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Radiotherapy OR (radiation therapy)

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https://www.readbyqxmd.com/read/29037026/treatment-outcomes-of-extended-field-radiation-therapy-for-thoracic-superficial-esophageal-cancer
#1
Doo Yeul Lee, Sung Ho Moon, Kwan Ho Cho, Tae Hyun Kim, Moon Soo Kim, Jong Yeul Lee, Yang-Gun Suh
PURPOSE: To evaluate the efficacy and safety of extended-field radiation therapy for patients with thoracic superficial esophageal cancer (SEC). MATERIALS AND METHODS: From May 2007 to October 2016, a total of 24 patients with thoracic SEC (T1a and T1b) who underwent definitive radiotherapy and were analyzed retrospectively. The median total radiotherapy dose was 64 Gy (range, 54 to 66 Gy) in conventional fractionation. All 24 patients received radiotherapy to whole thoracic esophagus and 23 patients received elective nodal irradiation...
September 2017: Radiation Oncology Journal
https://www.readbyqxmd.com/read/29037025/gross-tumor-volume-dependency-on-phase-sorting-methods-of-four-dimensional-computed-tomography-images-for-lung-cancer
#2
Soo Yong Lee, Sangwook Lim, Sun Young Ma, Jesang Yu
PURPOSE: To see the gross tumor volume (GTV) dependency according to the phase selection and reconstruction methods, we measured and analyzed the changes of tumor volume and motion at each phase in 20 cases with lung cancer patients who underwent image-guided radiotherapy. MATERIALS AND METHODS: We retrospectively analyzed four-dimensional computed tomography (4D-CT) images in 20 cases of 19 patients who underwent image-guided radiotherapy. The 4D-CT images were reconstructed by the maximum intensity projection (MIP) and the minimum intensity projection (Min-IP) method after sorting phase as 40%-60%, 30%-70%, and 0%-90%...
September 2017: Radiation Oncology Journal
https://www.readbyqxmd.com/read/29037024/treatment-outcome-and-risk-analysis-for-cataract-after-radiotherapy-of-localized-ocular-adnexal-mucosa-associated-lymphoid-tissue-malt-lymphoma
#3
Hee Hyun Park, Sea-Won Lee, Soo Yoon Sung, Byung Ock Choi
PURPOSE: We retrospectively reviewed the results of radiotherapy for localized ocular adnexal MALT lymphoma (OAML) to investigate the risk factors of cataract. METHODS: Sixty-seven patients with stage IE OAML treated with radiotherapy at Seoul St. Mary's Hospital from 2001 to 2016 were included. Median treatment dose was 30 Gy. Lens protection was done in 52 (76%) patients. Radiation therapy (RT) extent was as follows: superficial (82.1%), tumor mass (4.5%), and entire orbital socket (13...
September 2017: Radiation Oncology Journal
https://www.readbyqxmd.com/read/29037023/simultaneous-integrated-boost-intensity-modulated-radiotherapy-versus-3-dimensional-conformal-radiotherapy-in-preoperative-concurrent-chemoradiotherapy-for-locally-advanced-rectal-cancer
#4
Bong Kyung Bae, Min Kyu Kang, Jae-Chul Kim, Mi Young Kim, Gyu-Seog Choi, Jong Gwang Kim, Byung Woog Kang, Hye Jin Kim, Soo Yeun Park
PURPOSE: To evaluate the feasibility of simultaneous integrated boost intensity-modulated radiotherapy (SIB-IMRT) for preoperative concurrent chemoradiotherapy (PCRT) in locally advanced rectal cancer (LARC), by comparing with 3-dimensional conformal radiotherapy (3D-CRT). MATERIALS AND METHODS: Patients who were treated with PCRT for LARC from 2015 January to 2016 December were retrospectively enrolled. Total doses of 45 Gy to 50.4 Gy with 3D-CRT or SIB-IMRT were administered concomitantly with 5-fluorouracil plus leucovorin or capecitabine...
September 2017: Radiation Oncology Journal
https://www.readbyqxmd.com/read/29037022/radiation-recall-dermatitis-triggered-by-sorafenib-after-radiation-therapy-for-hepatocellular-carcinoma
#5
Gwi Eon Kim, Hee-Sung Song, Ki Jung Ahn, Young Suk Kim
Sorafenib is widely used for unresectable and metastatic hepatocellular carcinomas. Radiation recall dermatitis (RRD) is an acute inflammatory reaction confined to previously irradiated skin that occurs after the administration of certain drugs. RRD after sorafenib treatment is rare; five cases have been reported thus far. We describe a 44-year-old man irradiated for chest wall bone metastasis from hepatocellular carcinoma. Eight days after radiotherapy completion, systemic therapy for metastatic hepatocellular carcinoma was initiated with sorafenib treatment...
