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• Infants treated with proton therapy have similar disease control to their older counterparts. • Young age may not be an adverse prognostic factor if patients receive standard radiation doses. • Rhabdomyosarcoma of the nasal ala in infants may signify a distinctly poor prognosis. • Toxicity data suggest evidence of hypoplasia among survivors. In infants with rhabdomyosarcoma, young age is considered an adverse prognostic factor and treatment is often attenuated to reduce side effects. Proton therapy may improve the therapeutic ratio in these patients. We report outcomes in infants with rhabdomyosarcoma treated with proton therapy. Between 2009 and 2019, 37 infants <24 months old with non-metastatic rhabdomyosarcoma received proton therapy. Local control (LC), progression-free survival (PFS), and overall survival (OS) were estimated using the Kaplan–Meier product limit. The log-rank test assessed significance between selected prognostic factors. Toxicity was graded per CTCAEv5.0. Median follow-up was 5.1 years. Overall, 76% of patients had an unfavorable primary site. Median dose was 50.4GyRBE. At 5 years, LC, PFS, and OS rates were 83%, 78%, and 83%. On univariate analysis, 5-year LC and OS were inferior for favorable versus unfavorable disease sites (67% vs 89%, 67% vs 89%, respectively; p <.05) and 5-year OS was superior in stage 3 versus stage 1–2 disease (91% vs 69%; p =.05), owing to inclusion of nasal ala patients among stage 1. Of 9 recurrences, 7 were in-field, 4 occurring in infants with nasal ala primaries. Recategorizing nasal ala as an unfavorable site resulted in 100% 5-year LC and OS for favorable sites. Six infants experienced late grade 3 toxicity. None developed grade 4 or 5 late toxicity. Young age alone may not be an adverse prognostic factor provided infants receive local therapy similar to older children. Consideration should be given to classifying nasal ala primaries as an unfavorable site. [ABSTRACT FROM AUTHOR]

Purpose: The geographic distribution of practicing radiation oncologists is of concern for multiple stakeholders within the field. Employment outcomes of graduating residents can affect that distribution, and they are of major concern to current residents. Data investigating employment outcomes of recent graduates are sparse. We aimed to analyze the employment outcomes of the radiation oncology residency class of 2019.Methods and Materials: Using publicly available information, we identified the employment of 179 of 183 graduating residents in the class of 2019. For each, the place of employment, residency program, and medical school were geocoded using Google Maps. We used the rural-urban continuum code (RUCC) published by the United States Department of Agriculture to determine the rurality of each location and compared employment outcomes by RUCC and program size.Results: Two thirds of graduates (66%) took a position in a county within a metropolitan area with a population greater than 1,000,000 people; only 3.4% took a position in a county outside of a metropolitan area. Graduates of smaller programs (≤6 residents) and those in smaller metropolitan areas were more likely to take positions in smaller metropolitan areas or nonmetropolitan areas. The geographic distance between location of employment and residency program did not significantly vary by program size or size of metropolitan area where a residency program was located.Conclusions: Among the class of 2019, a small proportion took positions in nonmetropolitan areas. Smaller programs and those in smaller metropolitan areas may be more likely to produce graduates that practice in similar settings, but those graduates might not do so locally. We advocate for a centralized, prospective data collection of employment outcomes for graduating residents to refine these analyses and to reduce employment prospect information asymmetry for trainees. [ABSTRACT FROM AUTHOR]

The geographic distribution of radiation oncologists determines access to care for patients and job opportunities for practicing physicians, yet available data on practicing radiation oncologists are outdated or use large geographic unit definitions precluding granular analysis. We present an updated county-level analysis of the American radiation oncology workforce. We used the Area Health Resource File published by the Health Resources and Services Administration of the U.S. Department of Health and Human Services to determine the number of radiation oncologists per 100,000 people in every or equivalent area in the United States as of 2017 (the most recently published data). We then analyzed geographic distribution per U.S. Census Bureau–defined regions, subregions, and combined statistical areas. The Area Health Resource File reports 5338 practicing radiation oncologists for an estimated American population of 326.1 million people as of 2017, resulting in a nationwide average of 1.64 radiation oncologists per 100,000 people. Counties located outside of a metropolitan area had a lower density of radiation oncologists than those within a metropolitan area. Among combined statistical areas (representing most large cities) the variations in density of radiation oncologists are small, with the highest-density areas located in smaller communities with academic medical centers. There was no relationship between population of combined statistical areas and density of radiation oncologists. The geographic distribution of American radiation oncologists varies widely; the primary variation exists along the urban/rural continuum, with rural areas having fewer practitioners than urban areas. This analysis informs future work in understanding how to optimize the delivery of radiation oncology services throughout the United States. [ABSTRACT FROM AUTHOR]

