targets and Therapy
https://www.readbyqxmd.com/read/29444157/does-radiation-therapy-increase-gadolinium-accumulation-in-the-brain-quantitative-analysis-of-t1-shortening-using-r1-relaxometry-in-glioblastoma-multiforme-patients
#6
Woo Hyeon Lim, Seung Hong Choi, Roh-Eul Yoo, Koung Mi Kang, Tae Jin Yun, Ji-Hoon Kim, Chul-Ho Sohn
OBJECTIVE: This study evaluated the possibility of accelerated gadolinium accumulation in irradiated brain parenchyma where the blood-brain barrier was weakened. METHODS: From January 2010 to June 2015, 44 patients with supratentorial glioblastoma were retrospectively identified who underwent pre- and post-radiation brain MR imaging, including R1 mapping. The mean dose of administered gadobutrol (Gadovist, Bayer, Germany) was 5.1 vials. Regions of interest (ROIs) were drawn around tumors that were located within 50-100% iso-dose lines of maximum radiation dose...
2018: PloS One
https://www.readbyqxmd.com/read/29442173/hypofractionated-postmastectomy-radiotherapy-with-helical-tomotherapy-in-patients-with-immediate-breast-reconstruction-dosimetric-results-and-acute-intermediate-toxicity-evaluation
#7
Roberto Orecchia, Damaris Patricia Rojas, Federica Cattani, Rosalinda Ricotti, Luigi Santoro, Anna Morra, Raffaella Cambria, Rosa Luraschi, Samantha Dicuonzo, Sara Ronchi, Alessia Surgo, Veronica Dell' Acqua, Paolo Veronesi, Francesca De Lorenzi, Cristiana Fodor, Maria Cristina Leonardi, Barbara Alicja Jereczek-Fossa
The aim of this study was to evaluate the dosimetry and toxicity of hypofractionation in postmastectomy radiotherapy (PMRT) with intensity-modulated radiotherapy (IMRT) in breast cancer (BC) patients. Stage II-III BC patients with implant-based immediate breast reconstruction received PMRT to the chest wall (CW) and to the infra/supraclavicular nodal region (NR) using a 15-fraction schedule (2.67 Gy/fraction) and helical IMRT (Tomotherapy®System, Accuray Incorporated, Sunnyvale, CA). A score was assigned to each treatment plan in terms of planning target volume (PTV) coverage of CW and NR and the sparing of the organs at risk (OARs)...
February 13, 2018: Medical Oncology
https://www.readbyqxmd.com/read/29441697/long-term-outcomes-of-proton-therapy-for-prostate-cancer-in-japan-a-multi-institutional-survey-of-the-japanese-radiation-oncology-study-group
#8
Hiromitsu Iwata, Hitoshi Ishikawa, Masaru Takagi, Tomoaki Okimoto, Sigeyuki Murayama, Tetsuo Akimoto, Hitoshi Wada, Takeshi Arimura, Yoshitaka Sato, Masayuki Araya, Jun-Etsu Mizoe, Masahiko Gosho, Katsumasa Nakamura, Hiroki Shirato, Hideyuki Sakurai
This is the first multi-institutional retrospective survey of the long-term outcomes of proton therapy (PT) for prostate cancer in Japan. This retrospective analysis comprised prostate cancer patients treated with PT at seven centers between January 2008 and December 2011 and was approved by each Institutional Review Board. The NCCN classification was used. Biochemical relapse was based on the Phoenix definition (nadir + 2.0 ng/mL). Toxicities were evaluated with the Common Terminology Criteria for Adverse Events version 4...
February 14, 2018: Cancer Medicine
https://www.readbyqxmd.com/read/29441101/high-dose-rate-brachytherapy-in-the-treatment-of-skin-kaposi-sarcoma
#9
María Ángeles González Ruiz, Juan Quirós Rivero, Julia Luisa Muñoz García, Joaquín José Cabrera Rodríguez, Yesika Ríos Kavadoy, María Francisca Ropero Carmona, Almudena Corbacho Campos, Fernando García Urra, María Cristina Cruz Muñoz, Amanda Ruiz Herrero, Pedro Almendral Manzano
Purpose: The aim of the study is to review our experience in treatment of Kaposi sarcoma (KS) lesions with high-dose-rate (HDR) brachytherapy. Material and methods: We present five new KS lesions (three patients) that were treated in our hospital from May 2016 to February 2017 with HDR brachytherapy using Valencia applicators. The treatment was delivered in 5 Gy fractions over five sessions, on alternate days. Total dose of 25 Gy (EQD2 31.25 Gy) was delivered. All patients were male, Caucasian, without a history of HIV, organ transplantation, or current immunosuppressive therapy...