September 2017: Radiation Oncology Journal
https://www.readbyqxmd.com/read/29037021/multimodal-therapy-for-locally-advanced-prostate-cancer-the-roles-of-radiotherapy-androgen-deprivation-therapy-and-their-combination
#6
REVIEW
Sung Uk Lee, Kwan Ho Cho
Locally advanced prostate cancer (LAPC) is defined as histologically proven T3-4 prostatic adenocarcinoma. In this review, we define the individual roles of radiotherapy (RT), short-term (ST-) and long-term (LT-) androgen deprivation therapy (ADT), and their combination in multimodal therapy for LAPC. Despite limitations in comparing the clinical outcomes among published papers, in the present study, a trend of 10-year clinical outcomes was roughly estimated by calculating the average rates weighted by the cohort number...
September 2017: Radiation Oncology Journal
https://www.readbyqxmd.com/read/29037018/role-of-fractionated-radiotherapy-in-patients-with-hemangioma-of-the-cavernous-sinus
#7
Sunmin Park, Sang Min Yoon, Sumin Lee, Jin-Hong Park, Si Yeol Song, Sang-Wook Lee, Seung Do Ahn, Jong Hoon Kim, Eun Kyung Choi
PURPOSE: We performed this retrospective study to investigate the outcomes of patients with hemangioma of the cavernous sinus after fractionated radiotherapy. MATERIALS AND METHODS: We analyzed 10 patients with hemangioma of the cavernous sinus who were treated with conventional radiotherapy between January 2000 and December 2016. The median patient age was 54 years (range, 31-65 years), and 8 patients (80.0%) were female. The mean hemangioma volume was 34.1 cm(3) (range, 6...
September 2017: Radiation Oncology Journal
https://www.readbyqxmd.com/read/29036696/radiation-protection-measurements-with-the-variance-covariance-method-in-the-stray-radiation-fields-from-photon-and-proton-therapy-facilities
#8
J Lillhök, L Persson, C E Andersen, A Dasu, O Ardenfors
The microdosimetric variance-covariance method was used to study the stray radiation fields from the photon therapy facility at the Technical University of Denmark and the scanned proton therapy beam at the Skandion Clinic in Uppsala, Sweden. Two TEPCs were used to determine the absorbed dose, the dose-average lineal energy, the dose-average quality factor and the dose equivalent. The neutron component measured by the detectors at the proton beam was studied through Monte Carlo simulations using the code MCNP6...
September 29, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29036692/clinical-utility-of-texture-analysis-of-18f-fdg-pet-ct-in-patients-with-stage-i-lung-cancer-treated-with-stereotactic-body-radiotherapy
#9
Kazuya Takeda, Kentaro Takanami, Yuko Shirata, Takaya Yamamoto, Noriyoshi Takahashi, Kengo Ito, Kei Takase, Keiichi Jingu
We evaluated the reproducibility and predictive value of texture parameters and existing parameters of 18F-FDG PET/CT images in Stage I non-small-cell lung cancer (NSCLC) patients treated with stereotactic body radiotherapy (SBRT). Twenty-six patients with Stage I NSCLC (T1-2N0M0) were retrospectively analyzed. All of the patients underwent an 18F-FDG PET/CT scan before treatment and were treated with SBRT. Each tumor was delineated using PET Edge (MIM Software Inc., Cleveland, OH), and texture parameters were calculated using open-source code CGITA...
September 21, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/29036688/a-cell-penetrating-antibody-inhibits-human-rad51-via-direct-binding
#10
Audrey Turchick, Denise C Hegan, Ryan B Jensen, Peter M Glazer
RAD51, a key factor in homology-directed repair (HDR), has long been considered an attractive target for cancer therapy, but few specific inhibitors have been found. A cell-penetrating, anti-DNA, lupus autoantibody, 3E10, was previously shown to inhibit HDR, sensitize tumors to radiation, and mediate synthetic lethal killing of BRCA2-deficient cancer cells, effects that were initially attributed to its affinity for DNA. However, as the molecular basis for its ability to inhibit DNA repair, we report that 3E10 directly binds to the N-terminus of RAD51, sequesters RAD51 in the cytoplasm, and impedes RAD51 binding to DNA...
