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https://www.readbyqxmd.com/read/29765265/is-volumetric-modulated-arc-therapy-with-constant-dose-rate-a-valid-option-in-radiation-therapy-for-head-and-neck-cancer-patients
#1
Annamaria Didona, Valentina Lancellotta, Claudio Zucchetti, Bianca Moira Panizza, Alessandro Frattegiani, Martina Iacco, Anna Concetta Di Pilato, Simonetta Saldi, Cynthia Aristei
Background: Intensity-modulated radiotherapy (IMRT) improves dose distribution in head and neck (HN) radiation therapy. Volumetric-modulated arc therapy (VMAT), a new form of IMRT, delivers radiation in single or multiple arcs, varying dose rates (VDR-VMAT) and gantry speeds, has gained considerable attention. Constant dose rate VMAT (CDR-VMAT) associated with a fixed gantry speed does not require a dedicated linear accelerator like VDR-VMAT. The present study explored the feasibility, efficiency and delivery accuracy of CDR-VMAT, by comparing it with IMRT and VDR-VMAT in treatment planning for HN cancer...
May 2018: Reports of Practical Oncology and Radiotherapy
https://www.readbyqxmd.com/read/29759308/the-value-of-adjuvant-radiotherapy-in-cutaneous-squamous-cell-carcinoma-a-review
#2
J Cañueto, A Jaka, A Toll
Cutaneous squamous cell carcinoma (cSCC) is the second most common cancer in humans and its incidence is rising. Although surgery is the treatment of choice for cSCC, postoperative adjuvant radiotherapy has an important role in local and locorregional disease control. In this review, we analyze the value of postoperative radiotherapy therapy in the management of high-risk cSCC (in particular, cases with perineural invasion), cSCC with positive surgical margins, and locally advanced cSCC (with parotid gland and/or lymph node metástasis)...
May 11, 2018: Actas Dermo-sifiliográficas
https://www.readbyqxmd.com/read/29732152/molecular-mechanisms-underlying-the-antimetastatic-activity-of-bufalin
#3
REVIEW
Jie Wang, Yue Xia, Qingshong Zuo, Teng Chen
Bufalin is a monomer compound extract from Chansu, which is a traditional Chinese medicine obtained from the skin and parotid venom glands of toads, such as Bufo bufo gargarizans Cantor and Bufo melanostictus Schneider. Chansu had been used in traditional Chinese medicine for >1,000 years due to its cardiac, anti-inflammatory and anticancer properties. Previous studies identified bufalin as the main anticancer compound of Chansu, and recent evidence has corroborated its anticancer properties. Bufalin inhibits cancer cell proliferation, induces cell cycle arrest, induces cancer cell apoptosis, inhibits neovascularization, induces cell differentiation, inhibits cancer metastasis and invasion, and enhances chemotherapeutic drug sensitivity...
May 2018: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/29706191/multi-criteria-optimization-achieves-superior-normal-tissue-sparing-in-intensity-modulated-radiation-therapy-for-oropharyngeal-cancer-patients
#4
Jianghong Xiao, Yan Li, Huashan Shi, Tangel Chang, Yong Luo, Xuetao Wang, Yang He, Nianyong Chen
OBJECTIVES: To evaluate the benefit of intensity-modulated radiation therapy (IMRT) with multi-criteria optimization (MCO) in patients with oropharyngeal cancer (OPC) and compare the dose difference between the MCO plans navigated by physicians and dosimetrists. MATERIALS AND METHODS: The conventional IMRT plans (nonMCO) and MCO IMRT plans navigated by physicians and dosimetrists (MCOp and MCOd) were created for 30patients with OPC. All the plans were reviewed, and the planning time and dose-volume parameters were compared...
May 2018: Oral Oncology
https://www.readbyqxmd.com/read/29698103/otitis-media-with-effusion-after-radiotherapy-of-the-head-and-neck-a-systematic-review
#5
J G Christensen, I Wessel, A B Gothelf, P Homøe
BACKGROUND: Otitis media (OM) and associated hearing problems may be side effects to radiotherapy of the head and neck region and affect patient quality of life. The condition is associated with the tumor location. OBJECTIVE: To perform a systematic review concerning the present knowledge of the risk of OM after radiotherapy of the head and neck. METHODS: A comprehensive search of PubMed and Embase was carried out between 1 October 2015 and 6 February 2017...
