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https://www.readbyqxmd.com/read/28103903/intraoperative-radiotherapy-iort-as-boost-in-breast-cancer
#1
REVIEW
Felix Sedlmayer, Roland Reitsamer, Frederik Wenz, Elena Sperk, Christoph Fussl, Julia Kaiser, Ingrid Ziegler, Franz Zehentmayr, Heinz Deutschmann, Peter Kopp, Gerd Fastner
The term IORT (intraoperative radiotherapy) is currently used for various techniques that show huge differences in dose delivery and coverage of the tissue at risk. The largest evidence for boost IORT preceding whole breast irradiation (WBI) originates from intraoperative electron treatments (IOERT) with single doses around 10 Gy. At median follow-up periods at 6 years, outstandingly low local recurrence rates of less than 1% are observed. Higher local relapse rates were described for G3 tumors and triple negative breast cancers as well as for IORT following primary systemic treatment for locally advanced tumors...
January 19, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28094211/likelihood-of-unacceptable-normal-tissue-doses-in-breast-cancer-patients-undergoing-regional-nodal-irradiation-in-routine-clinical-practice
#2
Jose Bazan, Dominic DiCostanzo, Karla Kuhn, Lonika Majithia, Allison Quick, Nilendu Gupta, Julia White
PURPOSE: As indications for regional nodal irradiation (RNI) for breast cancer have expanded, so too has scrutiny over potential late toxicity from radiotherapy. This emphasizes the need for careful radiation treatment planning to maximize the therapeutic ratio. We sought to evaluate how often unacceptable doses (UDs) to organs at risk (OARs) occur and the associated factors for patients receiving RNI in daily practice. METHODS AND MATERIALS: Treatment records of patients who received RNI from February 2012 to May 2015 were studied...
October 19, 2016: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28094198/late-side-effects-and-cosmetic-results-of-accelerated-partial-breast-irradiation-with-interstitial-brachytherapy-versus-whole-breast-irradiation-after-breast-conserving-surgery-for-low-risk-invasive-and-in-situ-carcinoma-of-the-female-breast-5-year-results
#3
Csaba Polgár, Oliver J Ott, Guido Hildebrandt, Daniela Kauer-Dorner, Hellen Knauerhase, Tibor Major, Jaroslaw Lyczek, José Luis Guinot, Jürgen Dunst, Cristina Gutierrez Miguelez, Pavel Slampa, Michael Allgäuer, Kristina Lössl, Bülent Polat, György Kovács, Arnt-René Fischedick, Rainer Fietkau, Alexandra Resch, Anna Kulik, Leo Arribas, Peter Niehoff, Ferran Guedea, Annika Schlamann, Richard Pötter, Christine Gall, Wolfgang Uter, Vratislav Strnad
BACKGROUND: We previously confirmed the non-inferiority of accelerated partial breast irradiation (APBI) with interstitial brachytherapy in terms of local control and overall survival compared with whole-breast irradiation for patients with early-stage breast cancer who underwent breast-conserving surgery in a phase 3 randomised trial. Here, we present the 5-year late side-effects and cosmetic results of the trial. METHODS: We did this randomised, controlled, phase 3 trial at 16 centres in seven European countries...
January 13, 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28081006/latent-feature-representation-with-depth-directional-long-term-recurrent-learning-for-breast-masses-in-digital-breast-tomosynthesis
#4
Dae Hoe Kim, Seong Tae Kim, Jung Min Chang, Yong Man Ro
Characterization of masses in computer-aided detection systems for digital breast tomosynthesis (DBT) is an important step to reduce false positive (FP) rates. To effectively differentiate masses from FPs in DBT, discriminative mass feature representation is required. In this paper, we propose a new latent feature representation boosted by depth directional long-term recurrent learning for characterizing malignant masses. The proposed network is designed to encode mass characteristics in two parts. First, 2D spatial image characteristics of DBT slices are encoded as a slice feature representation by convolutional neural network (CNN)...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28062087/does-an-integrated-boost-increase-acute-toxicity-in-prone-hypofractionated-breast-irradiation-a-randomized-controlled-trial
#5
Leen Paelinck, Akos Gulyban, Ferenc Lakosi, Tom Vercauteren, Werner De Gersem, Bruno Speleers, Christel Monten, Thomas Mulliez, Patrick Berkovic, Annick van Greveling, Frederik Decoster, Philippe Coucke, Wilfried De Neve, Liv Veldeman
BACKGROUND AND PURPOSE: The safety of a simultaneous integrated boost (SIB) in combination with prone hypofractionated whole-breast irradiation (WBI) was investigated. MATERIALS AND METHODS: 167 patients were randomized between WBI with a sequential boost (SeB) or SIB. All patients were treated in prone position to 40.05Gy in 15 fractions to the whole breast. In the control arm, a SeB of 10Gy in 4 fractions (negative surgical margins) or 14.88Gy in 6 fractions (transsection) was prescribed...
