All Publications

  • Intracranial Response to Combination BRAF and MEK Inhibitor Therapy in Patients with Metastatic Melanoma Hui, C., Wu, Y., Liu, K., Sandhu, N., Blomain, E., Binkley, M., Gephart, M., Chang, S., Li, G., Reddy, S., Gibbs, I., Soltys, S., Pollom, E. LIPPINCOTT WILLIAMS & WILKINS. 2021: S48-S49
  • Local Recurrence Outcomes of Colorectal Cancer Oligometastases Treated With Stereotactic Ablative Radiotherapy. American journal of clinical oncology Benson, K. R., Sandhu, N., Zhang, C., Ko, R., Toesca, D. A., Lee, P. E., Von Eyben, R., Diehn, M., Gensheimer, M., Maxim, P. G., Bush, K., Loo, B. W., Soltys, S. G., Pollom, E. L., Chang, D. T. 2021


    PURPOSE: The aim of this study was to report local failure (LF) outcomes and associated predictors in patients with oligometastatic colorectal cancer (CRC) treated with stereotactic ablative radiotherapy (SABR).MATERIALS AND METHODS: We retrospectively reviewed patients with CRC metastases to the brain, liver, spine, or lung treated with SABR between 2001 and 2016. Time to LF was summarized using cumulative incidence of LF curves with death as a competing risk.RESULTS: The analysis included a total of 130 patients and 256 lesions. Of the metastases treated, 129 (50%) were brain, 50 (20%) liver, 49 (19%) spine, and 28 (11%) lung. Median gross tumor volume was 24 mL for liver metastases, 2 mL for brain metastases, 4 mL for spine metastases, and 1 mL for lung metastases. The overall 1, 2, and 3-year cumulative incidence of LF rates were 21.6% (16.5, 27.1), 28.2% (22.3, 34.4), and 31.5% (25.2, 38.0), respectively. LF was highest among the liver metastases (1 y: 26.0%, 2 y: 38.5%), followed by spine (1 y: 25.1%, 2 y: 31.1%), brain (1 y: 20%, 2 y: 25.2%), and lung (1 y: 13.7%, 2 y: insufficient data). Metastases from right-sided primary CRC were significantly more likely to have LF (P=0.0146, HR=2.23). Biologically effective dose>70 Gy, defined using a standard linear quadratic model using alpha/beta ratio of 10 on the individual lesion level, and pre-SABR chemotherapy were also significant predictors of LF (P= 0.0009 and 0.018, respectively).CONCLUSIONS: CRC metastases treated with SABR had significantly higher rates of LF if they originated from right-sided primary CRC, compared with left-sided. Liver metastases had the highest rates of LF compared with other metastatic sites. Thus, CRC liver metastases and metastases from right-sided CRC may benefit from more aggressive radiotherapy.

    View details for DOI 10.1097/COC.0000000000000864

    View details for PubMedID 34534143

  • #TrendingNow: Instagram versus Twitter Activity Among Radiation Oncology Patients and Providers. Practical radiation oncology Rahimy, E., Sandhu, N. K., Giao, D. M., Pollom, E. L. 2021


    PURPOSE: We aimed to evaluate recent Instagram and Twitter posts to identify the primary disseminators of information related to radiation therapy on social media (healthcare professionals versus patients), to characterize their influencer status, and to characterize the content of this information.METHODS: Using two commercial hashtag analytics platforms, 1,000 of the most recent eligible posts from each platform were evaluated for content, tone, and engagement, as well as user (poster) characteristics. Inclusion criteria were as follows: unique posts, written in English, relevant to human cancer treatment, and contains one of 11 predetermined hashtags (#radiation, #radiotherapy, #radiationtherapy, #radiationoncology, #radonc, #radiationtherapist #radiationtreatment, #medphys, #cyberknife, #radiosurgery, #protontherapy).RESULTS: Users of radiation oncology content on Instagram were primarily patients/caregivers (47%), specifically adult patients (94%) with breast cancer (53%). Patient/caregiver content was focused on patient experience (79%), with approximately half specific to radiation therapy (51%), and most patient/caregiver posts demonstrated a positive tone (86%). In contrast, Twitter content was dominated by health care professionals (53%), specifically within radiation oncology (90% of unique users). Health care professional content was focused on colleague education/research dissemination (53%), with a high proportion of posts specific to radiation therapy (95%).CONCLUSIONS: Given the disproportionate number of patients versus radiation oncology professionals active on Instagram versus Twitter, and the lack of radiation therapy-specific content on Instagram, there may be an opportunity to improve patient outreach and education by promoting presence of radiation oncologists within Instagram.

