Radiation enhancement using focussed ultrasound-stimulated microbubbles for breast cancer: A Phase 1 clinical trial.

BACKGROUND: Preclinical studies have demonstrated that tumour cell death can be enhanced 10- to 40-fold when radiotherapy is combined with focussed ultrasound-stimulated microbubble (FUS-MB) treatment. The acoustic exposure of microbubbles (intravascular gas microspheres) within the target volume causes bubble cavitation, which induces perturbation of tumour vasculature and activates endothelial cell apoptotic pathways responsible for the ablative effect of stereotactic body radiotherapy. Subsequent irradiation of a microbubble-sensitised tumour causes rapid increased tumour death. The study here presents the mature safety and efficacy outcomes of magnetic resonance (MR)-guided FUS-MB (MRgFUS-MB) treatment, a radioenhancement therapy for breast cancer. METHODS AND FINDINGS: This prospective, single-center, single-arm Phase 1 clinical trial included patients with stages I-IV breast cancer with in situ tumours for whom breast or chest wall radiotherapy was deemed adequate by a multidisciplinary team (clinicaltrials.gov identifier: NCT04431674). Patients were excluded if they had contraindications for contrast-enhanced MR or microbubble administration. Patients underwent 2 to 3 MRgFUS-MB treatments throughout radiotherapy. An MR-coupled focussed ultrasound device operating at 800 kHz and 570 kPa peak negative pressure was used to sonicate intravenously administrated microbubbles within the MR-guided target volume. The primary outcome was acute toxicity per Common Terminology Criteria for Adverse Events (CTCAE) v5.0. Secondary outcomes were tumour response at 3 months and local control (LC). A total of 21 female patients presenting with 23 primary breast tumours were enrolled and allocated to intervention between August/2020 and November/2022. Three patients subsequently withdrew consent and, therefore, 18 patients with 20 tumours were included in the safety and LC analyses. Two patients died due to progressive metastatic disease before 3 months following treatment completion and were excluded from the tumour response analysis. The prescribed radiation doses were 20 Gy/5 fractions (40%, n = 8/20), 30 to 35 Gy/5 fractions (35%, n = 7/20), 30 to 40 Gy/10 fractions (15%, n = 3/20), and 66 Gy/33 fractions (10%, n = 2/20). The median follow-up was 9 months (range, 0.3 to 29). Radiation dermatitis was the most common acute toxicity (Grade 1 in 16/20, Grade 2 in 1/20, and Grade 3 in 2/20). One patient developed grade 1 allergic reaction possibly related to microbubbles administration. At 3 months, 18 tumours were evaluated for response: 9 exhibited complete response (50%, n = 9/18), 6 partial response (33%, n = 6/18), 2 stable disease (11%, n = 2/18), and 1 progressive disease (6%, n = 1/18). Further follow-up of responses indicated that the 6-, 12-, and 24-month LC rates were 94% (95% confidence interval [CI] [84%, 100%]), 88% (95% CI [75%, 100%]), and 76% (95% CI [54%, 100%]), respectively. The study's limitations include variable tumour sizes and dose fractionation regimens and the anticipated small sample size typical for a Phase 1 clinical trial. CONCLUSIONS: MRgFUS-MB is an innovative radioenhancement therapy associated with a safe profile, potentially promising responses, and durable LC. These results warrant validation in Phase 2 clinical trials. TRIAL REGISTRATION: clinicaltrials.gov, identifier NCT04431674.

An Exploration of the Pillars of Leadership in Cancer Education.

Leadership plays a key role in cancer education (CE) and the success of its practices. Leaders in CE must effectively use their leadership skills to be able to communicate, collaborate, and educate their team members. There is a lack of formalized and standardized curriculums for institutions in developing leadership programs, including what themes to focus on in CE. In this article, the authors describe key pillars of leadership in CE that have presented themselves throughout their experience and within the literature. A search was conducted using the Ovid MEDLINE® database and articles were reviewed for eligibility. In this review, thirty articles were selected for their relevance to CE. With this literature search and the authors' reflections, four pillars of leadership in CE were identified: (1) leadership development, (2) collaboration, (3) diversity and equity, and (4) implementation. Within these themes, key areas of importance were discussed further, and barriers to CE leadership were identified. By reflecting upon pillars of leadership in CE, this article may be helpful for developing future leadership programs within CE. It is vital that initiatives continue to be held and barriers are addressed to increase leadership effectiveness within CE.

