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https://www.readbyqxmd.com/read/29341541/radiotherapy-fiber-dosimeter-probes-based-on-silver-only-coated-hollow-glass-waveguides
#1
Arash Darafsheh, Jeffrey E Melzer, James A Harrington, Alireza Kassaee, Jarod C Finlay
Manifestation of Čerenkov radiation as a contaminating signal is a significant issue in radiation therapy dose measurement by fiber-coupled scintillator dosimeters. To enhance the scintillation signal transmission while minimizing Čerenkov radiation contamination, we designed a fiber probe using a silver-only coated hollow waveguide (HWG). The HWG with scintillator inserted in its tip, embedded in tissue-mimicking phantoms, was irradiated with clinical electron and photon beams generated by a medical linear accelerator...
January 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29341035/when-an-unexpected-diagnosis-occurs-a-vaginal-premenopausal-sarcoma
#2
Pedro Marcos-Figueiredo, Diana de Sousa da Costa Moreira, Manuel Gonçalves Morim, Júlia Leite Pereira, Lurdes Silva Salgado
Vaginal cancer is a rare entity. The evidence on its management resides mostly in clinical cases or small case series. Of the histological types, the most frequent is the squamous cell carcinoma, followed by adenocarcinoma. But what to do when identifying an even more infrequent sarcoma in a premenopausal woman? In this study, we describe the case of a 53-year-old woman presenting with metrorrhagia for two months, who was evaluated after an intense episode. A necrotic and ulcerative vaginal swelling was documented and then submitted to biopsy, which revealed a vaginal sarcoma...
January 2018: Revista Brasileira de Ginecologia e Obstetrícia
https://www.readbyqxmd.com/read/29340167/subcutaneous-glucagon-infusion-and-continuous-glucose-monitoring-enable-effective-management-of-hypoglycemia-in-a-patient-with-igf-2-producing-hemangiopericytoma
#3
Eric D Buras, Emily Weatherup, Jennifer Wyckoff
Background: Ectopic insulin-like growth factor (IGF)-2 production is a rare complication of an array of epithelial and mesenchymal tumors, and can clinically manifest as life-threatening hypoglycemia. Case presentation: A 49-year-old woman with 13-year history of metastatic hemangiopericytoma, previously treated with multiple rounds of chemotherapy and palliative radiation, presented to the emergency department after a hypoglycemic seizure. On arrival, glucose was 18 mg/dL (1...
2018: Clinical Diabetes and Endocrinology
https://www.readbyqxmd.com/read/29340015/apatinib-alone-or-combined-with-radiotherapy-in-metastatic-prostate-cancer-results-from-a-pilot-multicenter-study
#4
Feng Zhao, Wei Tian, Ming Zeng, Jianling Xia, Honglin Hu, Xinbao Hao, Liangfu Han, Hao Liu, Yangke He, Xueqiang Zhu, Liang Liang, Rui Ao, Min Wei, Lili Deng, Yuquan Wei
Background: To study safety and efficacy of apatinib in combination of radiotherapy in patients with symptomatic bony disease prostate cancer(SBPC), based on the potential synergistic antitumor activity between apatinib and Radiation Therapy (RT). Patients and methods: In phase I dose escalation part, 18 patients received apatinib dose at 250 mg every other day, 250 mg daily and 500 mg daily. In phase II part, the 250 mg daily cohorts were expanded to 20 patients in combination of RT (6 Gy/fraction, 5 fraction in total), one patient lost followed up and excluded the study, comparing with RT alone cohort with 10 patients, ratio of RT to RT + apatinib was 1 to 2...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29339439/idh1-2-mutations-sensitize-acute-myeloid-leukemia-to-parp-inhibition-and-this-is-reversed-by-idh1-2-mutant-inhibitors
#5
Remco J Molenaar, Tomas Radivoyevitch, Yasunobu Nagata, Mohammed Khurshed, Bartlomiej Przychodzen, Hideki Makishima, Mingjiang Xu, Fonnet E Bleeker, Johanna W Wilmink, Hetty Carraway, Sudipto Mukherjee, Mikkael A Sekeres, Cornelis J F Van Noorden, Jaroslaw P Maciejewski
PURPOSE: Somatic mutations in IDH1/2 occur in ~20% of patients with myeloid neoplasms, including acute myeloid leukemia (AML). IDH1/2MUT enzymes produce D-2-hydroxyglutarate (D2HG), which associates with increases in DNA damage and improved responses to chemo/radiotherapy and PARP inhibitors in solid tumor cells. Whether this also holds true for IDH1/2MUT AML is not known. EXPERIMENTAL DESIGN: Well-characterized primary IDH1MUT, IDH2MUT and IDH1/2WT AML cells were analyzed for DNA damage and responses to daunorubicin, ionizing radiation and PARP inhibitors...
