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https://www.readbyqxmd.com/read/28330019/facial-nerve-tractography-a-new-tool-to-detect-perineural-invasion-in-parotid-cancers
#1
René-Charles Rouchy, Arnaud Attyé, Irène Troprès, Maud Medici, Adrian Kastler, Christian Righini, Alexandre Krainik
PURPOSE: To determine whether magnetic resonance (MR) tractography of facial nerve (VIIn) is useful to detect perineural invasion in case of parotid cancers. MATERIALS AND METHODS: Thirty patients, aged 18 or over, were enrolled in this prospective study between December 2013 and March 2016 (IRB 5891), with a diagnosis of parotid tumors (15 malignant, 15 benign). They have undergone preoperative MR scans (3.0-T) before surgical management. The parameters of the diffusion-weighted (DW) sequence were b-value of 1000s/mm(2); 32 directions; voxel size: 2mm isotropic; scan time: 9' The post-processing generates whole-neck constrained spherical deconvolution (CSD)-based tractography data and super-resolution track-weighted imaging (TWI) technique...
March 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28325604/early-prediction-of-radiotherapy-induced-parotid-shrinkage-and-toxicity-based-on-ct-radiomics-and-fuzzy-classification
#2
Marco Pota, Elisa Scalco, Giuseppe Sanguineti, Alessia Farneti, Giovanni Mauro Cattaneo, Giovanna Rizzo, Massimo Esposito
MOTIVATION: Patients under radiotherapy for head-and-neck cancer often suffer of long-term xerostomia, and/or consistent shrinkage of parotid glands. In order to avoid these drawbacks, adaptive therapy can be planned for patients at risk, if the prediction is obtained timely, before or during the early phase of treatment. Artificial intelligence can address the problem, by learning from examples and building classification models. In particular, fuzzy logic has shown its suitability for medical applications, in order to manage uncertain data, and to build transparent rule-based classifiers...
March 18, 2017: Artificial Intelligence in Medicine
https://www.readbyqxmd.com/read/28321773/salivary-duct-carcinoma-an-update-on-morphologic-mimics-and-diagnostic-use-of-androgen-receptor-immunohistochemistry
#3
Aaron M Udager, Simion I Chiosea
More than 15 years ago, seminal studies by Dr. E. Leon Barnes and colleagues transformed our understanding of salivary duct carcinoma (SDC) and, in doing so, paved the way for contemporary diagnostic and therapeutic approaches to this aggressive salivary adenocarcinoma. In particular, attention to the apocrine phenotype of SDC and expression of androgen receptor (AR) by immunohistochemistry has improved the diagnostic accuracy and showed how SDC can be reliably distinguished from its morphologic mimics (i.e...
March 20, 2017: Head and Neck Pathology
https://www.readbyqxmd.com/read/28315910/effect-of-selenium-supplementation-for-protection-of-salivary-glands-from-iodine-131-radiation-damage-in-patients-with-differentiated-thyroid-cancer
#4
Haiyoung Son, Sang Mi Lee, Ra Gyoung Yoon, Hakmin Lee, Ilkyun Lee, Soon Kim, Woong Youn Chung, Jeong Won Lee
OBJECTIVE: In the current study, we examined whether selenium supplementation during iodine-131 ((131)I) treatment had a radio-protective effect on salivary glands. SUBJECTS AND METHODS: Sixteen patients with differentiated thyroid cancer were prospectively enrolled in the study. Patients after total thyroidectomy, before (131)I treatment, were divided into two groups; 8 patients in the selenium group and 8 patients in the control group. Patients in the selenium group received 300νg of selenium orally for 10 days, from 3 days before to 6 days after (131)I treatment...
March 20, 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/28297346/initial-evaluation-of-automated-treatment-planning-software
#5
Dawn Gintz, Kujtim Latifi, Jimmy Caudell, Benjamin Nelms, Geoffrey Zhang, Eduardo Moros, Vladimir Feygelman
Even with advanced inverse-planning techniques, radiation treatment plan optimization remains a very time-consuming task with great output variability, which prompted the development of more automated approaches. One commercially available technique mimics the actions of experienced human operators to progressively guide the traditional optimization process with automatically created regions of interest and associated dose-volume objectives. We report on the initial evaluation of this algorithm on 10 challenging cases of locoreginally advanced head and neck cancer...