    View details for DOI 10.1016/j.prro.2021.06.008

    View details for PubMedID 34233217

  • Networking and Applying to Radiation Oncology During A Pandemic: Cross-Sectional Survey of Medical Student Concerns. Advances in radiation oncology Pollom, E. L., Sandhu, N., Deig, C. R., Obeid, J., Miller, J. A., Kahn, J. M. 2021; 6 (3): 100643


    Purpose: We assessed the effectiveness of a virtual networking session tailored for third- and fourth-year medical students interested in radiation oncology, and report students' concerns about applying to radiation oncology during the pandemic.Methods and Materials: A multi-institutional networking session was hosted on Zoom and included medical students, faculty, and residents from across the country. The breakout room feature was used to divide participants into smaller groups. Participants were randomly shuffled into new groups every 10 to 15 minutes. Students completed pre- and post-session surveys.Results: Among the 134 students who registered, 69 students participated in the session, and 53 students completed a post-session survey. Most students reported the session was valuable or very valuable (79%), and it was easy or very easy to network through the virtual format (66%). After the session, 18 (33.9%) students reported their interest in radiation oncology increased, and 34 (64.2%) reported their interest remained the same. Most students believed COVID-19 (55%) and virtual interviews and platforms (55%) negatively or somewhat negatively affected their ability to select a residency program. Most students (62%) were concerned they will be inaccurately evaluated as an interviewee on a virtual platform. Although 30% agreed or strongly agreed the cost-savings and convenience of virtual interviews outweigh potential downsides, 66% of students were planning to visit cities of interest in person before rank list submission.Conclusions: Medical students reported significant concerns with their ability to be accurately evaluated and to choose among residency programs on a virtual platform. Students found the networking session to be a valuable resource for most students, and programs could continue similar efforts during the residency application cycle to better represent their program while maintaining certain financial and geographic advantages of a virtual environment.

    View details for DOI 10.1016/j.adro.2021.100643

    View details for PubMedID 33748546

  • Radiation Oncology Virtual Education Rotation (ROVER) for Medical Students. International journal of radiation oncology, biology, physics Kahn, J. M., Sandhu, N., von Eyben, R., Deig, C., Obeid, J., Miller, J. A., Pollom, E. 2021


    PURPOSE: We describe the implementation of a novel virtual educational program for medical students, Radiation Oncology Virtual Education Rotation (ROVER), and its impact on student interest and knowledge in radiation oncology.METHODS AND MATERIALS: ROVER comprised a series of virtual educational panels with case-based discussions across disease sites tailored to medical students. These were moderated by radiation oncology residents and included faculty panelists from academic radiation oncology programs across the country. Student pre- and post-session surveys were collected. Paired t-tests were used to compare the pre- and post-session assessment results.RESULTS: Six ROVER sessions were held from June 4, 2020 to August 20, 2020 with a total of 427 medical students registering for at least one session. Of these, 231 students attended at least one session, with 140 completing at least one post-session survey (60.6% response rate). Fourth-year medical students were the largest group represented among attendees (32.0%). Most attendees had exposure to radiation oncology (78.8%) prior to the sessions. Majority of students signed up for these sessions for education (90.6%). Some students signed up for the sessions to help with specialty selection (30.9%) and to network (30.4%). Medical students' understanding of the role of radiation oncology in each disease site (breast, sarcoma, central nervous system, pediatrics, gastrointestinal, genitourinary, gynecologic, lymphoma, lung, and head and neck) was improved by attending each session (pre- versus post-session, p <0.0001 for all disease sites). Over three-quarters of respondents stated they were considering applying or were likely to apply into radiation oncology both before and following the sessions.CONCLUSIONS: ROVER improved medical student perceived knowledge of radiation oncology across all disease sites covered. ROVER fulfills a need for a national medical student education platform for radiation oncology. Future work is warranted to augment virtual and open educational platforms to improve access to radiation oncology education.

