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https://www.readbyqxmd.com/read/29333357/salvage-stereotactic-radiosurgery-for-multiple-brain-recurrences-how-much-is-enough
#1
Fred Hsu
Stereotactic radiosurgery (SRS) can be used as a salvage treatment in selected patients with recurrent brain metastases after previous brain radiation. We report the case of a patient with metastatic lung adenocarcinoma who experienced recurrence numerous times in the brain and was successfully treated each time with SRS. For this patient, brain imaging surveillance helped identify metastases early for salvage SRS. We have also included a discussion of published literature regarding the neurocognitive toxicity of repeated courses of SRS...
November 10, 2017: Curēus
https://www.readbyqxmd.com/read/29332538/role-of-infiltrating-monocytes-in-the-development-of-radiation-induced-pulmonary-fibrosis
#2
Angela M Groves, Carl J Johnston, Jacqueline P Williams, Jacob N Finkelstein
Lung exposure to radiation induces an injury response that includes the release of cytokines and chemotactic mediators; these signals recruit immune cells to execute inflammatory and wound-healing processes. However, radiation alters the pulmonary microenvironment, dysregulating the immune responses and preventing a return to homeostasis. Importantly, dysregulation is observed as a chronic inflammation, which can progress into pneumonitis and promote pulmonary fibrosis; inflammatory monocytes, which are bone marrow derived and express CCR2, have been shown to migrate into the lung after radiation exposure...
January 13, 2018: Radiation Research
https://www.readbyqxmd.com/read/29332537/azd9291-increases-sensitivity-to-radiation-in-pc-9-ir-cells-by-delaying-dna-damage-repair-after-irradiation-and-inducing-apoptosis
#3
Shenghai Wu, Lucheng Zhu, Linglan Tu, Sumei Chen, Haixiu Huang, Jingjing Zhang, Shenglin Ma, Shirong Zhang
AZD9291 is a novel, irreversible epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI), which is administered orally. It has been proven effective in non-small cell lung cancer (NSCLC) patients, with both EGFR-sensitizing and EGFR T790M mutations in preclinical models. However, the potential therapeutic effects of AZD9291 combined with other modalities, including ionizing radiation, are not well understood. The presence of AZD9291 significantly increases the cell-killing effects of radiation in PC-9-IR cells with a secondary EGFR mutation (T790M), which was developed from NSCLC PC-9 cells (human lung adenocarcinoma cell with EGFR 19 exon 15 bp deletion) after chronic exposure to increasing doses of gefitinib, and in H1975 cells (human lung adenocarcinoma cell with EGFR exon 20 T790M mutation de novo), but not in PC-9 cells or in H460 cells (human lung adenocarcinoma cell with wild-type EGFR)...
January 13, 2018: Radiation Research
https://www.readbyqxmd.com/read/29332497/dosimetric-analysis-of-microscopic-disease-in-sbrt-for-lung-cancers
#4
Ronghu Mao, Lingling Tian, You Zhang, Lei Ren, Renqi Gao, Fang-Fang Yin, Hong Ge
OBJECTIVE: The objective of this study is to theoretically and experimentally evaluate the dosimetry in the microscopic disease regions surrounding the tumor under stereotactic body radiation therapy of lung cancer. METHODS: For simplicity, the tumor was considered moving along 1 dimension with a periodic function. The probability distribution function of the tumor position was generated according to the motion pattern and was used to estimate the delivered dose in the microscopic disease region...
December 2017: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/29332448/helical-therapy-is-safe-for-lung-stereotactic-body-radiation-therapy-despite-limitations-in-achieving-sharp-dose-gradients
#5
Neha P Amin, Adrian Nalichowski, Shauna Campbell, Jal Hyder, Robyn Spink, Andre A Konski, Michael Dominello
PURPOSE: We observed that many of our helical therapy lung stereotactic body radiation therapy plans did not meet the Radiation Therapy Oncology Group (RTOG) recommended R50% (volume of 50% of the prescription dose/planning target volume), which characterizes the steepness of dose fall off. We hypothesized that despite not meeting R50%, helical therapy lung stereotactic body radiation therapy plans would confer similar local control and minimal side effects as previously reported using nonhelical treatment platforms...