May 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28297339/deformable-image-registration-and-interobserver-variation-in-contour-propagation-for-radiation-therapy-planning
#6
Adam C Riegel, Jeffrey G Antone, Honglai Zhang, Prachi Jain, Jagdeep Raince, Anthony Rea, Angelo M Bergamo, Ajay Kapur, Louis Potters
Deformable image registration (DIR) and interobserver variation inevitably introduce uncertainty into the treatment planning process. The purpose of the current work was to measure deformable image registration (DIR) errors and interobserver variability for regions of interest (ROIs) in the head and neck and pelvic regions. Measured uncertainties were combined to examine planning margin adequacy for contours propagated for adaptive therapy and to assess the trade-off of DIR and interobserver uncertainty in atlas-based automatic segmentation...
May 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28296324/the-feasibility-of-atlas-based-automatic-segmentation-of-mri-for-h-n-radiotherapy-planning
#7
Kieran Wardman, Robin J D Prestwich, Mark J Gooding, Richard J Speight
Atlas-based autosegmentation is an established tool for segmenting structures for CT-planned head and neck radiotherapy. MRI is being increasingly integrated into the planning process. The aim of this study is to assess the feasibility of MRI-based, atlas-based autosegmentation for organs at risk (OAR) and lymph node levels, and to compare the segmentation accuracy with CT-based autosegmentation. Fourteen patients with locally advanced head and neck cancer in a prospective imaging study underwent a T1-weighted MRI and a PET-CT (with dedicated contrast-enhanced CT) in an immobilization mask...
July 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28295401/staging-cutaneous-squamous-cell-carcinoma-metastases-to-the-parotid-gland
#8
Lukasz Czerwonka, Robert J De Santis, Gilad Horowitz, Michael Hong, Mario Orsini, Danny Enepekides, David P Goldstein, Joe Dort, Kevin Higgins
OBJECTIVE: The staging of cutaneous squamous cell cancers (cSCC) was revised by the American Joint Committee on Cancer in 2010 to incorporate known prognostic factors and expand the N (node) category. The purpose of this study was to validate this staging system using a North American cohort, and to compare it to the O'Brien P (Parotid) and N staging system. METHODS: An exhaustive collaborative database search was performed for all patients with cSCC metastasis to the parotid gland treated at three major Canadian tertiary referral centers from December 1999 to March 2015...
March 14, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28291932/online-dosimetric-evaluation-of-larynx-sbrt-a-pilot-study-to-assess-the-necessity-of-adaptive-replanning
#9
Weihua Mao, Timothy Rozario, Weiguo Lu, Xuejun Gu, Yulong Yan, Xun Jia, Baran Sumer, David L Schwartz
PURPOSE: We have initiated a multi-institutional phase I trial of 5-fraction stereotactic body radiotherapy (SBRT) for Stage III-IVa laryngeal cancer. We conducted this pilot dosimetric study to confirm potential utility of online adaptive replanning to preserve treatment quality. METHODS: We evaluated ten cases: five patients enrolled onto the current trial and five patients enrolled onto a separate phase I SBRT trial for early-stage glottic larynx cancer. Baseline SBRT treatment plans were generated per protocol...
January 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28280360/arenobufagin-activates-p53-to-trigger-esophageal-squamous-cell-carcinoma-cell-apoptosis-in-vitro-and-in-vivo
#10
Junhong Lv, Shaohuan Lin, Panli Peng, Changqing Cai, Jianming Deng, Mingzhi Wang, Xuejun Li, Rongsheng Lin, Yu Lin, Ailing Fang, Qiling Li
Esophageal squamous cell carcinoma (ESCC) is often diagnosed at late incurable stage and lacks effective treatment strategy. Bufadienolides are cardiotonic steroids isolated from the skin and parotid venom glands of the toad Bufo bufo gargarizans Cantor with novel anticancer activity. However, there is little information about the effects and action mechanisms of bufadienolides on ESCC cells. In this study, the in vitro and in vivo anti-ESCC activities of bufadienolides, including bufalin (Bu) and arenobufagin (ArBu), were examined and the underlying molecular mechanisms were elucidated...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28262474/multi-institutional-randomized-trial-testing-the-utility-of-an-interactive-three-dimensional-contouring-atlas-among-radiation-oncology-residents
#11
Erin F Gillespie, Neil Panjwani, Daniel W Golden, Jillian Gunther, Tobias R Chapman, Jeffrey V Brower, Robert Kosztyla, Grant Larson, Pushpa Neppala, Vitali Moiseenko, Julie Bykowski, Parag Sanghvi, James D Murphy
PURPOSE: The delivery of safe and effective radiation therapy relies on accurate target delineation, particularly in the era of highly conformal treatment techniques. Current contouring resources are fragmented and can be cumbersome to use. The present study reports on the efficacy and usability of a web-based contouring atlas compared with those of existing contouring resources in a randomized trial. METHODS AND MATERIALS: We enrolled radiation oncology residents into a 2-phase contouring study...