April 26, 2018: Acta Oncologica
https://www.readbyqxmd.com/read/29688836/pediatric-salivary-cancer-epidemiology-treatment-trends-and-association-of-treatment-modality-with-survival
#6
Elliot Morse, Rance J T Fujiwara, Zain Husain, Benjamin Judson, Saral Mehra
Objective To characterize the epidemiology of pediatric salivary cancer and associate patient, tumor, and treatment factors with treatment modality and survival. Study Design Cross-sectional analysis. Setting US national database. Subjects and Methods We identified 588 patients 19 years or younger diagnosed with salivary cancer in the National Cancer Database 2004-2013. We characterized patient, tumor, and treatment factors as proportions and associated these factors with treatment modality and overall survival via multivariable logistic regression and multivariable Cox proportional hazards regression, respectively...
April 1, 2018: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29679075/apkc%C3%AE-dependent-repression-of-yap-is-necessary-for-functional-restoration-of-irradiated-salivary-glands-with-igf-1
#7
Alejandro M Chibly, Wen Yu Wong, Maricela Pier, Hongqiang Cheng, Yongxin Mu, Ju Chen, Sourav Ghosh, Kirsten H Limesand
Xerostomia and salivary hypofunction often result as a consequence of radiation therapy for head and neck cancers, which are diagnosed in roughly 60,000 individuals every year in the U.S. Due to the lack of effective treatments for radiation-induced salivary hypofunction, stem cell-based therapies have been suggested to regenerate the irradiated salivary glands. Pharmacologically, restoration of salivary gland function has been accomplished in mice by administering IGF-1 shortly after radiation treatment, but it is not known if salivary stem and progenitor cells play a role...
April 20, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29658113/has-the-management-of-pediatric-mucoepidermoid-carcinoma-of-the-parotid-gland-changed
#8
Tyler A Janz, P Ryan Camilon, Shaun A Nguyen, Jessica R Levi, Eric J Lentsch
OBJECTIVES/HYPOTHESIS: To examine the evolving changes in management of pediatric mucoepidermoid carcinoma of the parotid gland. STUDY DESIGN: Retrospective analysis of a large population database. METHODS: Pediatric patients in the Surveillance, Epidemiology, and End Results database were included from 1973 to 2014 based on a diagnosis of mucoepidermoid carcinoma of the parotid gland using the International Classification of Diseases for Oncology, Third Edition codes: C07...
April 15, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29628628/a-treatment-planning-method-for-better-management-of-radiation-induced-oral-mucositis-in-locally-advanced-head-and-neck-cancer
#9
Hao Howard Zhang, Warren D D'Souza
Purpose/Aim: To describe a two-phase intensity-modulated radiation therapy (IMRT) treatment planning approach, that is, promising for reduction of oral mucositis risk in locally advanced head-and-neck cancer. Materials and Methods: Ten locally advanced head-and-neck cancer patients who underwent RT were retrospectively collected. Conventional IMRT and volumetric-modulated arc therapy (VMAT) plans were generated for these patients following clinical protocol. Following the first phase of generating conventional IMRT plans, our approach utilized data from Monte Carlo-based kernel superposition dose calculations corresponding to beam apertures (generated from the conventional IMRT plans) and used an exact mathematical programming-based optimization approach applying linear programming (LP) to dose optimization in the second phase...
January 2018: Journal of Medical Physics
https://www.readbyqxmd.com/read/29590144/administration-of-growth-factors-promotes-salisphere-formation-from-irradiated-parotid-salivary-glands
#10
Vicky T Nguyen, Peter Dawson, Qionghui Zhang, Zoey Harris, Kirsten H Limesand
Worldwide, 500,000 cases of head and neck cancer (HNC) are reported each year and the primary treatment for HNC is radiotherapy. Although the goal of radiotherapy is to target the tumor, secondary exposure occurs in surrounding normal tissues, such as the salivary glands. As a result, despite successful treatment of the cancer, patients are left with long-term side effects due to direct damage to the salivary glands. The effect is chronic and currently there is no treatment. Stem cells are an attractive therapeutic option for treatment of radiation-induced glandular dysfunction because of the potential to regenerate damaged cell populations and restore salivary gland function...