Leadership, Leading, and Influencing Change in Cancer Education: Development and Assessment of a Pilot Leadership Workshop in Cancer Education for Interdisciplinary Healthcare Staff.

Effective leaders in healthcare settings create a motivating work environment, initiate changes in practice, and facilitate interdisciplinary collaboration to advance patient-centered care. Health professionals in cancer education need leadership development to meet the continued rise in cancer cases and to keep up with the rapid biomedical and technological advances in global cancer care. In addition, leadership development in cancer education supports interprofessional collaboration, optimizes patient engagement, and provides mentorship opportunities necessary for career advancement and skill development. The identified benefits from leadership development in cancer education led to the creation of an interactive pilot leadership workshop titled "Essential Skills in Cancer Education: Leadership, Leading, and Influencing Change in Cancer Education," held at the International Cancer Education Conference in October 2020. The workshop was led by global leaders in cancer education and utilized lectures, mentorship opportunities, interactive case studies, and individual learning projects to develop leadership skills in multidisciplinary oncology professionals. Fifteen attendees from diverse educational backgrounds and levels of experience participated in the virtual leadership workshop and mentorship program. Following the workshop, participants reported an increase in knowledge regarding how to use different leadership styles, initiate changes in practice, and apply leadership skills in their career development and at their institutions. The feedback received from participants through post-workshop evaluations was overall positive and demonstrated an interest for more leadership development opportunities in cancer education. This pilot workshop shows that leadership is a valuable and teachable skill that will benefit both healthcare professionals and patients in the field of cancer education.

Continuing Professional Development Needs Amongst University of Toronto's Department of Radiation Oncology Faculty.

Continuing professional development (CPD) and lifelong learning are core tenets of most healthcare disciplines. Where undergraduate coursework lays the foundation for entry into practice, CPD courses and offerings are designed to aid clinicians in maintaining these competencies. CPD offerings need to be frequently revised and updated to ensure their continued utility. The purpose of this qualitative study was to better understand the CPD needs of members of the University of Toronto's Department of Radiation Oncology (UTDRO) and determine how these needs could be generalized to other CPD programs. Given that UTDRO consists of members of various health disciplines (radiation therapist, medical physicists, radiation oncologists, etc.), eleven semi-structured interviews were conducted with various health professionals from UTDRO. Inductive thematic analysis using qualitative data processing with NVivo® was undertaken. The data was coded, sorted into categories, and subsequently reviewed for emergent themes. Participants noted that a general lack of awareness and lack of access made participation in CPD programs difficult. Members also noted that topics were often impractical, irrelevant, or not inclusive of different professions. Some participants did not feel motivated to engage in CPD offerings due to a general lack of time and lack of incentive. To address the deficiencies of CPD programs, a formal needs assessment that engages stakeholders from different centers and health professions is required. Needs assessments of CPD programs should include analyzing elements related to access, how to utilize technology-enhanced learning (TEL), determine barriers to participation, and understand how to better engage members.

Mentorship in Medicine and Other Health Professions.

Mentoring skills are valuable assets for academic medicine and allied health faculty, who influence and help shape the careers of the next generation of healthcare providers. Mentors are role models who also act as guides for students' personal and professional development over time. Mentors can be instrumental in conveying explicit academic knowledge required to master curriculum content. Importantly, they can enhance implicit knowledge about the "hidden curriculum" of professionalism, ethics, values, and the art of medicine not learned from texts. In many cases, mentors also provide emotional support and encouragement. It must be noted that to be an effective mentor, one must engage in ongoing learning in order to strengthen and further mentoring skills. Thus, learning communities can provide support, education, and personal development for the mentor. The relationship benefits mentors as well through greater productivity, career satisfaction, and personal gratification. Maximizing the satisfaction and productivity of such relationships entails self-awareness, focus, mutual respect, and explicit communication about the relationship. In this article, the authors describe the development of optimal mentoring relationships, emphasizing the importance of different approaches to mentorship, roles of the mentors and mentees, mentor and mentee benefits, interprofessional mentorships for teams, gender and mentorship, and culture and mentorship.

National Survey Among Radiation Oncology Residents Related to Their Needs in Geriatric Oncology.