    View details for DOI 10.1016/j.ijrobp.2021.03.057

    View details for PubMedID 33845145

  • In Regard to Odei etal. International journal of radiation oncology, biology, physics Kahn, J. M., Sandhu, N., Pollom, E. L. 2021; 109 (2): 639–40

    View details for DOI 10.1016/j.ijrobp.2020.08.067

    View details for PubMedID 33422277

  • Financial Toxicity in Patients with Brain and Spine Metastases. World neurosurgery Koenig, J. L., Sandhu, N. n., Sborov, K. n., Sabolch, A. n., Usoz, M. n., Li, G. n., Gephart, M. H., Chang, S. n., Hiniker, S. n., Soltys, S. G., Pollom, E. L. 2021


    Financial toxicity associated with cancer treatment has a deleterious impact on patient outcomes but has not been well-characterized among patients with metastatic cancers. We characterize the extent of financial toxicity among this population and identify factors associated with financial toxicity.We prospectively surveyed adult patients with brain and spine metastases who received radiosurgery at a large academic medical center between January 2018 and December 2019. Financial toxicity was measured with the Personal Financial Wellness (PFW) Scale.In total, 93 patients were included with a median survival of 17.7 months. Most patients had private insurance (47%) or Medicare with supplemental insurance (42%) while 11% of patients were uninsured or insured by Medicaid/Medicare/Veterans Affairs. 60% of patients were primary income earners of which 52% had dependents. The median PFW score was 7.0 (interquartile range, 5.1-9.1) with financial toxicity reported in 23 (25%) patients. After adjusting for age and education level, private insurance (OR 0.28; p=0.080) was associated with a lower likelihood of financial toxicity. At least one emergency department visit (OR 3.87; p=0.024) and a cancer-related change in employment status (OR 3.63; p=0.036) were associated with greater likelihood of reporting financial toxicity.Most poor prognosis cancer patients with brain and spine metastases treated at a tertiary center are primary income earners and experience financial toxicity. Further studies are warranted to assess the longitudinal impact of financial toxicity in patients with metastatic cancer, particularly those with at least one emergency department visit and a cancer-related change in employment status.

    View details for DOI 10.1016/j.wneu.2021.04.103

    View details for PubMedID 33940276

  • Continuing Medical Student Education During the Coronavirus Disease 2019 (COVID-19) Pandemic: Development of a Virtual Radiation Oncology Clerkship. Advances in radiation oncology Pollom, E. L., Sandhu, N., Frank, J., Miller, J. A., Obeid, J., Kastelowitz, N., Panjwani, N., Soltys, S. G., Bagshaw, H. P., Donaldson, S. S., Horst, K., Beadle, B. M., Chang, D. T., Gibbs, I. 2020; 5 (4): 732–36