January 16, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29339207/nicaraven-reduces-cancer-metastasis-to-irradiated-lungs-by-decreasing-ccl8-and-macrophage-recruitment
#6
Chen Yan, Lan Luo, Yoshishige Urata, Shinji Goto, Tao-Sheng Li
Radiotherapy for cancer patients damages normal tissues, thereby inducing an inflammatory response and promoting cancer metastasis. We investigated whether nicaraven, a compound with radioprotective and anti-inflammatory properties, could attenuate radiation-induced cancer metastasis to the lungs of mice. Nicaraven and amifostine, another commercial radioprotective agent, had limited effects on both the radiosensitivity of Lewis lung carcinoma cells in vitro and radiation-induced tumor growth inhibition in vivo...
January 12, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29338969/current-and-future-challenges-of-radiation-oncology-in-iran-a-report-from-the-iranian-society-of-clinical-oncology
#7
A Ameri, M Barzegartahamtan, M Ghavamnasiri, R Mohammadpour, H Dehghan, A Sebzari, K Novin, M Aloosh
AIMS: Growth of the cancer incidence rate in Iran has been very high in recent years. Therefore, the Iranian health care system should be prepared for the treatment of a huge number of patients in the foreseeable future. One of the most important treatment options for cancer is radiation. However, there is no comprehensive information on infrastructure for radiation oncology in this country. MATERIALS AND METHODS: In 2015, a questionnaire was designed by the Iranian Society of Clinical Oncology (ISCO) and all radiation oncology centres in the country were visited to determine four important components of radiation oncology services, including facilities, equipment, personnel and patients...
January 12, 2018: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/29338744/new-insights-in-the-relative-radiobiological-effectiveness-of-proton-irradiation
#8
REVIEW
K Ilicic, S E Combs, T E Schmid
BACKGROUND: Proton radiotherapy is a form of charged particle therapy that is preferentially applied for the treatment of tumors positioned near to critical structures due to their physical characteristics, showing an inverted depth-dose profile. The sparing of normal tissue has additional advantages in the treatment of pediatric patients, in whom the risk of secondary cancers and late morbidity is significantly higher. Up to date, a fixed relative biological effectiveness (RBE) of 1...
January 16, 2018: Radiation Oncology
https://www.readbyqxmd.com/read/29338734/comparing-the-benefits-of-chemoradiotherapy-and-chemotherapy-for-resectable-stage-iii-a-n2-non-small-cell-lung-cancer-a-meta-analysis
#9
REVIEW
Yuqiao Chen, Xiong Peng, Yuan Zhou, Kun Xia, Wei Zhuang
BACKGROUND: Induction chemotherapy has been shown to improve survival of patients with stage III A/N2 (T1-3, N2, M0) non-small cell lung cancer (NSCLC), followed by resection, but the benefits of neoadjuvant radiotherapy still remain controversial. METHODS: PubMed, Embase, and Cochrane library databases were searched for relevant randomized controlled trials (RCTs) comparing the outcomes of induction chemoradiotherapy over induction chemotherapy, in patients with resectable stage IIIA/N2 NSCLC...
January 16, 2018: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29338455/current-treatment-options-for-meningioma
#10
Caroline Apra, Matthieu Peyre, Michel Kalamarides
With an annual incidence of 5/100,000, meningioma is the most frequent primary tumor of the central nervous system. Risk factors are radiotherapy and hormone intake. Most meningiomas are grade I benign tumors, but up to 15% are atypical and 2% anaplastic according to the WHO 2016 histological criteria. Areas covered: This review details the current standard therapy based on international guidelines and recent literature, and describes new approaches developed to treat refractory cases. First-line treatments are observation and surgery, but adjuvant radiotherapy/radiosurgery is discussed for atypical and indicated for anaplastic meningiomas...