Currently, there is no formal curriculum addressing geriatric oncology within Canadian radiation oncology (RO) residency programs. Knowledge related to geriatric medicine may help radiation oncologists modify RT based on frailty status and geriatric considerations. Understanding specific learning needs allow program coordinators to align the current curriculum with residents' geriatric oncology learning needs. The purpose of this study is to determine the geriatric oncology educational needs of the Canadian RO residents and to inform Canadian RO residency training. A cross-sectional survey, with Likert, multiple choice, and open-ended questions, was pretested and distributed electronically by program directors to Canadian RO residents over 6 weeks. Responses were analyzed with descriptive statistics and common themes. One-hundred and thirty-five Canadian RO residents were contacted and 63 responded (47%). Half (49%) lacked confidence managing the elderly with multiple comorbidities, polypharmacy, functional and cognitive impairment, and challenging social circumstances;73% agreed additional training would be helpful. Forty-four percent lacked confidence regarding psychogeriatric referrals, fall prevention, palliative and hospice care, and community resources preventing re-hospitalization; 63% agreed additional training would be helpful. Seventy-six percent believed discussion groups, continuing education, geriatric oncology electives, and journal clubs would provide learning opportunities. Seventy-one percent agreed integrating geriatric assessment into RO curricula would improve care. Seventy-nine percent believed geriatric oncology principles have not been adequately integrated into radiation oncology curricula. There are significant gaps specific to geriatric assessment and management of older cancer patients in the current Canadian RO curricula. Most residents agreed that it is important to integrate geriatric oncology training to improve and personalize the care of older cancer patients.

Patterns of Care Related to Post-Operative Radiotherapy for Patients with Prostate Cancer among Canadian Radiation Oncologists and Urologists.

The American Society for Radiation Oncology (ASTRO) and American Urological Association (AUA) developed post-prostatectomy radiotherapy (RT) guidelines to aid patient counseling on adjuvant (ART) and salvage radiotherapy (SRT). Our study compared how aware and compliant Canadian radiation oncologists and urologists are to these guidelines. Our online survey was distributed through the Canadian Association of Radiation Oncology (CARO) and Canadian Urology Association (CUA) to radiation oncologists and urologists that treat prostate cancer. We used Wilcoxon rank-sum test and Chi-square test to compare radiation oncologists and urologists. P values for significant findings are reported. A total of 128 participants responded the survey, 52 radiation oncologists, and 76 urologists. The majority (82%) of radiation oncologists had read these guidelines, compared to only 49% of urologists (p < 0.001). Radiation oncologists were more likely to recommend ART >50% for adverse pathological findings post-radical prostatectomy compared to urologists (76 vs. 51%, p = 0.011). Urologists were more likely to monitor their patient's PSA level post-prostatectomy compared to radiation oncologists (93 vs. 77%, p = 0.016). Post-thematic analysis of open-ended questions revealed that urologists rarely refer patients to radiation oncologists for ART, with radiation oncologists confirming that they rarely receive referrals. This study demonstrates the low compliance to ASTRO/AUA guidelines. While radiation oncologists were more aware and compliant to guidelines, urologists were significantly more likely to monitor their patient's PSA. This study highlighted the need for better communication between urologists and radiation oncologists, especially in referrals for ART, to facilitate treatment delivery that is concordant with ASTRO/AUA guidelines.

Breast Cancer Patients' Preferences for Adjuvant Radiotherapy Post Lumpectomy: Whole Breast Irradiation vs. Partial Breast Irradiation-Single Institutional Study.

This study was conducted to elucidate patients with early breast cancer preference for standard whole breast irradiation (WBI) or partial breast irradiation (PBI) following lumpectomy, as well as identify important factors for patients when making their treatment decisions. Based on relevant literature and ASTRO consensus statement guidelines, an educational tool and questionnaire were developed. Consenting, eligible women reviewed the educational tool and completed the trade-off questionnaire. Descriptive statistics were calculated, as well as chi-squares and a logistic regression model. Of the 90 patients who completed the study, 62 % preferred WBI, 30 % preferred PBI, 4 % required more information, and 3 % had no preferences. Of the patients who chose WBI, 58 % preferred hypofractionated RT, whereas 25 % preferred the conventional RT regimen. The majority of patients rated recurrence rate [WBI = 55/55 (100 %), PBI = 26/26 (100 %)] and survival [WBI = 54/55 (98 %), PBI = 26/26 (100 %)] as important factors contributing to their choice of treatment preference. Financial factors [WBI = 21/55 (38 %), PBI = 14/26 (53 %)] and convenience [WBI = 36/54 (67 %), PBI = 18/26 (69 %)] were rated as important less frequently. Significantly, more patients who preferred WBI also rated standard method of treatment as important when compared to patients who preferred PBI [WBI = 52/54 (96 %), PBI = 16/26 (61 %), χ 2 = 16.63, p = 0.001]. The majority of patients with early breast cancer who were surveyed for this study preferred WBI as an adjuvant treatment post lumpectomy, yet there was a sizeable minority who preferred PBI. This was associated with the importance patients place on standard treatment. These results will help medical professionals treat patients according to patient values.