    Purpose: Our institution cancelled all in-person clerkships owing to the coronavirus disease 2019 pandemic. In response, we designed a virtual radiation oncology medical student clerkship.Methods and Materials: We convened an advisory panel to design a virtual clerkship curriculum. We implemented clerkship activities using a cloud-based learning management system, video web conferencing systems, and a telemedicine portal. Students completed assessments pre- and postclerkship to provide data to improve future versions of the clerkship.Results: The virtual clerkship spans 2 weeks and is graded pass or fail. Students attend interactive didactic sessions during the first week and participate in virtual clinic and give talks to the department during the second week. Didactic sessions include lectures, case-based discussions, treatment planning seminars, and material adapted from the Radiation Oncology Education Collaborative Study Group curriculum. Students also attend virtual departmental quality assurance rounds, cancer center seminars, and multidisciplinary tumor boards. The enrollment cap was met during the first virtual clerkship period (April 27 through May 8, 2020), with a total of 12 students enrolling.Conclusions: Our virtual clerkship can increase student exposure and engagement in radiation oncology. Data on clerkship outcomes are forthcoming.

    View details for DOI 10.1016/j.adro.2020.05.006

    View details for PubMedID 32775783

  • Impact of Proton Radiotherapy on Treatment Timing in Pediatric and Adult Patients with Central Nervous System Tumors Neuro-Oncology Practice Jin, M. C., Shi, S., Wu, A., Sandhu, N., Xiang, M., Soltys, S. G., Hiniker, S., Li, G., Pollom, E. L. 2020

    View details for DOI 10.1093/nop/npaa034

  • A Review of Newly Diagnosed Glioblastoma. Frontiers in oncology Oronsky, B., Reid, T. R., Oronsky, A., Sandhu, N., Knox, S. J. 2020; 10: 574012


    Glioblastoma is an aggressive and inevitably recurrent primary intra-axial brain tumor with a dismal prognosis. The current mainstay of treatment involves maximally safe surgical resection followed by radiotherapy over a 6-week period with concomitant temozolomide chemotherapy followed by temozolomide maintenance.This review provides a summary of the epidemiological, clinical, histologic and genetic characteristics of newly diagnosed disease as well as the current standard of care and potential future therapeutic prospects.

    View details for DOI 10.3389/fonc.2020.574012

    View details for PubMedID 33614476

  • Stereotactic Radiosurgery for Resected Brain Metastases - Does the Surgical Corridor Need to be Targeted? Practical radiation oncology Shi, S. n., Sandhu, N. n., Jin, M. n., Wang, E. n., Liu, E. n., Jaoude, J. A., Schofield, K. n., Zhang, C. n., Gibbs, I. C., Hancock, S. L., Chang, S. D., Li, G. n., Gephart, M. H., Pollom, E. L., Soltys, S. G. 2020


    Although consensus guidelines for post-resection stereotactic radiosurgery (SRS) for brain metastases recommend the surgical corridor leading to the resection cavity be included in the SRS plan, no study has reported patterns of tumor recurrence based on inclusion or exclusion of the corridor as a target. We reviewed tumor control and toxicity outcomes of post-resection SRS for deep brain metastases based on whether or not the surgical corridor was targeted.We retrospectively reviewed patients who had resected brain metastases treated with SRS between 2007 and 2018 and included only 'deep' tumors (defined as located ≥1.0 cm from the pial surface prior to resection).In 66 deep brain metastases in 64 patients, the surgical corridor was targeted in 43 (65%). There were no statistical differences in the cumulative incidences of progression at 12-months for targeting vs. not targeting the corridor, respectively, for: overall local failure 2% (95% Confidence Interval [CI],0-11%) vs. 9% (95% CI,1-25%; p=0.25), corridor failure 0% (95% CI,0-0%) vs. 9% (95% CI,1-25%; p=0.06), cavity failure 2% (95% CI,0-11%) vs. 0% (95% CI,0-0%; p=0.91), adverse radiation effect 5% (95% CI,1-15%) vs. 13% (95% CI,3-30%; p=0.22). Leptomeningeal disease (7% (95% CI,2-18%) vs. 26% (95% CI,10-45%; p=0.03)) was higher in those without the corridor targeted.Omitting the surgical corridor in post-operative SRS for resected brain metastases was not associated with statistically significant differences in corridor or cavity recurrence or adverse radiation effect. As seen in recent prospective trials of post-resection SRS, the dominant pattern of progression is within the resection cavity; omission of the corridor would yield a smaller SRS volume that could allow for dose escalation to potentially improve local cavity control.

