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Prostate brachytherapy

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https://www.readbyqxmd.com/read/28515807/external-validation-of-the-procars-nomograms-and-comparison-of-existing-risk-stratification-tools-for-localized-prostate-cancer
#1
David Tiberi, George Rodrigues, Tom Pickles, Jim Morris, Juanita Crook, Andre-Guy Martin, Fabio Cury, Charles Catton, Himu Lukka, Andrew Warner, Daniel Taussky
INTRODUCTION: The purpose of this study was to perform a direct comparison of several existing risk-stratification tools for localized prostate cancer in terms of their ability to predict for biochemical failure-free survival (BFFS). Two large databases were used and an external validation of two recently developed nomograms on an independent cohort was also performed in this analysis. METHODS: Patients who were treated with external beam radiotherapy (EBRT) and/or brachytherapy for localized prostate cancer were selected from the multi-institutional Genitourinary Radiation Oncologists of Canada (GUROC) Prostate Cancer Risk Stratification (ProCaRS) database (n=7974) and the Centre Hospitalier de l'Université de Montréal (CHUM) validation database (n=2266)...
March 2017: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/28501429/permanent-prostate-brachytherapy-postimplant-mri-dosimetry-using-positive-contrast-mri-markers
#2
Geoffrey V Martin, Thomas J Pugh, Usama Mahmood, Rajat J Kudchadker, Jihong Wang, Teresa L Bruno, Tharakeswara Bathala, Pierre Blanchard, Steven J Frank
PURPOSE: Permanent prostate brachytherapy dosimetry using computed tomography-magnetic resonance imaging (CT-MRI) fusion combines the anatomic detail of MRI with seed localization on CT but requires multimodality imaging acquisition and fusion. The purpose of this study was to compare the utility of MRI only postimplant dosimetry to standard CT-MRI fusion-based dosimetry. METHODS AND MATERIALS: Twenty-three patients undergoing permanent prostate brachytherapy with use of positive contrast MRI markers were included in this study...
May 10, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28499661/second-malignancies-after-permanent-implant-prostate-cancer-brachytherapy-a-single-institution-study-of-675%C3%A2-patients-treated-between-1999-and-2003
#3
J-M Cosset, L Belin, G Wakil, T Flam, N Thiounn, N Pierrat, D Pontvert, A Savignoni, L Chauveinc
PURPOSE: To analyse the rate of secondary malignancies observed in a series of 675 prostate cancer patients who underwent a permanent implant brachytherapy between 1999 and 2003, and to compare the incidence with the expected rate in a matched general French population. MATERIAL AND METHODS: The cohort included low-risk patients and a selection of "favourable-intermediate" risk patients. All patients were homogeneously treated using an intraoperative dynamic planning prostate brachytherapy technique, with loose 125-iodine seeds and a prescription dose of 145Gy...
May 9, 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28499488/in%C3%A2-vivo-dosimetry-with-alanine-electron-spin-resonance-dosimetry-to-evaluate-the-urethra-dose-during-high-dose-rate-brachytherapy
#4
Daniela Wagner, Markus Hermann, Andrea Hille
PURPOSE: To determine the dose of the urethra during Ir-192 high-dose-rate brachytherapy in 15 patients, a new detector form developed for in vivo measurements was used as described by Anton et al. 2009. METHODS AND MATERIALS: The detector consists of alanine powder with paraffin as binder which was filled in a shrinkable tube for measurements. The alanine strand so produced was inserted in the foley catheter during high-dose-rate brachytherapy of the prostate...
May 9, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28499487/external-beam-radiation-therapy-with-or-without-low-dose-rate-brachytherapy-analysis-of-favorable-and-unfavorable-intermediate-risk-prostate-cancer-patients
#5
Ahmed E Abugharib, Robert T Dess, Payal D Soni, Vrinda Narayana, Cheryl Evans, Mohamed S Gaber, Felix Y Feng, Patrick W McLaughlin, Daniel E Spratt
PURPOSE: To compare the tumor control and toxicity in men with intermediate-risk prostate cancer treated with either external beam radiation therapy (EBRT) or EBRT plus low-dose-rate brachytherapy (combo-RT). METHODS AND MATERIALS: Between 1995 and 2012, 579 men with intermediate-risk prostate cancer were treated with either EBRT (n = 388) or combo-RT (n = 191). Outcomes assessed included biochemical recurrence-free survival (bRFS), distant metastasis-free survival (DMFS), and cumulative incidence of genitourinary (GU) and gastrointestinal toxicity...