Developing and Evaluating Multimedia Patient Education Tools to Better Prepare Prostate-Cancer Patients for Radiotherapy Treatment (Randomized Study).

The purpose of this study is to determine the effectiveness of multimedia educational tools to improve CT planning preparation for intensity modulated radiotherapy (IMRT) for prostate cancer. Many patients are not prepared when given verbal preparation instructions to have a full bladder and empty rectum for their IMRT and require being rescanned, which results in additional costs for the patient and the hospital. A pamphlet and video outlining the proper preparation for prostate IMRT was created to decrease additional scans and the associated costs, while increasing patient satisfaction. A controlled, randomized experimental group study was conducted to examine the effectiveness of the multimedia tools (the video and the pamphlet), as compared to the pamphlet only, in preparing patients for their planning CT appointment. We found no statistical difference between the multimedia group and the pamphlet group in patients' preparedness for their appointments and the rescanning rate. However, patients in the multimedia group indicated that they felt more prepared about their treatment after watching the video and stated that they would recommend the video to other patients with prostate cancer. Furthermore, patients who had to wait longer for their planning CT appointment felt less prepared by the materials than those with a shorter wait time. We recommend reducing wait times between appointments as much as possible to increase patients' preparedness for the planning CT. We conclude that providing multimedia treatment information and minimizing wait times increases patients' feelings of preparedness leading to a more positive treatment experience and reducing costly rescans. TRIAL REGISTRATION: ClinicalTrials.gov NCT02410291.

The Senior Toronto Oncology Panel (STOP) Study: Research Participation for Older Adults With Cancer and Caregivers.

Background: Patient engagement in research may lead to better-designed studies and improved health outcomes. The objectives of this study were to identify the research priorities of older adults with cancer (OAWCs) and their caregivers and examine how to engage these individuals in research teams and what supports are needed. Methods: We conducted 3 public meetings and 7 focus groups to delineate research priorities and the supports needed to facilitate integration of OAWCs and their caregivers on research teams. Results: A total of 33 older adults and 19 caregivers attended a public meeting and 27 older adults and 17 caregivers participated in a focus group. Most of the OAWCs and their caregivers had never participated in research before. Three themes were identified from the focus groups: (1) motivation to be on a team; (2) ability to make meaningful contributions; and (3) logistical considerations to facilitate engagement. Most participants were motivated to be a research team member and be involved in all steps of research if it could benefit them or future patients and caregivers. OAWCs and their caregivers were highly motivated to improve outcomes. Required logistics included flexibility regarding time and location, accessibility to computer technology, transportation support, materials worded in lay language, and attending/having short training sessions, as well as the presence of peer support. Conclusions: OAWCs and their caregivers are very motivated and willing to participate in research and to be research team members. Logistics and the social aspects of being on a team are important.

The Perceptions and Expectations of Older Women in the Establishment of the Senior Women's Breast Cancer Clinic (SWBCC): a Needs Assessment Study.

This study explored older women's perceptions and expectations of the prospective Senior Women's Breast Cancer Clinic (SWBCC) at Sunnybrook Odette Cancer Centre (SOCC) in Toronto, Ontario, Canada. In our previous studies, older breast cancer patients had expressed a greater need for informational, decisional, and post-treatment support. This study also assessed women's perspectives on the involvement of geriatricians and incorporation of geriatric assessment in their cancer care. Twelve breast cancer patients aged 68 years or older who were treated at the SOCC participated in the study. We recorded and transcribed 11 interviews and analyzed them using qualitative thematic analysis methods to identify major themes; one interview was excluded due to recording defect. Eight major themes were identified: transportation issues, service, communication between patient and healthcare professionals, communication between healthcare professionals, support during treatment, support after treatment, informational resources, and patient suggestions. Important issues were raised by participants, such as difficulties in arranging transportation to the clinic, barriers in accessing family physician service, and communication breakdown that result in treatment delay and unaddressed complications. In conclusion, there were important gaps in the cancer care of older women with breast cancer that could be detected earlier and better addressed in the new multidisciplinary SWBCC. The participating women were highly supportive of the initiative and made several suggestions on how the clinic could better accommodate their specific needs during and after breast cancer treatment.