2018: PloS One
https://www.readbyqxmd.com/read/29569790/hypoxia-activated-adipose-mesenchymal-stem-cells-prevents-irradiation-induced-salivary-hypofunction-by-enhanced-paracrine-effect-through-fgf10
#11
Hyun-Soo Shin, Songyi Lee, Young-Mo Kim, Jae-Yol Lim
PURPOSE: To explore the effects and mechanisms of paracrine factors secreted from human adipose mesenchymal stem cells (hAdMSCs) that are activated by hypoxia on radioprotection against irradiation-induced salivary hypofunction in subjects undergoing radiotherapy for head and neck cancers. MATERIALS AND METHODS: An organotypic spheroid coculture model to mimic IR-induced salivary hypofunction was set up for in vitro experiments. Human parotid gland epithelial cells were organized to form three-dimensional acinus-like spheroids on growth factor reduced (GFR)-Matrigel...
March 23, 2018: Stem Cells
https://www.readbyqxmd.com/read/29564569/a-clinicopathological-study-of-parotid-carcinoma-18-year-review-of-171-patients-at-a-single-institution
#12
Akira Nishikado, Ryo Kawata, Shin-Ichi Haginomori, Tetsuya Terada, Masaaki Higashino, Yoshitaka Kurisu, Yoshinobu Hirose
BACKGROUND: This study investigated the clinical outcomes of patients with parotid carcinoma at a single institution during an 18-year period, with the focus on diagnosis, treatment, and survival. METHODS: The subjects were 171 patients with parotid carcinoma treated at our department during the 18-year period from September 1999 to August 2017. There were 19 patients in stage I, 65 patients in stage II, 22 patients in stage III, and 65 patients in stage IV. The symptoms, preoperative diagnosis, node metastasis, survival rate, prognostic factors, and immunohistological findings were investigated...
March 21, 2018: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29559174/mucoepidermoid-carcinoma-of-the-parotid-gland-a-national-cancer-database-study
#13
Karthik Rajasekaran, Vanessa Stubbs, Jinbo Chen, Pratyusha Yalamanchi, Steven Cannady, Jason Brant, Jason Newman
OBJECTIVE: To describe the demographics, tumor characteristics, and prognostic features of mucoepidermoid carcinoma of the parotid gland. MATERIALS AND METHODS: A retrospective study of the National Cancer Database was reviewed for all mucoepidermoid carcinomas of the parotid gland between 2004 and 2012). Patient demographics and tumor characteristics were abstracted and analyzed. Univariate and multivariate Cox multivariate regression models were used to identify predictors of survival...
May 2018: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/29556480/design-and-selection-of-machine-learning-methods-using-radiomics-and-dosiomics-for-normal-tissue-complication-probability-modeling-of-xerostomia
#14
Hubert S Gabryś, Florian Buettner, Florian Sterzing, Henrik Hauswald, Mark Bangert
Purpose: The purpose of this study is to investigate whether machine learning with dosiomic, radiomic, and demographic features allows for xerostomia risk assessment more precise than normal tissue complication probability (NTCP) models based on the mean radiation dose to parotid glands. Material and methods: A cohort of 153 head-and-neck cancer patients was used to model xerostomia at 0-6 months (early), 6-15 months (late), 15-24 months (long-term), and at any time (a longitudinal model) after radiotherapy...
2018: Frontiers in Oncology
https://www.readbyqxmd.com/read/29552777/metastasis-to-parotid-gland-from-non-head-and-neck-tumors
#15
Enzo Emanuelli, Andrea Ciorba, Daniele Borsetto, Diego Cazzador, Samantha Sarcognato, Filippo Marino, Stefano Fusetti, Chiara Bianchini, Francesco Stomeo, Stefano Pelucchi
PURPOSE: Most primary tumors spreading metastasis to the parotid gland are usually located in the head and neck region, nonetheless, rarely, parotid gland can also be the target of metastatic localization site of distant primary tumors. The purpose of this study was to describe a clinical series of metastasis to the parotid gland from distant primary tumors (non Head & Neck). METHODS: The clinical databases of parotid tumors in two academic centers have been analyzed and 11 cases of parotid metastatic cancers from distant primary tumors were found...