January 3, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28060807/svm-and-svm-ensembles-in-breast-cancer-prediction
#6
Min-Wei Huang, Chih-Wen Chen, Wei-Chao Lin, Shih-Wen Ke, Chih-Fong Tsai
Breast cancer is an all too common disease in women, making how to effectively predict it an active research problem. A number of statistical and machine learning techniques have been employed to develop various breast cancer prediction models. Among them, support vector machines (SVM) have been shown to outperform many related techniques. To construct the SVM classifier, it is first necessary to decide the kernel function, and different kernel functions can result in different prediction performance. However, there have been very few studies focused on examining the prediction performances of SVM based on different kernel functions...
2017: PloS One
https://www.readbyqxmd.com/read/28053630/displacement-of-surgical-clips-during-postoperative-radiotherapy-in-breast-cancer-patients-who-received-breast-conserving-surgery
#7
SooYoon Sung, Joo Hwan Lee, Jong Hoon Lee, Sung Hwan Kim, Yoo-Kang Kwak, Sea-Won Lee, Ye Won Jeon, Young Jin Suh
PURPOSE: Surgical clips are used as a target for postoperative breast radiotherapy, and displacement of surgical clips would result in inaccurate delivery of radiation. We investigated the displacement range of surgical clips in the breast during postoperative radiotherapy following breast-conserving surgery. METHODS: A total of 178 patients who received breast-conserving surgery and postoperative radiation of 59.4 Gy in 33 fractions to the involved breast for 6...
December 2016: Journal of Breast Cancer
https://www.readbyqxmd.com/read/28048140/mo-fg-campus-jep2-05-mri-guided-single-fraction-boost-delivery-on-individual-axillary-lymph-nodes
#8
T C F van Heijst, N Hoekstra, M E P Philippens, D Eschbach, J J W Lagendijk, H J G D van den Bongard, B van Asselen
PURPOSE: The Utrecht MRI-linac (MRL) design enables new MR-guided radiotherapy (RT) approaches. This is a feasibility study for a single-fraction high dose (boost) to individual lymph nodes (LNs) in breast-cancer patients, after breast-conserving surgery (BCS) and hypofractionated whole-breast irradiation (WBI) with conventional axillary RT (AxRT). METHODS: After written informed consent, 5 breast-cancer patients (cT1-3N0) were enrolled (NL500460.041.14 trial) and underwent 1...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047592/su-g-tep1-07-investigation-of-rapidplan-based-plan-quality-for-breast-imrtsimultaneously-integrated-boost
#9
J Wang, W Hu, X Chen, Z Wu
PURPOSE: The aim of this study is to investigate the feasibility of using RapidPlan for breast cancer radiotherapy and to evaluate its performance for planners with different planning experiences. METHODS: A training database was collected with 80 expert plan datasets from patients previously received left breast conserving surgery and IMRT-simultaneously integrated boost radiotherapy. The models were created on the RapidPlan. Five patients from the training database and 5 external patients were used for internal and external validation, respectively...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047210/th-ab-bra-07-penelope-based-gpu-accelerated-dose-calculation-system-applied-to-mri-guided-radiation-therapy
#10
Y Wang, T Mazur, O Green, Y Hu, H Li, V Rodriguez, H Wooten, D Yang, T Zhao, S Mutic, H Li
PURPOSE: The clinical commissioning of IMRT subject to a magnetic field is challenging. The purpose of this work is to develop a GPU-accelerated Monte Carlo dose calculation platform based on PENELOPE and then use the platform to validate a vendor-provided MRIdian head model toward quality assurance of clinical IMRT treatment plans subject to a 0.35 T magnetic field. METHODS: We first translated PENELOPE from FORTRAN to C++ and validated that the translation produced equivalent results...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046443/su-f-t-498-a-comparative-evaluation-of-6mv-flatten-beam-and-flattening-filter-free-photon-beam-in-carcinoma-breast
#11
Suresh Tamilarasu, Madeswaran Saminathan