December 2017: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/29436852/comparing-photon-and-proton-based-hypofractioned-sbrt-for-prostate-cancer-accounting-for-robustness-and-realistic-treatment-deliverability
#10
Lee Goddard, Nils P Brodin, William R Bodner, Madhur Garg, Wolfgang A Tomé
OBJECTIVE: To investigate whether photon or proton based SBRT is the preferred modality for high dose hypofractionation prostate cancer treatment. Achievable dose distributions were compared when uncertainties in target positioning and range uncertainties were appropriately accounted for. METHODS: Ten patients with prostate cancer previously treated at our institution with photon SBRT using volumetric modulated arc therapy (VMAT) were identified. MRI images fused to the treatment planning CT allowed for accurate target and organ-at-risk (OAR) delineation...
February 13, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29436186/hypofractionated-re-irradiation-after-maximal-surgical-resection-for-recurrent-glioblastoma-therapeutic-adequacy-and-its-prognosticators-of-survival
#11
Jeongshim Lee, Sung Soo Ahn, Jong Hee Chang, Chang Ok Suh
PURPOSE: To evaluate the adequacy of retreatment, including hypofractionated re-irradiation (HFReRT), after surgery for recurrent glioblastoma (GBM) and related prognosticators of outcomes. MATERIALS AND METHODS: From 2011 to 2014, 25 consecutive patients with recurrent (n=17) or secondary (n=7) disease underwent maximal surgery and subsequent HFReRT after meeting the following conditions: 1) confirmation of recurrent or secondary GBM after salvage surgery; 2) Karnofsky performance score (KPS) ≥60; and 3) interval of ≥12 months between initial radiotherapy and HFReRT...
March 2018: Yonsei Medical Journal
https://www.readbyqxmd.com/read/29436171/ischaemic-heart-disease-following-conventional-and-hypofractionated-radiation-treatment-in-a-contemporary-breast-cancer-series
#12
Melissa James, Sami Swadi, Ma Yi, Lisa Johansson, Bridget Robinson, Ashutosh Dixit
INTRODUCTION: We report the incidence of ischaemic cardiac toxicity in a contemporary cohort of patients receiving conventional (CFRT) or hypofractionated (HFRT) radiation after surgery for early breast cancer and investigate the interplay of cardiac risk factors and fractionation. METHODS: Included were patients receiving external beam radiation treatment from 2002 to 2006 at the Christchurch public hospital. Hospital coding databases, oncology databases and medical records were reviewed for baseline characteristics, treatment details and outcomes...
February 13, 2018: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/29423102/optimal-time-of-tumour-response-evaluation-and-effectiveness-of-hypofractionated-proton-beam-therapy-for-inoperable-or-recurrent-hepatocellular-carcinoma
#13
Tae Hyun Kim, Joong-Won Park, Bo Hyun Kim, Dae Yong Kim, Sung Ho Moon, Sang Soo Kim, Ju Hee Lee, Sang Myung Woo, Young-Hwan Koh, Woo Jin Lee, Chang-Min Kim
Objective: To evaluate the optimal time of tumour response and effectiveness of hypofractionated proton beam therapy (PBT) for hepatocellular carcinoma (HCC). Results: Overall, treatment was well tolerated with no grade toxicity ≥3. Of 71 patients, 66 patients (93%) eventually reached complete response (CR) after PBT: 93.9% (62 of 66) of patients who reached CR within 12 months, and the remaining 4 patients (6.1%) reached CR at 12.5, 16.2, 19.1 and 21.7 months, respectively...
January 9, 2018: Oncotarget
https://www.readbyqxmd.com/read/29413285/normal-tissue-complication-probability-modeling-of-pulmonary-toxicity-after-stereotactic-and-hypofractionated-radiation-therapy-for-central-lung-tumors
#14
H Tekatli, M Duijm, E Oomen-de Hoop, W Verbakel, W Schillemans, B J Slotman, J J Nuyttens, S Senan
PURPOSE: To evaluate clinical pulmonary and radiographic bronchial toxicity after stereotactic ablative radiation therapy and hypofractionated radiation therapy for central lung tumors, and perform normal tissue complication probability modeling and multivariable analyses to identify predictors for toxicity. METHODS AND MATERIALS: A pooled analysis was performed of patients with a central lung tumor treated using ≤12 fractions at 2 centers between 2006 and 2015...
March 1, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29413273/safety-and-efficacy-of-accelerated-hypofractionation-and-stereotactic-body-radiation-therapy-for-hepatocellular-carcinoma-patients-with-varying-degrees-of-hepatic-impairment
#15
Nima Nabavizadeh, Joseph G Waller, Robert Fain, Yiyi Chen, Catherine R Degnin, David A Elliott, Brandon T Mullins, Ishan A Patel, Brandon A Dyer, Kareem Fakhoury, Willscott E Naugler, Khashayar Farsad, James A Tanyi, Martin Fuss, Charles R Thomas, Arthur Y Hung
PURPOSE: To report the toxicities and outcomes for stereotactic body radiation therapy (SBRT) and accelerated hypofractionated radiation therapy (AHRT) in patients with Child-Pugh (CP) class A, B, or C and albumin-bilirubin (ALBI) score 1, 2, or 3 hepatocellular carcinoma. METHODS AND MATERIALS: We retrospectively reviewed the data from 146 patients with hepatocellular carcinoma who had undergone SBRT (50 Gy in 5 fractions) or AHRT (45 Gy in 18 fractions). The primary endpoint was liver toxicity, defined as an increase in the CP score of ≥2 within 6 months of radiation therapy...