    View details for DOI 10.1016/j.prro.2020.04.009

    View details for PubMedID 32428766

  • Virtual Radiation Oncology Clerkship During the COVID-19 Pandemic and Beyond. International journal of radiation oncology, biology, physics Sandhu, N., Frank, J., von Eyben, R., Miller, J., Obeid, J., Kastelowitz, N., Panjwani, N., Soltys, S., Bagshaw, H. P., Donaldson, S. S., Horst, K., Beadle, B. M., Chang, D. T., Gibbs, I. C., Pollom, E. 2020; 108 (2): 444–51


    PURPOSE: We evaluated the impact of a virtual radiation oncology clerkship.METHODS AND MATERIALS: We developed a 2-week virtual radiation oncology clerkship that launched on April 27, 2020. Clerkship components included a virtual clinic with radiation oncology faculty and residents, didactic lectures, student talks, and supplemental sessions such as tumor boards and chart rounds. Medical students completed pre- and post-clerkship self-assessments. Faculty and resident participants also completed surveys on their experience with virtual lectures and clinics. Pre- and post-clerkship results were compared using a 2-sided paired t test. An analysis of variance model was used to analyze the clerkship components.RESULTS: Twenty-six medical students, including 4 visiting students, enrolled over 2 clerkship periods (4 weeks). All students completed the pre- and post-clerkship self-assessments and agreed that the clerkship improved their understanding of radiation oncology. Compared with 3 (11.5%) students who agreed that they understood the daily responsibilities of a radiation oncologist before the clerkship, 22 (84.6%) students agreed and 3 (11.5%) strongly agreed that they understood the daily responsibilities of a radiation oncologist after the clerkship (P < .0001). Although 15 students (57.7%) reported an increased interest in radiation oncology because of the clerkship, the mean level of interest in radiation oncology as a career remained the same, with pre- and post-clerkship scores of 3.0 (±0.9) and 3.0 (±1.1) on a 5-point scale, respectively (P = .7). Students found virtual clinic and didactic lectures to be the most valuable components of the clerkship. Most respondents agreed (30.8%) or strongly agreed (65.4%) to recommend the clerkship to their classmates.CONCLUSIONS: Our virtual clerkship was effective in increasing medical student interest in and knowledge about radiation oncology. These data will help optimize a new paradigm of virtual radiation oncology education for medical students during COVID-19 and beyond.

    View details for DOI 10.1016/j.ijrobp.2020.06.050

    View details for PubMedID 32890529

  • Local control and toxicity outcomes of stereotactic radiosurgery for spinal metastases of gastrointestinal origin. Journal of neurosurgery. Spine Sandhu, N. n., Benson, K. R., Kumar, K. A., Eyben, R. V., Chang, D. T., Gibbs, I. C., Hancock, S. L., Meola, A. n., Chang, S. D., Li, G. n., Hayden-Gephart, M. n., Soltys, S. G., Pollom, E. L. 2020: 1–8