January 2018: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/29533706/management-of-parotid-metastatic-cutaneous-squamous-cell-carcinoma-regional-recurrence-rates-and-survival
#16
Nir Hirshoren, Olivia Ruskin, Lachlan J McDowell, Matthew Magarey, Stephen Kleid, Benjamin J Dixon
Objectives Extent of parotidectomy and neck dissection for metastatic cutaneous squamous cell carcinoma (cSCC) to the parotid is debated. We describe our experience, analyzing outcomes (overall survival and regional recurrence) associated with surgical extent and adjuvant treatment. Study Design A retrospective cohort study of parotidectomy with or without neck dissection for metastatic cSCC. Setting A tertiary referral cancer center in Australia. Subjects and Methods The study group consisted of patients with metastatic cSCC involving the parotid gland who underwent a curative-intent parotidectomy (superficial or total), with or without neck dissection, between 2003 and 2014...
March 1, 2018: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29523427/physiologic-distribution-of-psma-ligand-in-salivary-glands-and-seromucous-glands-of-the-head-and-neck-on-pet-ct
#17
Thomas J W Klein Nulent, Matthijs H Valstar, Bart de Keizer, Stefan M Willems, Laura A Smit, Abrahim Al-Mamgani, Ludwig E Smeele, Robert J J van Es, Remco de Bree, Wouter V Vogel
OBJECTIVES: Prostate-specific membrane antigen (PSMA) positron emission tomography/computed tomography (PET/CT) is used for detection and (re)staging of prostate cancer. However, healthy salivary, seromucous, and lacrimal glands also have high PSMA-ligand uptake. This study aimed to describe physiologic PSMA-ligand uptake distribution characteristics in the head and neck to aid in PSMA PET/CT interpretation and to identify possible new clinical applications for PSMA-ligand imaging. STUDY DESIGN: Thirty consecutive patients who underwent PSMA PET/CT for prostate cancer were evaluated...
May 2018: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29460025/combined-model-based-and-patient-specific-dosimetry-for-18-f-dcfpyl-a-psma-targeted-pet-agent
#18
Donika Plyku, Esther Mena, Steven P Rowe, Martin A Lodge, Zsolt Szabo, Steve Y Cho, Martin G Pomper, George Sgouros, Robert F Hobbs
PURPOSE: Prostate-specific membrane antigen (PSMA), a type-II integral membrane protein highly expressed in prostate cancer, has been extensively used as a target for imaging and therapy. Among the available PET radiotracers, the low molecular weight agents that bind to PSMA are proving particularly effective. We present the dosimetry results for 18 F-DCFPyL in nine patients with metastatic prostate cancer. METHODS: Nine patients were imaged using sequential PET/CT scans at approximately 1, 12, 35 and 70 min, and a final PET/CT scan at approximately 120 min after intravenous administration of 321 ± 8 MBq (8...
June 2018: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29454083/incidence-of-acute-suppurative-sialadenitis-in-end-stage-cancer-patients-a-retrospective-observational-study
#19
Hiroaki Watanabe, Takuya Odagiri, Yasuyuki Asai
CONTEXT: Acute suppurative sialadenitis (hereafter referred to as sialadenitis) is accompanied by pain and fever and can diminish the quality of life in end-stage cancer patients; however, its incidence is not clear. OBJECTIVES: We conducted this study to elucidate the incidence of sialadenitis in end-stage cancer patients. METHODS: Retrospective review and observational study based on patients' medical records. SUBJECTS: About 726 consecutive cancer patients who died on the palliative care unit of our hospital between April 2012 and November 2016 were included...
February 14, 2018: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/29449729/parotid-metastasis-of-renal-cell-carcinoma-mimicking-primary-clear-cell-oncocytoma-report-of-a-case-and-brief-review-of-the-literature
#20
B J Rocca, A Gini, C Calandra, A Ginori, F Crivelli
Malignancies of the parotid gland are relatively uncommon, accounting for only 3-6% of all head and neck cancers. Most of them are primary neoplasms, metastases are uncommon. Renal cell carcinoma (RCC) represents 3% of adult malignancies, the clear cell type comprises up to 70% of all RCC. RCC has an unpredictable behavior and the unique potential to metastasize to nearly every organ in the body. Though not as frequent, metastatic RCC to the head and neck has been identified in the thyroid, salivary glands, skull base, sinuses, pharynx, tonsils, tongue, lip and skin...
December 2017: Pathologica
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