December 9, 2016: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28258315/impact-of-low-level-laser-therapy-on-hyposalivation-salivary-ph-and-quality-of-life-in-head-and-neck-cancer-patients-post-radiotherapy
#12
Luiz Felipe Palma, Fernanda Aurora Stabile Gonnelli, Marcelo Marcucci, Rodrigo Souza Dias, Adelmo José Giordani, Roberto Araújo Segreto, Helena Regina Comodo Segreto
Late effects of radiotherapy for head and neck cancer treatment have been increasingly investigated due to its impact on patients' quality of life. The purpose of this study was to evaluate the effect of low-level laser therapy on hyposalivation, low salivary pH, and quality of life in head and neck cancer patients post-radiotherapy. Twenty-nine patients with radiation-induced xerostomia received laser sessions twice a week, during 3 months (24 sessions). For this, a continuous wave Indium-Gallium-Aluminium-Phosphorus diode laser device was used punctually on the major salivary glands (808 nm, 0...
March 3, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28256385/the-role-of-parotid-gland-irradiation-in-the-development-of-severe-hyposalivation-xerostomia-after-intensity-modulated-radiation-therapy-for-head-and-neck-cancer-temporal-patterns-risk-factors-and-testing-the-quantec-guidelines
#13
Adepitan A Owosho, Maria Thor, Jung Hun Oh, Nadeem Riaz, C Jillian Tsai, Haley Rosenberg, Spyridon Varthis, Sae Hee K Yom, Joseph M Huryn, Nancy Y Lee, Joseph O Deasy, Cherry L Estilo
BACKGROUND: The aims of this study were to investigate temporal patterns and potential risk factors for severe hyposalivation (xerostomia) after intensity-modulated radiotherapy (IMRT) for head and neck cancer (HNC), and to test the two QUANTEC (Quantitative Analysis of Normal Tissue Effects in the Clinic) guidelines. PATIENTS AND METHODS: Sixty-three patients treated at the Memorial Sloan Kettering Cancer Center between 2006 and 2015, who had a minimum of three stimulated whole mouth saliva flow measurements (WMSFM) at a median follow-up time of 11 (range: 3-24) months were included...
January 31, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28249655/salivary-gland-pleomorphic-adenoma-in-the-netherlands-a-nationwide-observational-study-of-primary-tumor-incidence-malignant-transformation-recurrence-and-risk-factors-for-recurrence
#14
M H Valstar, M de Ridder, E C van den Broek, M M Stuiver, B A C van Dijk, M L F van Velthuysen, A J M Balm, L E Smeele
INTRODUCTION: Whereas salivary gland pleomorphic adenoma (SGPA) is the most common type of salivary gland tumor, little is known about its epidemiology because national cancer registries do not register this disease. OBJECTIVES: To establish SGPA incidence trends, rates of secondary malignant transformation and recurrence and associated factors in the Netherlands. MATERIALS AND METHODS: Data on incidence, epidemiology, secondary malignant transformation and recurrence were retrieved from the Dutch pathology registry (PALGA) for the years 1992, 1997, 2002, 2007, and 2012...
March 2017: Oral Oncology
https://www.readbyqxmd.com/read/28230591/comparison-of-complications-in-parotid-surgery-with-harmonic-scalpel-versus-cold-instruments
#15
Xiaoyong Yang, Yang Yu, Dapeng Li, Li Dong
Complications following parotid surgery with harmonic scalpel versus cold instruments were seldom discussed. The authors retrospectively analyzed the medical record of 94 patients who received parotid surgery at Tianjin National Clinical Research Center for Cancer between January 2012 and October 2015, and compared the complications in patients operated with either Harmonic FCS9 (HF) or traditional cold instruments (CI). The mean operative time was 65.1 minutes in HF group versus 88.9 minutes for CI group...