PURPOSE: Aim of the current study is to look plan quality, treatment beam ON time for IMRT using 6MV FB (Flatten Beam) and FFFB (Flattening Filter Free Beam) in left breast cancer cases. METHODS: Ten left breast cancer patients treated with breast conserving surgical (BCS) procedure approach and adjuvant radiotherapy were selected from the department database. Simultaneous Integrated boost (SIB) technique was used to irradiate the total left breast (PTV) to a dose of 50...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28038999/carbonic-anhydrase-inhibition-boosts-the-antitumor-effects-of-imatinib-mesylate-via-potentiating-the-antiangiogenic-and-antimetastatic-machineries
#12
Amal A Abd-El Fattah, Hebatallah A Darwish, Nevine Fathy, Samia A Shouman
Carbonic anhydrase inhibitors have emerged in the past few years as an interesting candidate for the development of novel unconventional strategies. Despite their effect in tumor regression via inhibition of tumor acidification, their potential role is not yet fully elucidated. Herein, we investigated whether acetazolamide (AZ) could modulate imatinib (IM) anticancer activity, both in breast cancer cells (T47D) and in isolated tumor specimens of Ehrlich ascites carcinoma (EAC). The impact of this combination on angiogenesis was evidenced by decreasing PDGF-A expression and enhancing that of TSP-1...
December 28, 2016: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28024382/gold-nanoclustered-hyaluronan-nano-assemblies-for-photothermally-maneuvered-photodynamic-tumor-ablation
#13
Hwa Seung Han, Ki Young Choi, Hansang Lee, Minchang Lee, Jae Yoon An, Sol Shin, Seunglee Kwon, Doo Sung Lee, Jae Hyung Park
Optically active nanomaterials have shown great promise as a nanomedicine platform for photothermal or photodynamic cancer therapies. Herein, we report a gold-nanoclustered hyaluronan nanoassembly (GNc-HyNA) for photothermally boosted photodynamic tumor ablation. Unlike other supramolecular gold constructs based on gold nanoparticle building blocks, this system utilizes the nanoassembly of amphiphilic hyaluronan conjugates as a drug carrier for a hydrophobic photodynamic therapy agent verteporfin, a polymeric reducing agent, and an organic nanoscaffold upon which gold can grow...
December 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/28007942/everolimus-boosts-endocrine-therapy-for-breast-cancer
#14
(no author information available yet)
In a phase II trial, the mTOR inhibitor everolimus, combined with the endocrine therapy fulvestrant, improved progression-free survival in postmenopausal women with hormone receptor-positive, HER2-negative metastatic breast cancer who had become resistant to aromatase inhibitors.
December 22, 2016: Cancer Discovery
https://www.readbyqxmd.com/read/27999745/microrna-155-deficiency-impairs-dendritic-cell-function-in-breast-cancer
#15
Junfeng Wang, Stephen Iwanowycz, Fang Yu, Xuemei Jia, Shuilong Leng, Yuzhen Wang, Wei Li, Shiang Huang, Walden Ai, Daping Fan
In antitumor immunity, dendritic cells (DCs) capture, process, and present tumor antigens to T cells, initiating a tumoricidal response. However, DCs are often dysfunctional due to their exposure to the tumor microenvironment (TME), leading to tumor escape from immune surveillance. Here, a vital role of microRNA-155 (miR-155) in regulating the function of DCs in breast cancer is reported. Host miR-155 deficiency enhanced breast cancer growth in mice, accompanied by reduced DCs in the tumors and draining lymph nodes...
2016: Oncoimmunology
https://www.readbyqxmd.com/read/27987274/breast-interest-group-faculty-of-radiation-oncology-australian-and-new-zealand-patterns-of-practice-survey-on-breast-radiotherapy
#16
Kimberley Nguyen, Penny Mackenzie, Angela Allen, Marcus Dreosti, Marita Morgia, Yvonne Zissiadis, Gilian Lamoury, Apsara Windsor
INTRODUCTION: This patterns of practice study was conducted on behalf of the RANZCR Breast Interest Group in order to document current radiotherapy practices for breast cancer in Australia and New Zealand. The survey identifies variations and highlights potential contentious aspects of radiotherapy management of breast cancer. METHODS: A fifty-eight question survey was disseminated via the Survey Monkey digital platform to 388 Radiation Oncologists in Australia and New Zealand...