March 1, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29405785/clinical-estimation-of-%C3%AE-%C3%AE-values-for-prostate-cancer-from-isoeffective-phase-iii-randomized-trials-with-moderately-hypofractionated-radiotherapy
#16
Niloy R Datta, Emanuel Stutz, Susanne Rogers, Stephan Bodis
BACKGROUND: The α/β values for prostate cancer (PCa) are usually assumed to be low (1.0-1.8 Gy). This study estimated the α/β values of PCa from phase III randomized trials of conventional (CRT) versus hypofractionated (HRT) external beam radiotherapy (RT), reported as isoeffective in terms of their 5-year biochemical (BF) or biochemical and/or clinical failure (BCF) rates. MATERIAL AND METHODS: The α/β for each trial was estimated from the equivalent biological effective doses using the linear-quadratic model for each of their HRT and CRT schedules...
February 6, 2018: Acta Oncologica
https://www.readbyqxmd.com/read/29404305/profile-of-patients-undergoing-palliative-radiotherapy-a-single-institute-study-from-a-tertiary-care-oncology-center
#17
Virender Suhag, B S Sunita, Pankaj Vats, Nilotpal Chakravarty, Mayuri Jain, Rekha S Vashisht
Background: Palliative radiotherapy (PRT) plays a significant role in the palliation of symptoms in patients with cancer and constitutes nearly 50% of the workload in different settings. Aims: The aim is to study patient-, disease-, and treatment-related characteristics in locoregionally advanced and metastatic malignancies meriting palliative management. Setting and Design: This was a retrospective observational study in a tertiary care government institute with academic and research potential...
October 2017: South Asian Journal of Cancer
https://www.readbyqxmd.com/read/29399395/tumor-lymphocyte-immune-response-to-preoperative-radiotherapy-in-locally-advanced-rectal-cancer-the-lymphorec-study
#18
C Mirjolet, C Charon-Barra, S Ladoire, F Arbez-Gindre, A Bertaut, F Ghiringhelli, A Leroux, D Peiffert, C Borg, J F Bosset, G Créhange
Introduction: Some studies have suggested that baseline tumor-infiltrating-lymphocytes (TILs), such as CD8+ and FoxP3+ T-cells, may be associated with a better prognosis in colorectal cancer. We sought to investigate modulation of the immune response by preoperative radiotherapy (preopRT) and its impact on survival in locally advanced rectal cancer (LARC). Materials & Methods: We analyzed data for 237 patients with LARC who received RT. Density of TILS (CD8+ and FoxP3+) in intraepithelial (iTILs) and stromal compartments (sTILs) were evaluated from surgery pathological specimens and biopsies performed at baseline...
2018: Oncoimmunology
https://www.readbyqxmd.com/read/29399393/pd-1-blockade-reverses-adaptive-immune-resistance-induced-by-high-dose-hypofractionated-but-not-low-dose-daily-fractionated-radiation
#19
Megan Morisada, Paul E Clavijo, Ellen Moore, Lillian Sun, Michael Chamberlin, Carter Van Waes, James W Hodge, James B Mitchell, Jay Friedman, Clint T Allen
Preclinical evidence suggests that high-dose hypofractionated ionizing radiation (IR) can enhance anti-tumor immunity and result in significant tumor control when combined with immune checkpoint blockade (ICB). However, low-dose daily fractioned IR used for many tumor types including head and neck squamous cell carcinoma results in lymphopenia and may be immunosuppressive. We compared immune correlates, primary tumor and abscopal tumor control rates following the addition of PD-1 mAb to either high-dose hypofractioned (8Gyx2) or low-dose daily fractionated (2Gyx10) IR in syngeneic models of cancer...
2018: Oncoimmunology
https://www.readbyqxmd.com/read/29393175/fractionated-radiotherapy-of-intracranial-gliomas
#20
Amol J Ghia
Fractionated radiotherapy (FRT) plays a critical role in the management of gliomas. For glioblastoma, the irradiation dose of 60 Gy in 30 fractions with concomitant and adjuvant temozolomide is currently considered as a standard of treatment, and further dose escalation has failed to be of benefit in clinical trials. Hypofractionated radiation schedules may be applied in elderly patients or those with poor performance status. For anaplastic gliomas, the high-risk region is typically irradiated to a total dose of approximately 60 Gy in 1...
2018: Progress in Neurological Surgery
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