    Colorectal cancer (CRC) and other gastrointestinal (GI) cancers are believed to have greater radioresistance than other histologies. The authors report local control and toxicity outcomes of stereotactic radiosurgery (SRS) to spinal metastases from GI primary cancers.A retrospective single-center review was conducted of patients with spinal metastases from GI primary cancers treated with SRS from 2004 to 2017. Patient demographics and lesion characteristics were summarized using medians, interquartile ranges (IQRs), and proportions. Local failure (LF) was estimated using the cumulative incidence function adjusted for the competing risk of death and compared using Gray's test for equality. Multivariable analyses were conducted using Cox proportional hazard models, adjusting for death as a competing risk, on a per-lesion basis. Patients were stratified in the Cox model to account for repeated measures for clustered outcomes. Median survival was calculated using the Kaplan-Meier method.A total of 74 patients with 114 spine lesions were included in our analysis. The median age of the cohort was 62 years (IQR 53-70 years). Histologies included CRC (46%), hepatocellular carcinoma (19%), neuroendocrine carcinoma (13%), pancreatic carcinoma (12%), and other (10%). The 1- and 2-year cumulative incidence rates of LF were 24% (95% confidence interval [CI] 16%-33%) and 32% (95% CI 23%-42%), respectively. Univariable analysis revealed that older age (p = 0.015), right-sided primary CRCs (p = 0.038), and single fraction equivalent dose (SFED; α/β = 10) < 20 Gy (p = 0.004) were associated with higher rates of LF. The 1-year cumulative incidence rates of LF for SFED < 20 Gy10 versus SFED ≥ 20 Gy10 were 35% and 7%, respectively. After controlling for gross tumor volume and prior radiation therapy to the lesion, SFED < 20 Gy10 remained independently associated with worse LF (hazard ratio 2.92, 95% CI 1.24-6.89, p = 0.014). Toxicities were minimal, with pain flare observed in 6 patients (8%) and 15 vertebral compression fractures (13%).Spinal metastases from GI primary cancers have high rates of LF with SRS at a lower dose. This study found that SRS dose is a significant predictor of failure and that prescribed SFED ≥ 20 Gy10 (biological equivalent dose ≥ 60 Gy10) is associated with superior local control.

    View details for DOI 10.3171/2020.1.SPINE191260

    View details for PubMedID 32114530

  • Stereotactic Radiosurgery After Resection of Brain Metastases: Changing Patterns of Care in the United States. World neurosurgery Chin, A. L., Li, G. n., Gephart, M. H., Sandhu, N. n., Nagpal, S. n., Soltys, S. G., Pollom, E. L. 2020


    Management of symptomatic brain metastases often includes surgical resection with postoperative radiotherapy. Postoperative whole brain radiotherapy (WBRT) improves intracranial control but detrimentally impacts quality of life and neurocognition. We sought to characterize the use in the United States of postoperative stereotactic radiosurgery (SRS), an evolving standard-of-care associated with reduced cognitive effects.With the MarketScan Commercial Claims and Encounters Database from 2007 to 2015, we identified patients aged 18-65 years treated with resection of a brain metastasis followed by SRS or WBRT within 60 days of surgery. Logistic regression estimated associations between co-variables (treatment year, age, sex, geographic region, place of service, insurance type, disease histology, comorbidity score, and median area household income and educational attainment) and SRS receipt.Of 4,007 patients included, 1,506 (37.6%) received SRS and 2,501 (62.4%) received WBRT. Postoperative SRS increased from 16.5% (2007-2008) to 56.8% (2014-2015). Patients residing in areas with a median household income or an educational attainment below 50th percentile were significantly less likely to receive SRS after controlling for treatment year and other demographic characteristics (p<0.01). Factors associated with higher odds of receiving SRS included younger age, female sex, melanoma histology, Western region location, hospital-based facility, and high-deductible health plan enrollment (p<0.05 for each).Postoperative SRS for brain metastases has increased from 2007 to 2015, with the majority of patients now receiving SRS over WBRT. Patients in areas of lower socioeconomic class were less likely to receive SRS, warranting further investigation of barriers to SRS adoption.