May 9, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28495442/validation-of-plastic-scintillation-detectors-for-applications-in-low-dose-rate-brachytherapy
#6
François Therriault-Proulx, Luc Beaulieu, Sam Beddar
PURPOSE: To develop a plastic scintillation detector (PSD) capable of accurately measuring dose around a low-dose-rate (LDR) iodine-125 ((125)I) radioactive seed as a first step toward in vivo dosimetry for prostate LDR brachytherapy. METHODS: Using a GEANT4 based Monte Carlo code, photon energy distribution at any position around a realistic (125)I source model was obtained. This energy distribution was convolved with the expected energy response from a plastic scintillator and dosimetry accuracy was evaluated...
May 8, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28488030/-125-i%C3%A2-brachytherapy-in-younger-prostate-cancer-patients-outcomes-in-low-and-intermediate-risk-disease
#7
Isabelle Kindts, Karin Stellamans, Ignace Billiet, Hans Pottel, Antoon Lambrecht
PURPOSE: To evaluate local recurrence in younger men treated with low-dose-rate (LDR) (125)I brachytherapy (BT) for localized prostate cancer. PATIENTS AND METHODS: A total of 192 patients (≤65-years-old) were treated with LDR (125)I-BT ± hormone therapy. Local failure was defined as any prostate-specific antigen (PSA) rise leading to salvage treatment or biochemical failure according to the Phoenix definition. A bounce was defined as a rise in the nadir of ≥0...
May 9, 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/28479189/mri-based-salvage-brachytherapy-moving-toward-a-focal-paradigm
#8
Marisa A Kollmeier, Michael Zelefsky, Sean McBride
Brachytherapy is an ideal treatment approach for radiorecurrent prostate cancer given the highly conformal treatment. Increasingly, multiparametric magnetic resonance imaging is being utilized to enhance our ability to assess intraprostatic tumor characteristics. This article aims to review the current literature on whole gland salvage brachytherapy for radiorecurrent prostate cancer as well as the methodology and progress towards a focal approach to salvage brachytherapy. Particular emphasis is placed on the potential role of multiparametric MRI in achieving optimal outcomes with focal salvage brachytherapy...
May 4, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28463154/brachytherapy-combined-with-surgery-for-conservative-treatment-of-children-with-bladder-neck-and-or-prostate-rhabdomyosarcoma
#9
Cyrus Chargari, Christine Haie-Meder, Florent Guérin, Véronique Minard-Colin, Guénolée de Lambert, Renaud Mazeron, Alexandre Escande, Fanny Marsolat, Isabelle Dumas, Eric Deutsch, Dominique Valteau-Couanet, Georges Audry, Odile Oberlin, Hélène Martelli
PURPOSE: To report the results of a conservative strategy based on partial surgery combined with brachytherapy in a prospective cohort of children with bladder-prostate rhabdomyosarcoma (BP RMS). METHODS AND MATERIALS: We prospectively documented the outcome of children treated in our department between 1991 and 2015 for BP RMS and undergoing a multimodal approach combining conservative surgery (partial cystectomy and/or partial prostatectomy) and perioperative interstitial low-dose-rate or pulse-dose-rate brachytherapy...
June 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28463152/national-trends-and-predictors-of-androgen-deprivation-therapy-use-in-low-risk-prostate-cancer
#10
David D Yang, Vinayak Muralidhar, Brandon A Mahal, Shelby A Labe, Michelle D Nezolosky, Marie E Vastola, Martin T King, Neil E Martin, Peter F Orio, Toni K Choueiri, Quoc-Dien Trinh, Daniel E Spratt, Karen E Hoffman, Felix Y Feng, Paul L Nguyen
PURPOSE: Androgen deprivation therapy (ADT) is not recommended for low-risk prostate cancer because of its lack of benefit and potential for harm. We evaluated the incidence and predictors of ADT use in low-risk disease. METHODS AND MATERIALS: Using the National Cancer Database, we identified 197,957 patients with low-risk prostate cancer (Gleason score of 3 + 3 = 6, prostate-specific antigen level <10 ng/mL, and cT1-T2a) diagnosed from 2004 to 2012 with complete demographic and treatment information...
