1,531 results match your criteria: "Gray Institute for Radiation Oncology & Biology[Affiliation]"

Objective: To identify clinicopathologic and genomic features associated with brain metastasis after resection of lung adenocarcinoma (LUAD) and to evaluate survival after brain metastasis.

Methods: Patients who underwent complete resection of stage I-IIIA LUAD between 2011 and 2020 were included. A subset of patients had broad-based panel next-generation sequencing performed on their tumors.

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Diffusion-Weighted MRI and Human Papillomavirus (HPV) Status in Oropharyngeal Cancer.

Cancers (Basel)

December 2024

Laboratory of Experimental Radiotherapy, Department of Oncology, University of Leuven, 3000 Leuven, Belgium.

Background: This study aimed to explore the differences in quantitative diffusion-weighted (DW) MRI parameters in oropharyngeal squamous cell carcinoma (OPC) based on Human Papillomavirus (HPV) status before and during radiotherapy (RT).

Methods: Echo planar DW sequences acquired before and during (chemo)radiotherapy (CRT) of 178 patients with histologically proven OPC were prospectively analyzed. The volumetric region of interest (ROI) was manually drawn on the apparent diffusion coefficient (ADC) map, and 105 DW-MRI radiomic parameters were extracted.

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Osimertinib is first-line treatment for epidermal growth factor (EGFR)-mutated non-small cell lung cancer (NSCLC) and has been associated with cardiotoxicity. However, the nature of cardiac remodeling and associated risk factors remains incompletely understood. Retrospective analysis of NSCLC patients with ≥1 echocardiogram post-osimertinib between 2007 and 2022 was performed.

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Background: Cancer remains a critical global health issue requiring a comprehensive interdisciplinary approach for effective treatment. Interprofessional education (IPE) is essential for overcoming barriers to collaboration among healthcare professionals and fostering efficient teamwork in cancer care.

Objective: This systematic scoping review aims to explore the role of IPE in enhancing interprofessional collaboration within cancer care by mapping and synthesizing the implementation, impact, and evaluation strategies of patient-centered IPE programs in this field.

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KRAS is the most frequently mutated oncogene in lung adenocarcinoma, with G12C and G12V being the most predominant forms. Recent breakthroughs in KRASG12C inhibitors have transformed the clinical management of patients with G12C mutation and advanced our understanding of its function. However, little is known about the targeted disruption of KRASG12V, partly due to a lack of specific inhibitors.

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Article Synopsis
  • The study assesses real-world outcomes and failure patterns in patients with muscle-invasive bladder cancer (MIBC) who underwent trimodality therapy (TMT) between 2000 and 2018, utilizing data from the Veterans Affairs database.
  • Results indicate that out of 347 patients treated with TMT, 44% had no recurrence, while 37% experienced metastatic recurrence (MR) and 34% had local recurrence (LR), highlighting significant rates of recurrence within the patient population.
  • The findings suggest that TMT is generally effective in treating MIBC, but the high recurrence rates, particularly with lymph node positive disease and pre-treatment hydronephrosis, stress the importance of ongoing patient monitoring and the exploration of better treatment strategies
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Background: Many patients with head and neck cancer are not candidates for standard of care definitive treatments though often require palliative treatments given the frequent symptoms associated with head and neck cancer. While existing palliative radiotherapy regimens can provide adequate symptom control, they have limitations particularly with respect to local control which is becoming more important as advances in systemic therapy are improving survival. Personalized ultrafractionated stereotactic adaptive radiotherapy (PULSAR) is a novel radiotherapy regimen which leverages advances in radiotherapy treatment technology and extended interfraction intervals to enable adaptive radiotherapy and possible synergy with the immune system.

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Dose-volume predictors of cardiac adverse events after high-dose thoracic radiation therapy for lung cancer: a systematic review and meta-analysis.

BMC Cancer

December 2024

Department of Biomedical Sciences, Namur Research Institute for Life Sciences, (NARILIS), Faculty of Medicine, University of Namur, Namur, Belgium.

