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mack roach

Li Zhang, Julian Johnson, Alexander R Gottschalk, Albert J Chang, I-Chow Hsu, Mack Roach, Zachary A Seymour
PURPOSE: The purpose of this study was to evaluate a receiver operating characteristic (ROC) curve method to determine dose thresholds with late genitourinary (GU) toxicity after stereotactic body radiation therapy for prostate cancer. METHODS AND MATERIALS: Seventy-eight patients diagnosed with low- to intermediate-risk prostate cancer and treated with stereotactic body radiation therapy alone were reviewed retrospectively. All patients received a total dose of 38 Gy in 4 fractions with a planning target volume expansion of 2 mm...
March 2017: Practical Radiation Oncology
Bryce B Reeve, David M Thissen, Carla M Bann, Nicole Mack, Katherine Treiman, Hanna K Sanoff, Nancy Roach, Brooke E Magnus, Jason He, Laura K Wagner, Rebecca Moultrie, Kathryn D Jackson, Courtney Mann, Lauren A McCormack
OBJECTIVE: To evaluate the psychometric properties of questions that assess patient perceptions of patient-provider communication and design measures of patient-centered communication (PCC). METHODS: Participants (adults with colon or rectal cancer living in North Carolina) completed a survey at 2 to 3 months post-diagnosis. The survey included 87 questions in six PCC Functions: Exchanging Information, Fostering Health Relationships, Making Decisions, Responding to Emotions, Enabling Patient Self-Management, and Managing Uncertainty...
February 10, 2017: Patient Education and Counseling
Maurice M Garcia, Alexander R Gottschalk, Jonathan Brajtbord, Badrinath R Konety, Maxwell V Meng, Mack Roach, Peter R Carroll
[This corrects the article DOI: 10.1371/journal.pone.0089754.].
2016: PloS One
Mack Roach
No abstract text is available yet for this article.
July 2016: Nature Reviews. Urology
Michael Wahl, Martina Descovich, Erin Shugard, Dilini Pinnaduwage, Atchar Sudhyadhom, Albert Chang, Mack Roach, Alexander Gottschalk, Josephine Chen
Stereotactic body radiotherapy for prostate cancer is rapidly growing in popularity. Stereotactic body radiotherapy plans mimic those of high-dose rate brachytherapy, with tight margins and inhomogeneous dose distributions. The impact of interfraction anatomical changes on the dose received by organs at risk under these conditions has not been well documented. To estimate anatomical variation during stereotactic body radiotherapy, 10 patients were identified who received a prostate boost using robotic stereotactic body radiotherapy after completing 25 fractions of pelvic radiotherapy with daily megavoltage computed tomography...
May 18, 2016: Technology in Cancer Research & Treatment
Mack Roach
No abstract text is available yet for this article.
August 2016: Journal of Urology
Mack Roach, Reinhard Schulte, Kavita Mishra, Bruce Faddegon, Igor Barani, Ann Lazar, Eleanor A Blakely
No abstract text is available yet for this article.
2016: International Journal of Particle Therapy
Dilini S Pinnaduwage, Martina Descovich, Michael W Lometti, Badri Varad, Mack Roach, Alexander R Gottschalk
This study compares conventional and robotic intensity modulated radiation therapy (IMRT) plans for prostate boost treatments and provides clinical insight into the strengths and weaknesses of each. The potential for dose escalation with robotic IMRT is further investigated using the "critical volume tolerance" method proposed by Roach et al. Three clinically acceptable treatment plans were generated for 10 prostate boost patients: (1) a robotic IMRT plan using fixed cones, (2) a robotic IMRT plan using the Iris variable aperture collimator, and (3) a conventional linac based IMRT (c-IMRT) plan...
March 31, 2016: Technology in Cancer Research & Treatment
Jason Chan, Mack Roach
No abstract text is available yet for this article.
March 2016: European Urology
Mekhail Anwar, Vivian Weinberg, Zachary Seymour, I Joe Hsu, Mack Roach, Alex R Gottschalk
BACKGROUND AND PURPOSE: Treatment of intermediate and high-risk prostate cancer with a high BED has been shown to increase recurrence free survival (RFS). While high dose rate (HDR) brachytherapy, given as a boost is effective in delivering a high BED, many patients are not candidates for the procedure or wish to avoid an invasive procedure. We evaluated the use of stereotactic body radiotherapy (SBRT) as a boost, with dosimetry modeled after HDR-boost. MATERIAL AND METHODS: Fifty patients were treated with two fractions of SBRT (9...
January 21, 2016: Radiation Oncology
Mack Roach, Tania L Ceron Lizarraga, Ann A Lazar
PURPOSE: The optimal treatment of clinically localized prostate cancer is controversial. Most studies focus on biochemical (PSA) failure when comparing radical prostatectomy (RP) with radiation therapy (RT), but this endpoint has not been validated as predictive of overall survival (OS) or cause-specific survival (CSS). We analyzed the available literature to determine whether reliable conclusions could be made concerning the effectiveness of RP compared with RT with or without androgen deprivation therapy (ADT), assuming current treatment standards...