September 28, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29036621/comparisons-of-the-clinical-outcomes-of-different-postoperative-radiation-strategies-for-treatment-of-head-and-neck-squamous-cell-carcinoma
#11
Chiyoko Makita, Takeshi Kodaira, Takashi Daimon, Hiroyuki Tachibana, Natsuo Tomita, Yutaro Koide, Yusuke Koide, Yujiro Fukuda, Daisuke Nishikawa, Hidenori Suzuki, Nobuhiro Hanai, Yasuhisa Hasegawa
Purpose: We previously reported unfavorable locoregional control with limited field postoperative radiotherapy for head and neck squamous cell carcinoma patients and thus revised the strategy to cover the whole neck. Head and neck squamous cell carcinoma Patients' outcomes were retrospectively analyzed to compare the efficacy of two treatments. Material and methods: Before 2010, the clinical target volume covered the tumor bed and/or involved the neck region. Since 2011, whole-neck irradiation was planned...
September 21, 2017: Japanese Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29036598/global-dna-methylation-analysis-reveals-mir-214-3p-contributes-to-cisplatin-resistance-in-pediatric-intracranial-nongerminomatous-malignant-germ-cell-tumors
#12
Tsung-Han Hsieh, Yun-Ru Liu, Ting-Yu Chang, Muh-Lii Liang, Hsin-Hung Chen, Hsei-Wei Wang, Yun Yen, Tai-Tong Wong
Background: Pediatric central nervous system germ cell tumors (CNSGCTs) are rare and heterogeneous neoplasms, and they can be divided into germinomas and nongerminomatous GCTs (NGGCTs). NGGCTs are further subdivided into mature teratomas and nongerminomatous malignant GCTs (NGMGCTs). Clinical outcomes suggest that NGMGCTs have poor prognosis and survival, and that they require more extensive radiotherapy and adjuvant chemotherapy. However, the mechanisms underlying this difference are still unclear...
October 3, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/29036595/persistent-in-vivo-cytogenetic-effects-of-radioiodine-therapy-a-21-year-follow-up-study-using-multicolor-fish
#13
Gordon K Livingston, Maria Escalona, Alvis Foster, Adayabalam S Balajee
Our previous studies demonstrated the cytogenetic effects in the peripheral blood lymphocytes of a 34-year-old male patient who received ablative radioactive 131iodine therapy (RIT) on two different occasions in 1992 and 1994. Assessment of RIT-induced chromosomal damage by the cytokinesis-blocked micronucleus assay (CBMN) showed the persistence of elevated micronucleus frequency in this patient for more than two decades since the first RIT. Subsequent cytogenetic analysis performed in 2012 revealed both stable and unstable aberrations, whose frequencies were higher than the baseline reported in the literature...
September 21, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/29036455/jlcs-medical-practice-guidelines-for-thymic-tumors-summary-of-recommendations
#14
Kohei Yokoi, Kazuya Kondo, Kiminori Fujimoto, Masaki Hara, Yoshihisa Kadota, Koji Kawaguchi, Hideo Kunitoh, Yoshihiro Matsuno, Jun Nakajima, Makoto Nishio, Kazuhiko Ogawa, Mitsugu Omasa
The Guideline Committee of the Japan Lung Cancer Society (JLCS) for Thymic Tumors published the Medical Practice Guideline for Thymic Tumors in Japanese as Chapter 3 of the Medical Practice Guidelines for Lung Cancers according to evidence-based medicine in December 2016. This medical practice guideline is the first for thymic epithelial tumors in Japan, and comprises a set of recommendations covering clinical diagnosis, treatment and pathological diagnosis. Thymic epithelial tumors include thymoma, thymic carcinoma and thymic neuroendocrine tumor...
September 21, 2017: Japanese Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29036364/nanodosimetry-towards-a-new-concept-of-radiation-quality
#15
V Conte, A Selva, P Colautti, G Hilgers, H Rabus, A Bantsar, M Pietrzak, S Pszona
The biological action of ionizing charged particles is initiated at the DNA level, and the effectiveness with which the initial physical effect changes into measurable biological damage is likely ruled by the stochastics of ionizations produced by the incident ions in subcellular nanometric volumes. Based on this hypothesis, experimental nanodosimetry aims at establishing a new concept of radiation quality that builds on measurable characteristics of the particle track structure at the nanometer scale. Three different nanodosimetric detection systems have been developed to date that allow measurements of the number of ionizations produced by the passage of a primary particle in a nanometer-size gas volume (in unit density scale)...