June 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28463151/patient-reported-outcomes-after-radiation-therapy-in-men-with-prostate-cancer-a%C3%A2-systematic-review-of-prognostic-tool-accuracy-and-validity
#11
Michael E O'Callaghan, Elspeth Raymond, Jared M Campbell, Andrew D Vincent, Kerri Beckmann, David Roder, Sue Evans, John McNeil, Jeremy Millar, John Zalcberg, Martin Borg, Kim Moretti
PURPOSE: To identify, through a systematic review, all validated tools used for the prediction of patient-reported outcome measures (PROMs) in patients being treated with radiation therapy for prostate cancer, and provide a comparative summary of accuracy and generalizability. METHODS AND MATERIALS: PubMed and EMBASE were searched from July 2007. Title/abstract screening, full text review, and critical appraisal were undertaken by 2 reviewers, whereas data extraction was performed by a single reviewer...
June 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28463150/external-beam-radiation-therapy-or-brachytherapy-with-or-without-short-course-neoadjuvant-androgen-deprivation-therapy-results-of-a-multicenter-prospective-study-of-quality-of-life
#12
Hiram A Gay, Martin G Sanda, Jingxia Liu, Ningying Wu, Daniel A Hamstra, John T Wei, Rodney L Dunn, Eric A Klein, Howard M Sandler, Christopher S Saigal, Mark S Litwin, Deborah A Kuban, Larry Hembroff, Meredith M Regan, Peter Chang, Jeff M Michalski
PURPOSE: The long-term effects of neoadjuvant androgen deprivation therapy (NADT) with radiation therapy on participant-reported health-related quality of life (HRQOL) have not been characterized in prospective multicenter studies. We evaluated HRQOL for 2 years among participants undergoing radiation therapy (RT) with or without NADT for newly diagnosed, early-stage prostate cancer. METHODS AND MATERIALS: We analyzed longitudinal cohort data from the Prostate Cancer Outcomes and Satisfaction with Treatment Quality Assessment Consortium to ascertain the HRQOL trajectory of men receiving NADT with external beam RT (EBRT) or brachytherapy...
June 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28460998/institutional-long-term-outcomes-at-the-first-canadian-center-performing-intraoperatively-planned-low-dose-rate-brachytherapy-alone-in-low-and-intermediate-risk-prostate-cancer
#13
Michael Peacock, Kevin Martell, Amandeep Taggar, Tyler Meyer, Wendy Smith, Michael Sia, Steve Angyalfi, Siraj Husain
PURPOSE: The aim of this study is to report the long-term outcomes and toxicities from a large cohort of patients with localized prostate cancer treated with low-dose-rate intraoperatively planned brachytherapy. METHODS AND MATERIALS: Prostate-specific antigen levels, urinary symptoms, and erectile function were recorded at baseline, and each followup visit was then entered into a prospective database. Urinary toxicity requiring procedural intervention was retrospectively verified using an integrated electronic medical system...
April 28, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28460997/the-declining-utilization-of-brachytherapy-for-the-treatment-of-prostate-cancer-can-magnetic-resonance-imaging-reverse-the-trend
#14
REVIEW
Usama Mahmood
The utilization of brachytherapy for the treatment of prostate cancer has fluctuated over the years. Whereas initial excitement led to rapid expansion of this modality, more recent data suggest that prostate brachytherapy is in decline. This article reviews previous and current trends in the utilization of prostate brachytherapy and postulates the potential impact of the integration of magnetic resonance imaging imaging on this modality.
April 28, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28455849/coupling-i-125-permanent-implant-prostate-brachytherapy-monte-carlo-dose-calculations-with-radiobiological-models
#15
Nelson Miksys, Mehan Haidari, Eric Vigneault, Andre-Guy Martin, Luc Beaulieu, Rowan M Thomson
PURPOSE: To investigate the coupling of radiobiological models with patient-specific Monte Carlo (MC) dose calculations for permanent implant prostate brachytherapy (PIPB). To compare radiobiological indices evaluated with different radiobiological models using MC and simulated AAPM TG-43 dose calculations. METHODS: Three-dimensional dose distributions previously computed using MC techniques with two types of patient models, TG43sim (AAPM TG-43 water-based conditions) and MCDmm (realistic tissues and interseed effects), for 613 PIPB patients are coupled with biological dose and tumour control probability (TCP) models...