December 2017: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/29332372/measurement-and-modeling-of-indoor-radon-concentrations-in-residential-buildings
#6
Ji Hyun Park, Sungim Whang, Hyun Young Lee, Cheol-Min Lee, Dae Ryong Kang
Objectives: Radon, the primary constituent of natural radiation, is the second leading environmental cause of lung cancer after smoking. To confirm a relationship between indoor radon exposure and lung cancer, estimating cumulative levels of exposure to indoor radon for an individual or population is necessary. This study sought to develop a model for estimate indoor radon concentrations in Korea. Especially, our model and method may have wider application to other residences, not to specific site, and can be used in situations where actual measurements for input variables are lacking...
January 8, 2018: Environmental Health and Toxicology
https://www.readbyqxmd.com/read/29332322/tumor-immunology-and-immune-checkpoint-inhibitors-in-non-small-cell-lung-cancer
#7
REVIEW
Chi Young Jung, Scott J Antonia
Lung cancer is one of the most commonly diagnosed cancers and the leading cause of cancer-related deaths worldwide. Although progress in the treatment of advanced non-small cell lung cancer (NSCLC) has been made over the past decade, the 5-year survival rate in patients with lung cancer remains only 10%-20%. Obviously, new therapeutic options are required for patients with advanced NSCLC and unmet medical needs. Cancer immunotherapy is an evolving treatment modality that uses a patient's own immune systems to fight cancer...
January 2018: Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/29331422/fept-cys-nanoparticles-induce-ros-dependent-cell-toxicity-and-enhance-chemo-radiation-sensitivity-of-nsclc-cells-in-vivo-and-in-vitro
#8
Yingming Sun, Hongtao Miao, Shijing Ma, Lei Zhang, Chengcheng You, Fang Tang, Cui Yang, Xiaoli Tian, Feng Wang, Yuan Luo, Xiangjie Lin, Hui Wang, Chunyang Li, Zhijun Li, Hongnv Yu, Xuefeng Liu, Yu Xiao, Yan Gong, Junhong Zhang, Hong Quan, Conghua Xie
FePt-Cys nanoparticles (FePt-Cys NPs) have been well used in many fields, despite their poor solubility and stability. We synthetized a cysteine surface modified FePt NPs, which exhibited good solubility, stability and biocompatibility. We explored the insight mechanisms of the antitumor effects of this new nanoparticle system in lung cancer cells. In the in vitro study, FePt-Cys NPs induced a reactive oxygen species (ROS) burst, which suppressed the antioxidant protein expression and induced cell apoptosis...
January 10, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29328462/serum-and-glucocorticoid-regulated-kinase-1-sgk1-is-a-predictor-of-poor-prognosis-in-non-small-cell-lung-cancer-and-its-dynamic-pattern-following-treatment-with-sgk1-inhibitor-and-%C3%AE-ray-irradiation-was-elucidated
#9
Zhiyuan Tang, Qin Shen, Hao Xie, Zhu Zhou, Guanglin Shi, Caixin Zhang, Anaz Mohammed, Yi Wu, Songshi Ni, Xiaoyu Zhou
The tumor suppressor gene p53 and its dynamic patterns have caused widespread attention in the field of cancer research. Serum and glucocorticoid-regulated kinase 1 (SGK1) with features of serine/threonine kinase activity, which also contributes to the structural and functional similarities with the AKT family of kinases, is a key enzyme in the regulation of immune responses in tumor cells, and SGK1 was noted to be expressed in close relation to p53 protein levels, and there exists a negative feedback pathway between intracellular SGK1 and p53...
January 3, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29326090/the-addition-of-chemotherapy-to-radiation-therapy-improves-survival-in-elderly-patients-with-stage-iii-non-small-cell-lung-cancer
#10
Eric D Miller, James L Fisher, Karl E Haglund, John C Grecula, Meng Xu-Welliver, Erin M Bertino, Kai He, Peter G Shields, David P Carbone, Terence M Williams, Gregory A Otterson, Jose G Bazan
INTRODUCTION: Elderly patients represent the majority of lung cancer diagnoses but are poorly represented in clinical trials. We evaluated the overall survival (OS) of elderly patients with stage III non-small cell lung cancer (NSCLC) treated with definitive radiation compared to those treated with definitive chemoradiation. METHODS: We conducted a comparative effectiveness study of radiation therapy vs. chemoradiation in elderly (≥70 years old) patients with stage III NSCLC not treated surgically diagnosed from 2003-2014 using the National Cancer Database...