Background: Lung cancer is a leading cause of cancer mortality and may require high-dose thoracic radiation therapy (RT). However, RT significantly increases the risk of radiation-induced cardiac events, such as pericarditis, cardiomyopathy, and ischemic heart diseases. Despite evidence from clinical trials showing that higher RT doses are associated with poorer survival outcomes due to these cardiac effects, data on dose-volume predictors of such events in lung cancer remain sparse.

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Purpose: This study aims to investigate the prognostic impact of ground-glass opacity (GGO)-component in early-stage lung cancer patients treated with stereotactic body radiotherapy (SBRT).

Methods: From January 2013 to December 2022, 239 early-stage lung cancer patients (T1-2N0M0) underwent SBRT. They were categorized into two groups based on the presence of GGO-component: 65 patients in the subsolid group with a consolidation tumor ratio (CTR) between 0.

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Purpose: To predict distant metastasis (DM) in patients with borderline resectable pancreatic carcinoma using delta-radiomics features calculated from contrast-enhanced computed tomography (CECT) and non-CECT images.

Methods And Materials: Among 250 patients who underwent radiation therapy at our institution between February 2013 and December 2021, 67 patients were deemed eligible. A total of 11 clinical features and 3906 radiomics features were incorporated.

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Recent studies report excellent local control (LC) and favorable toxicities of stereotactic ablative radiotherapy (SABR) for pulmonary metastasis (PM) from sarcoma. This study compared the LC and survival of SABR and metastasectomy for sarcoma PM. We analyzed the LC rates of 54 PMs treated with SABR between 2008 and 2022.

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Weekly Cisplatin Cycles and Outcomes for Chemoradiation in Head and Neck Cancer.

JAMA Netw Open

December 2024

Department of Radiation Oncology, The Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, The Ohio State University Comprehensive Cancer Center, Columbus.

Importance: National Comprehensive Cancer Network guidelines recommend weekly cisplatin as an alternative concurrent systemic therapy for definitive chemoradiation in patients with head and neck cancer. However, the impact of different levels of adherence to weekly cisplatin on outcomes stratified by human papillomavirus p16 status remains unclear.

Objective: To evaluate the association between the number of weekly cisplatin cycles and outcomes.

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In cancer patients, physical and psychological issues are very common. There is a need for family support and high utilisation of healthcare resources commonly. Palliative care (PC) has grown in popularity to better fulfil of needs of patients and their families and potentially lowering hospital costs.

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Introduction: Triple-negative breast cancer (TNBC) is an aggressive breast cancer (BC) subtype with higher incidence and mortality rates in non-Hispanic Black (NHB) women than non-Hispanic Whites. Studies assessing disparities between NHB and Hispanic women, the two largest US racial/ethnic minorities, are lacking. This study evaluates disparities in the treatment and outcomes between NHB and Hispanic women with non-metastatic TNBC.

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Introduction: Recently, the ASCO and ESMO guidelines on salivary gland carcinomas (SGCs) have been released. However, several crucial points lack strong recommendations due to low or intermediate quality of evidence. To better address these "grey zones" in the guidelines, we conducted a survey among the European Organization for Research and Treatment of Cancer (EORTC) Head and Neck Cancer Group (HNCG) members on behalf of the EORTC young and early career investigators.

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The association of HIV status with triple-negative breast cancer in patients with breast cancer in South Africa: a cross-sectional analysis of case-only data from a prospective cohort study.

Lancet Glob Health

December 2024

Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA; Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, USA. Electronic address:

Background: Breast cancer is the most common malignancy diagnosed among women in South Africa, with the aggressive triple-negative subtype comprising approximately 15% of breast cancers in this population. South Africa has the largest population of people with HIV in the world. This study aims to evaluate the association between HIV status and the proportion of patients with breast cancer with the triple-negative subtype.