January 17, 2018: Expert Review of Neurotherapeutics
https://www.readbyqxmd.com/read/29337140/characteristics-and-prognostic-factors-for-patients-with-her2-overexpressing-breast-cancer-and-brain-metastases-in-the-era-of-her2-targeted-therapy-an-argument-for-earlier-detection
#11
Aki Morikawa, Rui Wang, Sujata Patil, Adi Diab, Jonathan Yang, Clifford A Hudis, Heather L McArthur, Kathryn Beal, Andrew D Seidman
BACKGROUND: Although brain metastases (BM) are associated with poor prognosis, patients with human epidermal growth factor receptor 2 (HER2) overexpressing (HER2+) breast cancer (BC) with BM who are treated with anti-HER2 therapy have a relatively longer survival after BM diagnosis compared with other subtypes and HER2+ patients previously untreated with anti-HER2 therapy. It is unclear if previously reported prognostic factors are applicable to patients with HER2+ BC in the era of HER2-targeted therapy...
December 21, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/29337048/pathologic-findings-of-symptomatic-carotid-artery-stenosis-several-decades-after-radiation-therapy-a-case-report
#12
Shuichi Tonomura, Keiji Shimada, Naoko Funatsu, Yoshiaki Kakehi, Hisao Shimizu, Nobuyuki Takahashi
Improved long-term survival of malignancy has drawn increased attention to late cerebrovascular toxicity after neck radiotherapy. Recently, neck radiotherapy has been found as a significant risk factor of carotid artery stenosis and ischemic stroke; however, long-term adverse effects of radiation in large arteries remain unknown. Here, we described an autopsied case with recurrent ischemic stroke associated with ipsilateral carotid artery stenosis several decades after neck radiation therapy. Pathologically, there were intima-media fibrosis, endothelial cell loss, and decreased expression of thrombomodulin in irradiated carotid artery stenosis...
January 11, 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29336837/effectiveness-of-definitive-radiotherapy-for-squamous-cell-carcinoma-of-the-vulva-with-gross-inguinal-lymphadenopathy
#13
Shane R Stecklein, Michael Frumovitz, Ann H Klopp, Jillian R Gunther, Patricia J Eifel
OBJECTIVE: To evaluate the effectiveness and long-term side effects of definitive groin radiotherapy for vulvar cancer with grossly involved inguinal lymph nodes. METHODS: The records of 407 women with vulvar squamous cell carcinoma treated with radiotherapy at one institution during 1992-2014 were reviewed to identify patients who had radiographic or histologic evidence of grossly involved inguinal lymph nodes. Patients with lymphadenectomy before radiotherapy and patients treated for recurrent disease were excluded...
January 11, 2018: Gynecologic Oncology
https://www.readbyqxmd.com/read/29336374/radiotherapy-for-gastrointestinal-stromal-tumors
#14
REVIEW
Emine Elif Ozkan
OBJECTIVE: Gastrointestinal stromal tumors (GISTs) are rare mesenchymal tumors of the gastrointestinal tract, which frequently cause intraabdominal metastases. The current standard of care is surgery for localized cases, and adjuvant imatinib is recommended for tumors with a high risk of recurrence. To date, radiotherapy has not been commonly accepted as a part of multimodality treatment approach other than palliation. However, recently published case reports and some small series suggest that radiotherapy is a valuable option for controlling locally progressive, drug-resistant disease...
January 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29335856/abscopal-effects-of-radiotherapy-and-combined-mrna-based-immunotherapy-in-a-syngeneic-ova-expressing-thymoma-mouse-model
#15
Lucas Basler, Aleksandra Kowalczyk, Regina Heidenreich, Mariola Fotin-Mleczek, Savas Tsitsekidis, Daniel Zips, Franziska Eckert, Stephan M Huber
BACKGROUND: Tumor metastasis and immune evasion present major challenges of cancer treatment. Radiotherapy can overcome immunosuppressive tumor microenvironments. Anecdotal reports suggest abscopal anti-tumor immune responses. This study assesses abscopal effects of radiotherapy in combination with mRNA-based cancer vaccination (RNActive®). METHODS: C57BL/6 mice were injected with ovalbumin-expressing thymoma cells into the right hind leg (primary tumor) and left flank (secondary tumor) with a delay of 4 days...