    View details for DOI 10.1016/j.wneu.2020.09.085

    View details for PubMedID 32971279

  • Stereotactic radiosurgery for resected brain metastases: Does the surgical corridor need to be treated? Shi, S., Jaoude, J., Sandhu, N., Wang, E., Schofield, K., Jin, M. C., Zhang, C., Liu, E., Pollom, E. L., Soltys, S. G. AMER SOC CLINICAL ONCOLOGY. 2019
  • Outcomes and Characteristics of Patients Treated with Emergent Palliative Radiation Therapy PRACTICAL RADIATION ONCOLOGY Grade, M., Koenig, J., Qian, Y., Sandhu, N., Liu, Y., Turner, B., von Eyben, R., Knox, S., Dudley, S. 2019; 9 (2): E203–E209
  • Stereotactic radiosurgery for resected brain metastases: single-institutional experience of over 500 cavities. International journal of radiation oncology, biology, physics Shi, S. n., Sandhu, N. n., Jin, M. C., Wang, E. n., Jaoude, J. A., Schofield, K. n., Zhang, C. n., Liu, E. n., Gibbs, I. C., Hancock, S. L., Chang, S. D., Li, G. n., Hayden-Gephart, M. n., Adler, J. R., Soltys, S. G., Pollom, E. L. 2019


    Post-operative stereotactic radiosurgery (SRS) has less detrimental impact on cognition and quality of life compared to whole brain radiotherapy (WBRT) and is increasingly used for resected brain metastases (BMs). Post-operative SRS techniques are not standardized, and there is a concern for a different pattern of failure following post-operative SRS compared to WBRT. We aim to study the efficacy, toxicity, and failure pattern of post-operative SRS.We retrospectively reviewed outcomes of patients with resected BMs treated with post-operative SRS between 2007 and 2018. Overall survival (OS) and cumulative incidences of local failure (LF), overall distant intracranial failure [distant parenchymal failure (DPF), nodular leptomeningeal disease (nLMD), classical leptomeningeal disease (cLMD)], and adverse radiation effect (ARE) were reported. Neurological death was determined for patients with leptomeningeal disease (LMD).A total of 442 patients with 501 resected BMs were treated over 475 total SRS courses. Median clinical follow-up and OS after SRS were 10.1 months [interquartile range (IQR) 3.6-20.7 months] and 13.9 months [95% confidence interval (CI) 11.8-15.2 months], respectively. At 12 months, event rates were 7% (95% CI 5%-10%) for LF, 9% (95% CI 7%-12%) for ARE, 44% (95% CI 40%-49%) for overall distant intracranial failure, 37% (95% CI 33%-42%) for DPF and 13% (95% CI 10%-17%) for LMD. The overall incidence of LMD was 15.8% (53% cLMD, 46% nLMD). cLMD was associated with shorter survival than nLMD (2.0 versus 11.2 months, p<0.01) and a higher proportion of neurological death (67% versus 41%, p=0.02). A total of 15% of patients ultimately received WBRT.We report the largest clinical experience of post-operative SRS for resected BMs, showing excellent local control and low toxicity. Intracranial failure was predominantly distant, with a rising incidence of LMD.

    View details for DOI 10.1016/j.ijrobp.2019.11.022

    View details for PubMedID 31785338

  • Results from a Phase 1 Study of Sodium Selenite in Combination with Palliative Radiation Therapy in Patients with Metastatic Cancer. Translational oncology Knox, S. J., Jayachandran, P. n., Keeling, C. A., Stevens, K. J., Sandhu, N. n., Stamps-DeAnda, S. L., Savic, R. n., Shura, L. n., Buyyounouski, M. K., Grimes, K. n. 2019; 12 (11): 1525–31


    In preclinical studies, selenite had single agent activity and radiosensitized tumors in vivo. Here we report results from a Phase 1 trial in 15 patients with metastatic cancer treated with selenite (5.5 to 49.5 mg) orally as a single dose 2 hours before each radiation therapy (RT) treatment. Patients received RT regimens that were standard of care. The primary objective of the study was to assess the safety of this combination therapy. Secondary objectives included measurement of pharmacokinetics (PK) and evaluation of efficacy. Endpoints included assessment of PK, toxicity, tumor response, and pain before and after treatment. The half-life of selenite was 18.5 hours. There were no adverse events attributable to selenite until the 33 mg dose level, at which the primary toxicities were grade 1 GI side effects. One patient treated with 49.5 mg had grade 2 GI toxicity. Although this was not a DLT, it was felt that the highest acceptable dose in this patient population was 33 mg. Most patients had stabilization of disease within the RT fields, with some demonstrating objective evidence of tumor regression. Most patients had a marked improvement in pain and seven out of nine patients with prostate cancer had a decrease in PSA ranging from 11-78%. Doses up to 33 mg selenite were well tolerated in combination with RT. A randomized, well controlled study is needed at the 33 mg dose level to determine if selenite results in clinically meaningful improvements in the response to palliative RT.