December 18, 2017: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/29325801/editorial-the-role-of-medical-physics-in-lung-sbrt
#11
EDITORIAL
Pietro Mancosu, Andrew Nisbet, Núria Jornet
Stereotactic body radiation therapy (SBRT) has become a standard treatment for non-operable patients with early stage non-small cell lung cancer (NSCLC). In this context, medical physics community has largely helped in the starting and the growth of this technique. In fact, SBRT requires the convergence of many different features for delivering large doses in few fractions to small moving target in an heterogeneous medium. The special issue of last month, was focused on the different physics challenges in lung SBRT...
January 9, 2018: Physica Medica: PM
https://www.readbyqxmd.com/read/29324212/managing-patients-with-oligometastatic-non-small-cell-lung-cancer
#12
Sarah Jo Stephens, Michael J Moravan, Joseph K Salama
Metastatic lung cancer has long been considered incurable, with the goal of treatment being palliation. However, a clinically meaningful number of these patients with limited metastases (approximately 25%) are living long term after definitive treatment to all sites of active disease. These patients with so-called oligometastatic disease likely represent a distinct clinical group who may possess a more indolent biology compared with their more widely metastatic counterparts. Hellman and Weichselbaum proposed the existence of the oligometastatic state, on the basis of the spectrum theory of cancer spread...
January 2018: Journal of Oncology Practice
https://www.readbyqxmd.com/read/29322798/pd-l1-expression-can-be-regarded-as-prognostic-factor-for-survival-of-non-small-cell-lung-cancer-patients-after-chemoradiotherapy
#13
M Vrankar, M Zwitter, I Kern, K Stanic
Inoperable locally advanced non-small cell lung cancer (LA NSCLC) is treated with concurrent or sequential chemotherapy (ChT) and radiation therapy (RT). Survival rates with this treatment remains poor, reported 5-year survival is about 15%. New treatment strategies, including immunotherapy with programmed death ligand-1 (PD-L1) check point inhibitors are being investigated. The clinical significance of PD-L1 expression in tumor samples from patients with inoperable LA NSCLC who underwent concurrent chemoradiotherapy (CRT) in our institution between 2005 and 2010 was evaluated...
2018: Neoplasma
https://www.readbyqxmd.com/read/29321496/genistein-promotes-ionizing-radiation-induced-cell-death-by-reducing-cytoplasmic-bcl-xl-levels-in-non-small-cell-lung-cancer
#14
Zhimin Zhang, Feng Jin, Xiaojuan Lian, Mengxia Li, Ge Wang, Baohua Lan, Hao He, Guo-Dong Liu, Yan Wu, Guiyin Sun, Cheng-Xiong Xu, Zhen-Zhou Yang
Genistein (GEN) has been previously reported to enhance the radiosensitivity of cancer cells; however, the detailed mechanisms remain unclear. Here, we report that GEN treatment inhibits the cytoplasmic distribution of Bcl-xL and increases nuclear Bcl-xL in non-small cell lung cancer (NSCLC). Interestingly, our in vitro data show that ionizing radiation IR treatment significantly increases IR-induced DNA damage and apoptosis in a low cytoplasmic Bcl-xL NSCLC cell line compared to that of high cytoplasmic Bcl-xL cell lines...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29319036/the-use-of-adaptive-intensity-modulated-radiotherapy-in-the-treatment-of-small-cell-carcinoma-lung-refractory-to-chemotherapy-in-a-patient-with-preexisting-interstitial-lung-disease
#15
Sarthak Tandon, Munish Gairola, Manoj Pal, Archana Aggarwal, Kanika Sharma, Ahmad Masroor Karimi, Avik Mandal, Rajiv Goyal, Ullas Batra, Inderjit Kaur
This is a case report of a 60-year-old diabetic, hypertensive male with a good performance status and a history of bilateral interstitial lung disease with a left upper lobe lung mass diagnosed to be a Stage IIB mixed small-cell/squamous cell carcinoma which was refractory to carboplatin- and etoposide-based chemotherapy. The patient was then taken up for adaptive intensity-modulated radiotherapy with tighter margin under image guidance with a mid-treatment replanning done at 25#. Acute toxicities were assessed weekly and showed no Grade 3 or more reactions...