Purpose: Data regarding the amount and use of nonclinical time (NCT) in radiation oncology residency programs are scarce. We surveyed every U.S. radiation oncology residency program to obtain benchmark data to inform decisions about optimal program structure.Methods and Materials: An anonymous, web-based survey was distributed to postgraduate year 5 residents at Accreditation Council for Graduate Medical Education-accredited radiation oncology training programs. The survey included 33 yes/no, Likert-scale, and free-response questions. Program data were analyzed for all programs, including those considered "top 10" per Doximity and those "not top 10." Likert-scale responses were dichotomized as "not as satisfied" (1, 2, 3) or "very satisfied" (4, 5).Results: One hundred twenty-six residents (69%) completed the survey. Program-specific data were obtained for 100% of programs (n = 82). Almost all training programs (98%) provide residents with protected NCT. Including programs with no NCT, the median NCT is 10 months in all programs. The median NCT is 12 months in "top 10" programs and 9 months in "not top 10" programs (P < .01). Most programs (68%) reported >6 months of NCT. The proportion of residents wanting more NCT decreased as the amount of NCT increased (73%, 52%, and 19% for 4-6, 7-9, and 10-12 months, respectively; P < .01). The proportion of residents who were very satisfied with NCT flexibility increased with more NCT (64%, 79%, and 94% for 4-6, 7-9, and 10-12 months, respectively; P < .01), as did the proportion of residents who were very satisfied with accomplishments during NCT (35%, 53%, and 72% for 4-6, 7-9, and 10-12 months, respectively; P < .01). When asked whether residents would theoretically give up some NCT to shorten residency, the proportion of residents willing to shorten their residencies decreased as the amount of NCT increased (65%, 47%, and 33% for 4-6, 7-9, and 10-12 months respectively; P = .04).Conclusions: Programs should maintain an emphasis on NCT and implement measures to ensure meaningful resident experiences. [ABSTRACT FROM AUTHOR]

Disparities in geographic access to medical care exist in nearly all fields of medicine including radiation oncology. We aim to update knowledge of the geographic distribution of radiation oncologists in the United States. We used the Physician and Other Supplier Public Use File (PUF) from the Centers for Medicare & Medicaid Services (CMS) as well as the International Atomic Energy Agency (IAEA) Directory of Radiotherapy Centers (DIRAC) database to identify practices that either coded for or are marked as having access to brachytherapy services. Geographic analysis was performed on several levels including United States (US) Census region, Dartmouth Atlas Healthcare Referral Region, and the county level. We identified 327 providers that billed for a brachytherapy code during the calendar year 2018 and 564 facilities providing brachytherapy. Within the 306 HRRs in the US, 149 have access to brachytherapy. This represents 247.5 million people based on 2018 estimates of population from the US Census Bureau. This implies that 76.7% of people within the US live in an HRR with access to brachytherapy, and, conversely, that 75.3 million people (23.3%) do not. Numerically, counties in metropolitan areas were more likely to have access to brachytherapy than those outside of a metropolitan area. Geographic disparities exist in access to brachytherapy; metropolitan counties are more likely to have access than non-metropolitan counties. We support continued development of databases of brachytherapy providers and programs that may support travel and lodging costs to minimize these disparities. [ABSTRACT FROM AUTHOR]

Purpose: To assess the optimal structure of an introductory curriculum (IC) for radiation oncology residents, including the perceived utility of a 2-day off-site "boot camp," and evaluate the success of a pilot introductory radiation oncology curriculum (IROC) based on these initial data.Methods and Materials: In the first phase, anonymous, web-based surveys were sent to US radiation oncology program directors and residents. Likert-type scores (1, not at all; 5, extremely) are reported as the median and interquartile range. Using the phase 1 results, IROC was developed, piloted, and evaluated.Results: Of the 89 program directors and 697 residents, 47 (53%) and 165 (24%) responded, respectively. Of the 89 program directors, 37 (79%) reported offering a formal IC. However, only 83 residents (50%) reported having a formal IC. Program directors reported resident preparation for clinical training as "moderate" (median 3, interquartile range 2-3) on entering residency and "moderate" (median 3, interquartile range 3-4) after IC completion (P = .03). However, residents only believed they were "slightly" prepared (median 2, interquartile range 1-2) on entering residency and "moderately" (median 3, interquartile range 2-3) prepared after IC completion (P < .01). Program directors believed an off-site boot camp would be of "moderate" utility (median 3, interquartile range 3-4) with participation limited by funding (57%). Residents without an IC reported that having an IC would be "quite" beneficial (median 4, interquartile range 3-5). Residents preferred instruction before the clinical training (49%) and over 1 week (40%). Both program directors and residents rated lectures on radiation emergencies and simulation highly. Using these data, IROC was developed and piloted with incoming residents at 4 institutions. After IROC, residents reported improvement in overall preparedness for clinical training (before: median 1, interquartile range 1-2; vs after: median 3, interquartile range 2-3; P < .01) and among specific practice domains.Conclusions: Beginning radiation oncology residents frequently lack structured introductory curricula but desire instruction before the clinical training with a focus on practical aspects (emergency management, contouring). Program directors recognize the value of both off-site and on-site boot camps. An on-site IC could mitigate funding barriers. A standardized IC, IROC, piloted at 4 programs, showed promising outcomes. [ABSTRACT FROM AUTHOR]

Abstract: Osteosarcoma (OS) is the most common primary malignancy of bone. We investigated the roles of insulin-like growth factor binding protein 5 (IGFBP5) domains in modulating OS tumorigenicity and metastasis. The N-terminal (to a lesser extent the C-terminal) domain inhibited cell proliferation and induced apoptosis while the C-terminal domain inhibited cell migration and invasion. The Linker domain had no independent effects. In vivo, the N-terminal domain decreased tumor growth without affecting pulmonary metastases while the C-terminal domain inhibited tumor growth and metastases. In summary, the N- and C-terminal domains modulated OS tumorigenic phenotypes while the C-terminal domain inhibited OS metastatic phenotypes. [Copyright &y& Elsevier]