April 28, 2017: Medical Physics
https://www.readbyqxmd.com/read/28455847/assessment-of-sexual-function-in-japanese-men-with-prostate-cancer-undergoing-permanent-brachytherapy-without-androgen-deprivation-therapy-analysis-from-the-japanese-prostate-cancer-outcome-study-of-permanent-iodine-125-seed-implantation-database
#16
Koji Okihara, Atsunori Yorozu, Shiro Saito, Nobumichi Tanaka, Hirofumi Koga, Satoshi Higashide, Takashi Kikuchi, Masahiro Nakano
OBJECTIVES: To evaluate male sexual function in Japanese prostate cancer patients undergoing permanent brachytherapy without endocrine treatment, using quality of life measures of the Expanded Prostate Cancer Index Composite. METHODS: A total of 482 patients were selected as analysis subjects from the nationwide database for the Japanese Prostate Cancer Outcome Study of Permanent Iodine-125 Seed Implantation. The patients were asked to complete the Expanded Prostate Cancer Index Composite questionnaires before and at 3, 12, 24, and 36 months after the permanent brachytherapy...
April 28, 2017: International Journal of Urology: Official Journal of the Japanese Urological Association
https://www.readbyqxmd.com/read/28445167/spatial-features-of-dose-surface-maps-from-deformably-registered-plans-correlate-with-late-gastrointestinal-complications
#17
Calyn R Moulton, Michael J House, Victoria Lye, Colin I Tang, Michele Krawiec, David J Joseph, James W Denham, Martin A Ebert
This study investigates the associations between spatial distribution of dose to the rectal surface and observed gastrointestinal toxicities after deformably registering each phase of a combined external beam radiotherapy (EBRT)/high-dose-rate brachytherapy (HDRBT) prostate cancer treatment. The study contains data for 118 patients where the HDRBT CT was deformably-registered to the EBRT CT. The EBRT and registered HDRBT TG43 dose distributions in a reference 2 Gy/fraction were 3D-summed. Rectum dose-surface maps (DSMs) were obtained by virtually unfolding the rectum surface slice-by-slice...
May 21, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28442277/prostate-brachytherapy-either-alone-or-in-combination-with-external-beam-radiation-is-associated-with-longer-overall-survival-in-men-with-favorable-pathologic-group-4-gleason-score-8-prostate-cancer
#18
Matthew W Jackson, Arya Amini, Bernard L Jones, Brian Kavanagh, Paul Maroni, Steven J Frank, Usama Mahmood, Rajat J Kudchadker, Thomas J Pugh
PURPOSE: Conventional prostate cancer risk stratification results in considerable heterogeneity within each prognostic group. Men with pathologic grade Group 4 (Gleason score 8) but otherwise low-risk features have been identified as a favorable subset of high-risk prostate cancer. Given recent randomized data supporting improved cancer outcome with brachytherapy in intermediate- and high-risk prostate cancer, we sought to evaluate brachytherapy utilization and overall survival (OS) for these patients...
April 23, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28439429/the-standards-of-an-ultrasound-examination-of-the-prostate-gland-part-2
#19
REVIEW
Janusz F Tyloch, Andrzej Paweł Wieczorek
The paper discusses the rules of the proper performing of the ultrasound examination of the prostate gland. It has been divided into two parts: the general part and the detailed part. The first part presents the necessary requirements related to the ultrasound equipment needed for performing transabdominal and transrectal examinations of the prostate gland. The second part presents the application of the ultrasound examination in benign prostatic hyperplasia, in cases of prostate inflammation and in prostate cancer...
March 2017: Journal of Ultrasonography
https://www.readbyqxmd.com/read/28436359/robotic-prostatectomy-versus-brachytherapy-for-the-treatment-of-low-risk-prostate-cancer
#20
Claudio Giberti, Fabrizio Gallo, Maurizio Schenone, Emilio Gastaldi, Pierluigi Cortese, Gaetano Ninotta, Davide Becco
INTRODUCTION: To compare oncological and functional results of robot-assisted radical prostatectomy (RARP) and brachytherapy (BT) with a single-center prospective randomized study. MATERIALS AND METHODS: From January 2012 to January 2014, 165 patients with low risk prostate cancer, prostate volume ≤ 50 g, normal urinary (IPSS ≤ 7 and mean flow rate ≥ 15 mL/sec) and erectile functions (IIEF-5 > 17) were enrolled and randomly assigned to the RARP or BT group...
April 2017: Canadian Journal of Urology
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