January 2018: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/29317591/an-unusual-presentation-of-advanced-intrahepatic-cholangiocarcinoma-when-biopsy-results-fail
#16
Joseph J Tasch, Nirva Dube
BACKGROUND Intrahepatic cholangiocarcinoma is a rare condition which typically occurs in males between 50 and 70 years of age, and presents with symptoms related to biliary obstruction including jaundice, pruritus, and dark urine. Other common symptoms at presentation include abdominal pain, weight loss, and fever. CASE REPORT We present a case of a 67-year-old female initially presenting with chest pain at rest, found to have a lung nodule on diagnostic imaging at the time of admission. On further imaging, a 9 cm liver lesion was incidentally discovered, initially suspicious for hepatocellular carcinoma on imaging, with initial biopsy staining CK7 positive, and CK20 negative...
January 10, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29316366/impact-of-radiation-therapy-on-scleroderma-and-cancer-outcomes-in-scleroderma-patients-with-breast-cancer
#17
Dhaval J Shah, Ram Hirpara, Corrie L Poelman, Adrianne Woods, Laura K Hummers, Fredrick M Wigley, Jean L Wright, Arti Parekh, Virginia D Steen, Robyn T Domsic, Ami A Shah
OBJECTIVES: We examined SSc patients with breast cancer to 1) identify the prevalence of radiation complications and 2) examine SSc outcomes in SSc patients who received radiation therapy (RT) as part of their cancer treatment. METHODS: Patients with SSc and breast cancer were identified from the Johns Hopkins and University of Pittsburgh Scleroderma Center databases. We examined whether erythema, blistering, ulceration, or thickening of the skin developed in the RT port...
January 5, 2018: Arthritis Care & Research
https://www.readbyqxmd.com/read/29316134/dosimetric-benefit-of-adaptive-radiotherapy-in-the-neoadjuvant-management-of-canine-and-feline-thymoma-an-exploratory-case-series
#18
C Rohrer Bley, V Meier, U Schneider
While surgery is the treatment of choice for thymomas, complete excision is not possible in a significant proportion of cases. For these patients, radiotherapy can be used as neoadjunctive, post-operative adjunctive or sole therapy. During radiotherapy, rapid biological clearance of tumour cells is often observed, requiring adaptation of the treatment plan. Adaptive radiation therapy (RT) is a dynamic process, whereby the treatment plan is altered throughout the treatment course due to changes in morphologic, functional or positioning changes...
January 8, 2018: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/29315497/health-care-disparities-among-octogenarians-and-nonagenarians-with-stage-iii-lung-cancer
#19
Richard J Cassidy, Xinyan Zhang, Jeffrey M Switchenko, Pretesh R Patel, Joseph W Shelton, Sibo Tian, Ronica H Nanda, Conor E Steuer, Rathi N Pillai, Taofeek K Owonikoko, Suresh S Ramalingam, Felix G Fernandez, Seth D Force, Theresa W Gillespie, Walter J Curran, Kristin A Higgins
BACKGROUND: To the authors' knowledge, the practice patterns for patients aged more than 80 years with stage III non-small cell lung cancer (NSCLC) is not well known. The purpose of the current study was to investigate factors predictive of and the impact on overall survival (OS) after concurrent chemoradiation (CRT) among patients aged ≥80 years with American Joint Committee on Cancer stage III NSCLC in the National Cancer Data Base (NCDB). METHODS: In the NCDB, patients aged ≥80 years who were diagnosed with stage III NSCLC from 2004 to 2013 with complete treatment records were identified...
January 8, 2018: Cancer
https://www.readbyqxmd.com/read/29314062/postneoadjuvant-adjuvant-chemotherapy-in-resected-n1-non-small-cell-lung-cancer-with-residual-nodal-disease
#20
James W Smithy, Joshua E Rosen, Sarah J Gao, Anthony W Kim
BACKGROUND AND OBJECTIVES: Nodal positivity following neoadjuvant chemotherapy in locally advanced non-small cell lung cancer (NSCLC) is considered a poor prognostic sign, but little data are available on the efficacy of adjuvant chemotherapy in these cases. This analysis sought to determine whether adjuvant chemotherapy was associated with increased survival in NSCLC patients with residual N1 disease at resection. METHODS: Patients from the National Cancer Database (NCDB) with cN1T1-2M0 NSCLC treated with neoadjuvant chemotherapy and definitive resection between 2006 and 2012 were identified...
December 2017: Journal of Surgical Oncology
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