    View details for DOI 10.1016/j.tranon.2019.08.006

    View details for PubMedID 31454725

  • Outcomes and characteristics of patients treated with emergent palliative radiotherapy. Practical radiation oncology Grade, M., Koenig, J., Qian, Y., Sandhu, N., Liu, Y., Turner, B., von Eyben, R., Knox, S., Dudley, S. 2018


    PURPOSE: Emergent palliative radiotherapy of symptomatic metastases can significantly increase quality of life for cancer patients. While in some contexts this treatment may be underutilized, in others it may represent excessively aggressive intervention. Characterization of the current use of emergent palliative radiotherapy is warranted for optimized value and patient-centered care.METHODS AND MATERIALS: This study is a cross-sectional retrospective analysis of all emergent palliative radiotherapy courses at a single academic tertiary institution across one year.RESULTS: 214 patients received a total of 238 treatment courses. The most common indications were bone (39%) and brain (14%) metastases. Compared to outpatients, inpatients had lower mean survival (2 months vs 6 months, p<0.001), higher rates of stopping treatment early (19.1% vs 9.0%; p=0.034), and greater involvement of palliative care (44.8% vs 24.1%, p<0.001), but the same mean planned fractions (9.10 vs 9.40 fractions, p=0.669). In a multiple predictor survival analysis, palliative care involvement (p=0.025), male sex (p=0.001), ending treatment early (p=0.011), and having one of three serious indications (airway compromise, leptomeningeal disease, and IVC/SVC involvement) (p=0.007) were significantly associated with worse overall survival.CONCLUSIONS: Survival is particularly poor in patients receiving emergent palliative radiotherapy, and patient characteristics such as functional status and indication should be considered when determining fractionation schedule and dosing. Multi-institutional study of practice patterns and outcomes is warranted.

    View details for PubMedID 30529795

  • Prefrontal and Hippocampal Brain Volume Deficits: Role of Low Physical Activity on Brain Plasticity in First-Episode Schizophrenia Patients JOURNAL OF THE INTERNATIONAL NEUROPSYCHOLOGICAL SOCIETY McEwen, S. C., Hardy, A., Ellingson, B. M., Jarrahi, B., Sandhu, N., Subotnik, K. L., Ventura, J., Nuechterlein, K. H. 2015; 21 (10): 868-879


    Our objective in the present study was to conduct the first empirical study of the effects of regular physical activity habits and their relationship with brain volume and cortical thickness in patients in the early phase of schizophrenia. Relationships between larger brain volumes and higher physical activity levels have been reported in samples of healthy and aging populations, but have never been explored in first-episode schizophrenia patients.We collected MRI structural scans in 14 first-episode schizophrenia patients with either self-reported low or high physical activity levels. We found a reduction in total gray matter volume, prefrontal cortex (PFC), and hippocampal gray matter volumes in the low physical activity group compared to the high activity group. Cortical thickness in the dorsolateral and orbitofrontal PFC were also significantly reduced in the low physical activity group compared to the high activity group. In the combined sample, greater overall physical activity levels showed a non-significant tendency with better performance on tests of verbal memory and social cognition. Together these pilot study findings suggest that greater amounts of physical activity may have a positive influence on brain health and cognition in first-episode schizophrenia patients and support the implementation of physical exercise interventions in this patient population to improve brain plasticity and cognitive functioning.

    View details for DOI 10.1017/S1355617715000983

    View details for Web of Science ID 000365731000013

    View details for PubMedID 26581798

    View details for PubMedCentralID PMC4654705