September 23, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29036263/effects-of-12c6-heavy-ion-beam-irradiation-on-the-p53-signaling-pathway-in-hepg2-liver-cancer-cells
#16
Kai Liu, Xinke Zhao, Jing Gu, Jianjun Wu, Hong Zhang, Yingdong Li
The heavy ion beam is considered to be the ideal source for radiotherapy. The p53 tumor suppressor gene senses DNA damage and transducts intracellular apoptosis signals. Previous reports showed that the heavy ion beam can trigger complex forms of damage to cellular DNA, leading to cell cycle arrest and apoptosis of HepG2 human liver cancer cells; however, the mechanisms remains unclear fully. In order to explore whether the intrinsic or extrinsic pathway participates this process, HepG2 cells were treated with 12C6+ HIB irradiation at doses of 0 (control), 1, 2, 4, and 6 Gy with various methods employed to understand relevant mechanisms, such as detection of apoptosis, cell cycle, and Fas expression by flow cytometry, analysis of apoptotic morphology by electron microscopy and laser scanning confocal microscopy, and screening differentially expressed genes relating to p53 signaling pathway by PCR-array assay following with any genes confirmed by western blot analysis...
September 23, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/29035997/stewart-treves-syndrome-on-the-lower-extremity-associated-to-idiopathic-chronic-lymphedema-visualized-on-fdg-pet-ct
#17
Jane Maestri Brittain, Tine Nymark, Malene Grubbe Hildebrandt, Dorrit Hovgaard, Kim Francis Andersen
Angiosarcomas are highly malignant and rare tumors of vascular or lymphatic endothelial cell origin with a poor prognosis. Lymphangiosarcoma associated with chronic lymphedema is known as Stewart-Treves syndrome. Stewart-Treves syndrome is primarily described in patients with lymphedema of an upper extremity occurring after breast cancer surgery including radical axillary lymph node dissection and subsequent radiotherapy. It is rarely described in the presence of idiopathic chronic lymphedema of the lower extremities...
October 13, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/29035995/internal-auditory-canal-tumor-as-an-incidental-finding-on-a-choline-pet-ct-scan-in-a-prostate-cancer-patient
#18
Julia Malamitsi, Roxanni Efthymiadou, Theodore Pipikos, Fani Vlachou, Vassilis Prassopoulos
An 84-year-old man with a history of prostate cancer, treated with radiotherapy, presented with an increase in PSA levels. F-choline PET/CT showed foci of increased choline uptake in L4 and L5 vertebrae, suggestive of bone metastases and another focus in the right cerebellopontine angle. A brain MRI revealed a focus of intense contrast enhancement in the same region, consistent with an acoustic neuroma.
October 13, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/29035992/18f-faza-pet-ct-hypoxia-imaging-of-high-grade-glioma-before-and-after-radiotherapy
#19
Paola Mapelli, Flavia Zerbetto, Elena Incerti, Gian Marco Conte, Valentino Bettinardi, Federico Fallanca, Nicoletta Anzalone, Nadia Di Muzio, Luigi Gianolli, Maria Picchio
A 57 year-old man underwent MRI with dynamic susceptibility contrast and dynamic contrast-enhanced perfusion for neurological symptoms suggesting the diagnosis of high-grade glioma. A F-FAZA PET/CT was performed because of the enrollment in a prospective clinical trial. Subsequent radiotherapy treatment has been planned based on conventional imaging; moreover, a F-FAZA PET/CT-guided treatment planning highlighting hypoxic regions has been simulated. After radiotherapy treatment, the man underwent MRI and F-FAZA PET/CT, showing partial response...
October 13, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/29035819/preparation-of-envelope-type-lipid-nanoparticles-containing-gold-nanorods-for-photothermal-cancer-therapy
#20
West Kristian D Paraiso, Hiroki Tanaka, Yusuke Sato, Daiki Shirane, Noriyuki Suzuki, Yasumitsu Ogra, Kota Tange, Yuta Nakai, Hiroki Yoshioka, Hideyoshi Harashima, Hidetaka Akita
The use of gold nanorods (AuNRs) that produce heat in response to near infrared (NIR) irradiation is an attractive approach to cancer photothermal therapy. AuNRs are usually prepared by using a highly toxic detergent: cetyltrimethylammonium bromide (CTAB). Thus, the removal of CTAB from the reaction mixture, and further stabilization of the surface of the AuNRs is required. In the present study, AuNRs were encapsulated in a multifunctional envelope-type nano device (AuNR-MEND) formed with an SS-cleavable and pH-activated lipid-like material...
October 9, 2017: Colloids and Surfaces. B, Biointerfaces
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