January 16, 2018: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/29334537/isolated-central-nervous-system-chloroma-as-a-presenting-sign-of-relapsed-pediatric-acute-lymphoblastic-leukemia
#16
Jessica L Heath, Waitman K Aumann, Charles M Maxfield, Daniel S Wechsler
Central nervous system (CNS) chloromas are an exceedingly rare presentation of CNS relapse in acute lymphoblastic leukemia (ALL). We report a relapsed ALL patient who presented with 2 separate chloromas and cerebrospinal fluid lymphoblastocytosis, and outline a treatment plan of systemic chemotherapy and CNS-directed radiation therapy. A review of the literature indicates that multiagent chemotherapy combined with CNS radiotherapy is effective, with hematopoietic stem cell transplantation used in half of reported cases...
January 12, 2018: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/29333904/the-biological-treatment-planning-evolution-of-clinical-fractionated-radiotherapy-using-high-let
#17
Katia Parodi
PURPOSE: Starting from the birth of high LET radiotherapy in USA in the mid 1970s, the field has continuously evolved and to date over 20,000 patients have been treated with 12C ions worldwide. The purpose of this contribution is to review the advancements in clinical fractionated radiotherapy using high LET radiation in the last decades, with special focus on biological treatment planning. CONCLUSIONS: Along with technological developments for ion acceleration and beam delivery, progress in radiation biology and computational modeling has enabled a remarkable evolution in the planning capabilities of highly conformal, biologically optimized treatment with high LET radiation...
January 15, 2018: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/29333124/long-term-results-of-radiotherapy-in-vulvar-cancer-patients-in-slovenia-between-1997-2004
#18
Helena Barbara Zobec Logar
Background: The aim of this retrospective single institution study was to analyse long term results of vulvar cancer treatment with conventional 2D radiotherapy in Slovenia between years 1997-2004. Patients and methods: Fifty-six patients, median age 74.4 years +/- 9.7 years, mainly stage T2 or T3, were included in the study. All patients were treated with radiotherapy, which was combined with surgery (group A), used as the primary treatment (group B) or at the time of relapse (group C)...
December 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/29333114/carcinogenesis-induced-by-low-dose-radiation
#19
Igor Piotrowski, Katarzyna Kulcenty, Wiktoria Maria Suchorska, Agnieszka Skrobała, Małgorzata Skórska, Marta Kruszyna-Mochalska, Anna Kowalik, Weronika Jackowiak, Julian Malicki
Background: Although the effects of high dose radiation on human cells and tissues are relatively well defined, there is no consensus regarding the effects of low and very low radiation doses on the organism. Ionizing radiation has been shown to induce gene mutations and chromosome aberrations which are known to be involved in the process of carcinogenesis. The induction of secondary cancers is a challenging long-term side effect in oncologic patients treated with radiation. Medical sources of radiation like intensity modulated radiotherapy used in cancer treatment and computed tomography used in diagnostics, deliver very low doses of radiation to large volumes of healthy tissue, which might contribute to increased cancer rates in long surviving patients and in the general population...
December 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/29333005/prognostic-factors-and-survival-outcomes-of-intracranial-ependymoma-treated-with-multimodality-approach
#20
Kunhi Parambath Haresh, Ajeet Kumar Gandhi, Supriya Mallick, Rony Benson, Subhash Gupta, Daya Nand Sharma, Pramod Kumar Julka, Goura Kisor Rath
Objectives: We aimed to analyze treatment outcomes of intracranial ependymoma (ICE) treated at our institute with multimodality approach. Materials and Methods: Demography, treatment details, and survival data of 40 patients (2005-2012) were collected in a predesigned pro forma. Kaplan Meier method was used to analyze disease-free survival (DFS) and the impact of prognostic factors was determined using univariate analysis (log-rank test). Multivariate analysis was performed using Cox-proportional hazard model...
October 2017: Indian Journal of Medical and Paediatric Oncology
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