December 16, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27986344/decreased-lung-perfusion-after-breast-chest-wall-irradiation-quantitative-results-from-a-prospective-clinical-trial
#17
Adam L Liss, Robin B Marsh, Nirav S Kapadia, Daniel L McShan, Virginia E Rogers, James M Balter, Jean M Moran, Kristy K Brock, Matt J Schipper, Reshma Jagsi, Kent A Griffith, Kevin R Flaherty, Kirk A Frey, Lori J Pierce
PURPOSE: To quantify lung perfusion changes after breast/chest wall radiation therapy (RT) using pre- and post-RT single photon emission computed tomography/computed tomography (SPECT/CT) attenuation-corrected perfusion scans; and correlate decreased perfusion with adjuvant RT dose for breast cancer in a prospective clinical trial. METHODS AND MATERIALS: As part of an institutional review board-approved trial studying the impact of RT technique on lung function in node-positive breast cancer, patients received breast/chest wall and regional nodal irradiation including superior internal mammary node RT to 50 to 52...
February 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/27974793/targeting-metastasis-initiating-cells-through-the-fatty-acid-receptor-cd36
#18
Gloria Pascual, Alexandra Avgustinova, Stefania Mejetta, Mercè Martín, Andrés Castellanos, Camille Stephan-Otto Attolini, Antoni Berenguer, Neus Prats, Agustí Toll, Juan Antonio Hueto, Coro Bescós, Luciano Di Croce, Salvador Aznar Benitah
The fact that the identity of the cells that initiate metastasis in most human cancers is unknown hampers the development of antimetastatic therapies. Here we describe a subpopulation of CD44(bright) cells in human oral carcinomas that do not overexpress mesenchymal genes, are slow-cycling, express high levels of the fatty acid receptor CD36 and lipid metabolism genes, and are unique in their ability to initiate metastasis. Palmitic acid or a high-fat diet specifically boosts the metastatic potential of CD36(+) metastasis-initiating cells in a CD36-dependent manner...
December 7, 2016: Nature
https://www.readbyqxmd.com/read/27966192/how-does-a-shared-decision-making-sdm-intervention-for-oncologists-affect-participation-style-and-preference-matching-in-patients-with-breast-and-colon-cancer
#19
Christiane Bieber, Jennifer Nicolai, Kathrin Gschwendtner, Nicole Müller, Katrin Reuter, Angela Buchholz, Birgit Kallinowski, Martin Härter, Wolfgang Eich
: The aims of this study are to assess patients' preferred and perceived decision-making roles and preference matching in a sample of German breast and colon cancer patients and to investigate how a shared decision-making (SDM) intervention for oncologists influences patients' preferred and perceived decision-making roles and the attainment of preference matches. This study is a post hoc analysis of a randomised controlled trial (RCT) on the effects of an SDM intervention. The SDM intervention was a 12-h SDM training program for physicians in combination with decision board use...
December 13, 2016: Journal of Cancer Education: the Official Journal of the American Association for Cancer Education
https://www.readbyqxmd.com/read/27929483/a-dosimetric-evaluation-of-knowledge-based-vmat-planning-with-simultaneous-integrated-boosting-for-rectal-cancer-patients
#20
Hao Wu, Fan Jiang, Haizhen Yue, Sha Li, Yibao Zhang
RapidPlan, a commercial knowledge-based optimizer, has been tested on head and neck, lung, esophageal, breast, liver, and prostate cancer patients. To appraise its performance on VMAT planning with simultaneous integrated boosting (SIB) for rectal cancer, this study configured a DVH (dose-volume histogram) estimation model consisting 80 best-effort manual cases of this type. Using the model-generated objectives, the MLC (multileaf collimator) sequences of other 70 clinically approved plans were reoptimized, while the remaining parameters, such as field geometry and photon energy, were maintained...
November 8, 2016: Journal of Applied Clinical Medical Physics
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