December 1, 2015: International Journal of Radiation Oncology, Biology, Physics
Celia P Kaplan, Anna Maria Nápoles, Steven Narine, Steven Gregorich, Jennifer Livaudais-Toman, Tung Nguyen, Yan Leykin, Mack Roach, Eric J Small
BACKGROUND: Enrollment of minorities in clinical trials remains low. Through a California population-based study of men with early stage prostate cancer, we examined the relationships between race/ethnicity and 1) attitudes, 2) knowledge and 3) willingness to participate in clinical trials. METHODS: From November 2011-November 2012, we identified all incident cases of prostate cancer in African American, Latino, and Asian American men ages 18-75 years, and a random sample of white men diagnosed in 2008, through the California Cancer Registry, living within 60 miles of a site offering ≥ 1 clinical trial...
November 2015: Contemporary Clinical Trials
David R Raleigh, Albert J Chang, Bryan Tomlin, J Adam Cunha, Steve E Braunstein, Katsuto Shinohara, Alexander R Gottschalk, Mack Roach, I-Chow Hsu
PURPOSE: High-dose-rate (HDR) brachytherapy alone is an effective treatment option for patients with early-stage prostate cancer. The purpose of this study was to quantify patient-reported short- and long-term toxicity and quality of life (QOL) after HDR monotherapy. METHODS AND MATERIALS: Thirty-nine consecutive men between May 2001 and January 2012 were identified for this analysis. All patients underwent definitive HDR monotherapy for favorable prostate cancer to a total dose of 3150 cGy in three fractions, 3800 cGy in four fractions, or 3850 in five fractions...
November 2015: Brachytherapy
Mohamed Jalloh, Michael S Leapman, Janet E Cowan, Katsuto Shinohara, Kirsten L Greene, Mack Roach, Albert J Chang, June M Chan, Jeffry P Simko, Peter R Carroll
PURPOSE: Little is known about patterns of local failure following radiation therapy for prostate cancer. We aimed to characterize post-radiation biopsy findings, including the treatment effect and the zonal distribution of recurrent disease after radiation therapy, in men experiencing biochemical recurrence. MATERIALS AND METHODS: We identified patients who received post-radiation biopsy in the setting of biochemical recurrence following primary radiation for localized disease...
October 2015: Journal of Urology
Alberto Bossi, Thomas Wiegel, Mack Roach
No abstract text is available yet for this article.
November 2015: European Urology
Zachary A Seymour, Albert J Chang, Li Zhang, Neil Kirby, Martina Descovich, Mack Roach, I-Chow Hsu, Alexander R Gottschalk
PURPOSE: The purpose of this study was to evaluate the dose-volume relationships of genitourinary toxicity after stereotactic body radiation therapy (SBRT) monotherapy for prostate cancer. METHODS AND MATERIALS: Fifty-six patients diagnosed with low- to intermediate-risk prostate cancer treated with SBRT alone were reviewed retrospectively. All patients received a total dose of 38 Gy in 4 fractions with a planning target volume expansion of 2 mm. Overall, acute, and late genitourinary toxicity were documented according to the Common Terminology Criteria for Adverse Events (version 4) and International Prostate Symptom Scores (IPSS)...
September 2015: Practical Radiation Oncology
Charles C Hsu, Alan T Paciorek, Matthew R Cooperberg, Mack Roach, I-Chow J Hsu, Peter R Carroll
OBJECTIVE: To evaluate among radical prostatectomy (RP) patients at high-risk of recurrence whether the timing of postoperative radiation therapy (RT) (adjuvant, early salvage with detectable post-RP prostate-specific antigen [PSA], or 'late' salvage with a PSA level of >1.0 ng/mL) is significantly associated with overall survival (OS), prostate-cancer specific survival or metastasis-free survival, in a longitudinal cohort. PATIENTS AND METHODS: Of 6 176 RP patients in the Cancer of the Prostate Strategic Urologic Research Endeavor (CaPSURE), 305 patients with high-risk pathological features (margin positivity, Gleason score 8-10, or pT3-4) who underwent postoperative RT were examined, either in the adjuvant (≤6 months after RP with undetectable PSA levels, 76 patients) or salvage setting (>6 months after RP or pre-RT PSA level of >0...
November 2015: BJU International
David R Raleigh, I-Chow Hsu, Steve Braunstein, Albert J Chang, Jeffry P Simko, Mack Roach
PURPOSE: Prostate cancer seeding after needle biopsy has been reported in the perineum, rectal wall, and periprostatic soft tissue. In this article, we report the results of a localized prostate cancer recurrence in the bladder following protrusion of a single high-dose-rate brachytherapy catheter through the bladder wall at the ultimate site of failure. METHOD AND MATERIALS: A 62-year-old man with high-risk prostate adenocarcinoma was treated with long-term androgen deprivation therapy, intensity-modulated radiation, and high-dose-rate brachytherapy boost...
March 2015: Brachytherapy
Mack Roach
No abstract text is available yet for this article.
June 2015: European Urology
Chien P Chen, Steve Braunstein, Michelle Mourad, I-Chow J Hsu, Daphne Haas-Kogan, Mack Roach, Shannon E Fogh
PURPOSE: Accurate International Classification of Diseases (ICD) diagnosis coding is critical for patient care, billing purposes, and research endeavors. In this single-institution study, we evaluated our baseline ICD-9 (9th revision) diagnosis coding accuracy, identified the most common errors contributing to inaccurate coding, and implemented a multimodality strategy to improve radiation oncology coding. METHODS AND MATERIALS: We prospectively studied ICD-9 coding accuracy in our radiation therapy--specific electronic medical record system...
January 2015: Practical Radiation Oncology
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