Student Accomplishments in the Rapid Response Radiotherapy Program: A 10-Year Review.

In 1996, the Toronto Sunnybrook Regional Cancer Centre developed the Rapid Response Radiotherapy Program (RRRP). The objective of this clinic is to consult, simulate, plan, and treat patients with palliative radiotherapy on the same day. In 2004, the RRRP initiated a program to provide clinical and research experience to undergraduate students interested in health sciences. The purpose of this study is to review the 10-year (2004-2013) experience of the RRRP and to examine whether the goals of the student program have been met. Students who worked in the RRRP from 2004 to 2013 were contacted to complete a short survey regarding their overall experience with the program and their current endeavors. Student accomplishments were collected from an internal database as well as PubMed. Descriptive statistics were used to analyze results. A total of 54 students from ten postsecondary institutions have worked in the RRRP; 29 were from the University of Waterloo undergraduate co-op program. In total, 214 articles with first authorship from students were published, 93 (43%) of which can be found on PubMed. Other accomplishments include 40 book chapters, 58 invited presentations, and 99 awards cumulatively. Qualitative data regarding student perspectives of their experience in the RRRP were also analyzed. Over the past 10 years, the RRRP has achieved its goal of providing quality medical and research experience to students interested in the health sciences. Using the responses of past and present students, we hope to continue to shape our program and provide unique opportunities to future students.

Towards an optimal multidisciplinary approach to breast cancer treatment for older women.

The treatment of breast cancer presents specifc concerns that are unique to the needs of older female patients. While treatment of early breast cancer does not vary greatly with age, the optimal management of older women with breast cancer often requires complex interdisciplinary supportive care due to multiple comorbidities. This article reviews optimal approaches to breast cancer in women 65 years and older from an interdisciplinary perspective. A literature review was conducted using MEDLINE and EMBASE, choosing articles concentrated on the management of older breast cancer patients from the point of view of several disciplines, including geriatrics, radiation oncology, medical oncology, surgical oncology, psychooncology, palliative care, nursing, and social work. This patient population requires interprofessional collaboration from the time of diagnosis, throughout treatment and into the recovery period. Thus, we recommend an interdisciplinary program dedicated to the treat ment of older women with breast cancer to optimize their cancer care.

Exploring attitudes of Canadian radiation oncologists, radiation therapists, physicists, and oncology nurses regarding interprofessional teaching and learning.

The purposes of this exploratory study were to investigate the attitudes of radiation oncology professionals regarding interprofessional (IP) teaching and interprofessional education (IPE), to identify the challenges faced by radiation oncologists who teach within an IP context, and to discover new strategies to aid professionals teaching IP students. A questionnaire was developed through the review of existing literature on IPE using Medline. The proposed group of questions was selected by educators from different professions actively involved in IPE. The final revised questionnaire consisted of three main domains assessing the understanding of IP concepts, attitudes toward IP teaching and learning environments, and attitudes toward health-care teams. An open-ended comment section was included. The questionnaire was administered to health-care professionals (physicists, radiation oncologists, and radiation therapists) nationally through SurveyMonkey® (electronic survey). A total of 220 respondents provided demographic information. Half of these respondents indicated that they previously received education relating to IPE. A high level of agreement was received for nearly all the questions. There were no significant statistical differences among the three different professional respondent groups for any question. Overall, most of the respondents demonstrated a good knowledge and understanding of IP concepts and advocated IP training and collaboration.

Educating our patients collaboratively: a novel interprofessional approach.