February 22, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28205307/segmentation-of-organs-at-risks-in-head-and-neck-ct-images-using-convolutional-neural-networks
#16
Bulat Ibragimov, Lei Xing
PURPOSE: Accurate segmentation of organs-at-risks (OARs) is the key step for efficient planning of radiation therapy for head and neck (HaN) cancer treatment. In the work, we proposed the first deep learning-based algorithm, for segmentation of OARs in HaN CT images, and compared its performance against state-of-the-art automated segmentation algorithms, commercial software, and interobserver variability. METHODS: Convolutional neural networks (CNNs)-a concept from the field of deep learning-were used to study consistent intensity patterns of OARs from training CT images and to segment the OAR in a previously unseen test CT image...
February 2017: Medical Physics
https://www.readbyqxmd.com/read/28194862/patterns-of-care-and-survival-of-adjuvant-radiation-for-major-salivary-adenoid-cystic-carcinoma
#17
Anna Lee, Babak Givi, Virginia W Osborn, David Schwartz, David Schreiber
OBJECTIVES/HYPOTHESIS: National Cancer Care Network guidelines suggest consideration of adjuvant radiation even for early stage adenoid cystic carcinoma of the salivary glands. We used the National Cancer Data Base (NCDB) to analyze practice patterns and outcomes of postoperative radiotherapy for adenoid cystic carcinomas. STUDY DESIGN: Retrospective NCDB review. METHODS: Patients with nonmetastatic adenoid cystic carcinoma of the parotid, submandibular, or another major salivary gland from 2004 to 2012 were identified...
February 14, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28170182/primary-salivary-human-stem-progenitor-cells-undergo-microenvironment-driven-acinar-like-differentiation-in-hyaluronate-hydrogel-culture
#18
Padma Pradeepa Srinivasan, Vaishali N Patel, Shuang Liu, Daniel A Harrington, Matthew P Hoffman, Xinqiao Jia, Robert L Witt, Mary C Farach-Carson, Swati Pradhan-Bhatt
Radiotherapy for head and neck cancer often has undesirable effects on salivary glands that lead to xerostomia or severe dry mouth, which can increase oral infections. Our goal is to engineer functional, three-dimensional (3D) salivary gland neotissue for autologous implantation to provide permanent relief. An immediate need exists to obtain autologous adult progenitor cells as the use of embryonic and induced pluripotent stem cells potentially pose serious risks such as teratogenicity and immunogenic rejection...
January 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28170130/cyclical-hypofractionated-radiotherapy-also-known-as-quad-shot-alone-using-intensity-modulated-radiotherapy-for-squamous-cell-carcinoma-of-the-parotid-gland-in-an-85-year-old-patient-with-multiple-comorbidities
#19
Whoon Jong Kil, Kevin Camphausen
BACKGROUND: Palliative radiotherapy (RT) is not commonly offered to patients with head and neck cancer because of the belief that toxicity from the RT would not provide great palliative benefits. The purpose of this study was for us to report the advantages of cyclical hypofractionated RT (QUAD Shot) using intensity-modulated RT (IMRT) for an elderly comorbid patient with head and neck cancer. METHODS: An 85-year-old multiple comorbid man with squamous cell carcinoma in the left parotid gland with left facial pain received the IMRT-QUAD Shot (14 Gy/4 fractions, twice-daily treatment with 6 hours interval, on 2 consecutive days) to lesions, which were repeated every 4 weeks 3 times...
February 7, 2017: Head & Neck
https://www.readbyqxmd.com/read/28168934/a-comparative-evaluation-of-3-different-free-form-deformable-image-registration-and-contour-propagation-methods-for-head-and-neck-mri
#20
Sara Broggi, Elisa Scalco, Maria Luisa Belli, Gerlinde Logghe, Dirk Verellen, Stefano Moriconi, Anna Chiara, Anna Palmisano, Renata Mellone, Claudio Fiorino, Giovanna Rizzo
PURPOSE: To validate and compare the deformable image registration and parotid contour propagation process for head and neck magnetic resonance imaging in patients treated with radiotherapy using 3 different approaches-the commercial MIM, the open-source Elastix software, and an optimized version of it. MATERIALS AND METHODS: Twelve patients with head and neck cancer previously treated with radiotherapy were considered. Deformable image registration and parotid contour propagation were evaluated by considering the magnetic resonance images acquired before and after the end of the treatment...
January 1, 2017: Technology in Cancer Research & Treatment
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