Providing cancer patients with more information regarding their treatments allows them to feel more in control, increases self efficacy, and can decrease anxiety. The aims of the present study were to develop an interprofessional group education session and to evaluate the usefulness and acceptability of this session. In addition, informational distress levels pre- and post-education were evaluated. A prostate radiation therapy (RT) education session was developed and facilitated by an interprofessional team. Topics discussed included how RT works, side effects and management, and support services available. Prior to the education session, participants reported their informational RT distress levels using the validated Distress Thermometer (DT). Post-education session, the DT was readministered. In addition, participants completed an acceptability survey to assess format, structure, and usefulness of the education session. Participants agreed that the session contained valuable and useful information helping them understand expectations during treatment, including resource availability, side effects and management, as well as procedural expectation during treatment. All stated they would recommend the session to other patients. The interprofessional nature of the sessions was deemed useful. Suggested areas for improvement included addition of a dietitian, information on long-term side effects, statistics of radiotherapy side effects, impact of radiotherapy on sexual function, and overall quality of life. The group education session significantly improved informational distress levels (p = 0.04). Educating prostate cancer patients utilizing an interprofessional group format can decrease anxiety and stress related to their RT treatment. Future development of group education sessions for other disease site groups may be valuable.

Decisional support throughout the cancer journey for older women diagnosed with early stage breast cancer: a single institutional study.

To determine if older women with early stage breast cancer have sufficient decisional support during their breast cancer journey, a questionnaire-based study was conducted at the Sunnybrook Odette Cancer Centre, in Toronto, Ontario, Canada. Women with stages I and II breast cancer, ≥60 years, were contacted upon completion of their adjuvant treatment. A questionnaire was developed based on focus groups, the literature, and consultation with patients and a multidisciplinary team of experts. The questionnaire was divided into six domains as follows: (1) information support surrounding diagnosis, (2) impact of cancer diagnosis on the patient, (3) quality of interaction with healthcare team, (4) decisional support from the healthcare team, (5) additional information needs surrounding treatment decision, and (6) information support during radiation treatment. Ninety-two of 137 patients approached were included in the analysis. Ninety percent were > 60 years at the time of diagnosis and 65% had stage I invasive breast cancer. The majority of women received adequate decisional support during their cancer journey. Approximately 90% of women indicated that they received a high level of support during their cancer diagnosis. We found no significant differences in overall decisional support based on age at diagnosis, education level, ethnicity, or the presence of co-morbidities. However, participants desired additional educational resources such as a worksheet, consultation summary, or workbook to assist in making a treatment decision. The majority of participants felt that they had sufficient support while making a treatment decision for breast cancer.

Randomized Trial of Concomitant Hypofractionated Intensity Modulated Radiation Therapy Boost Versus Conventionally Fractionated Intensity Modulated Radiation Therapy Boost for Localized High-Risk Prostate Cancer (pHART2-RCT).

PURPOSE: The aim of this work is to report on the results of a phase 2 randomized trial of moderately hypofractionated (MH) versus conventionally fractionated (CF) radiation therapy to the prostate with elective nodal irradiation. METHODS AND MATERIALS: This was a single-center, prospective, phase 2 randomized study. Patients with high-risk disease (cT3, prostate-specific antigen level >20 ng/mL, or Gleason score 8-10) were eligible. Patients were randomized to either MH using a simultaneous integrated boost (68 Gy in 25 fractions to prostate; 48 Gy to pelvis) or CF (46 Gy in 23 fractions with a sequential boost to the prostate of 32 Gy in 16 fractions), with long-term androgen deprivation therapy. The primary endpoint was grade ≥2 acute gastrointestinal (GI) and genitourinary (GU) toxicity (Common Terminology Criteria for Adverse Events version 3.0). Secondary endpoints included late GI and GU toxicity, quality of life, and oncologic outcomes. RESULTS: One-hundred eighty patients were enrolled; 90 were randomized to and received MH and 90 to CF. The median follow-up was 67.4 months. Seventy-five patients (41.7%) experienced a grade ≥2 acute GI and/or GU toxicity, including 34 (37.8%) in the MH and 41 (45.6%) in the CF arms, respectively (P = .29). Late grade ≥2 GI (P = .07) and GU (P = .25) toxicity was not significantly different between arms; however, late grade ≥3 GI toxicity was worse in the MH group (P = .01). There were no statistically significant quality-of-life differences between the 2 treatments. There were no statistically significant differences observed in cumulative incidence of biochemical failure (P = .71) or distant metastasis (P = .31) and overall survival (P = .46). CONCLUSIONS: MH to the prostate and pelvis with androgen deprivation therapy for men with high-risk localized prostate cancer was not significantly different than CF with regard to acute toxicity, quality of life, and oncologic efficacy. However, late grade ≥3 GI toxicity was more common in the MH arm.