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Variable-flip-angle 3D spiral-in-out turbo spin-echo imaging using concomitant gradient compensation and echo reordering at 0.55 T.

Magn Reson Med

November 2024

Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA.

Article Synopsis
  • Developed a single-slab 3D spiral turbo spin echo (spiral SPACE) imaging technique for 1-mm isotropic whole-brain T-weighted imaging using a 0.55T scanner focused on high scan efficiency.
  • Implemented methods included gradient infidelity correction, phase error compensation during readouts, and adjusted RF pulses to achieve enhanced echo trains, leading to improved image quality.
  • Results indicated a 15%-25% improvement in signal-to-noise ratio (SNR) for spiral SPACE over Cartesian SPACE, showing reduced artifacts and blurring in tested subjects.
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Dosimetric and biological impact of activity extravasation of radiopharmaceuticals in PET imaging.

Med Phys

November 2024

Advanced Computing for Health Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA.

Article Synopsis
  • The study focuses on understanding radiotracer extravasation in PET imaging, an area that hasn't been thoroughly examined but could improve clinical practices.
  • It aims to quantify the absorbed radiation doses from extravasation both at the injection site and its effects on nearby organs, while also exploring the biological effects at the cellular level.
  • Utilizing advanced simulations, including GATE and TOPAS-nBio, the researchers modeled a common PET scan scenario to calculate radiation doses and assess potential DNA damage from radiation exposure within affected cells.
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Prognostic value of gray-white matter ratio measured by brain MRI-based CT structures in comatose patients after cardiac arrest.

Am J Emerg Med

January 2025

Department of Emergency Medicine, Chung-Ang University Gwangmyeong Hospital, College of Medicine, Seoul, Chung-Ang University, 110, Deokan-ro, Gwangmyeong-si, Gyeonggi-do, Republic of Korea. Electronic address:

Background: Post-cardiac arrest care advancements have improved resuscitation outcomes, but many survivors still face severe neurological deficits or death from brain injury. Herein, we propose a consistent prognosis prediction approach using magnetic resonance imaging (MRI) to analyze anatomical regions represented by the gray and white matter, and subsequently apply it on computed tomography (CT) to calculate the gray-white matter ratio (GWR). We compared this novel method with traditional measures to validate its ability to predict the prognosis of patients resuscitated after cardiac arrest.

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Prior information guided deep-learning model for tumor bed segmentation in breast cancer radiotherapy.

BMC Med Imaging

November 2024

Department of Radiation Oncology, Clinical Oncology School of Fujian Medical University, Fujian Cancer Hospital, Fuzhou, 350014, China.

Article Synopsis
  • Identifying the tumor bed (TB) after surgical removal of a tumor is essential for effective radiotherapy planning, but segmenting it from surrounding tissues using CT images poses significant challenges.
  • A new deep learning model enhances the delineation of TB by using prior tumor location information from both pre-operative and post-operative CT scans, improving accuracy in identifying treatment volumes.
  • The model demonstrated a significant improvement in segmenting TB, achieving a higher dice similarity coefficient compared to traditional methods and models without prior information, indicating better performance in clinical applications.
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Activating p53 with a Mutant-Specific Small Molecule.

bioRxiv

October 2024

Department of Chemical and Systems Biology, ChEM-H, and Stanford Cancer Institute, Stanford School of Medicine, Stanford University, Stanford, CA, USA.

is the most commonly mutated gene in cancer, but it remains recalcitrant to clinically meaningful therapeutic reactivation. We present here the discovery and characterization of a small molecule chemical inducer of proximity that activates mutant p53. We named this compound TRanscriptional Activator of p53 () due to its ability to engage mutant p53 and BRD4 in a ternary complex, which potently activates mutant p53 and triggers robust p53 target gene transcription.

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Article Synopsis
  • Dynamic glucose enhanced (DGE) MRI, using techniques like CEST or CESL, aims to analyze glucose uptake but faces challenges with low sensitivity and motion artifacts.
  • The new method proposed, called DS-DGE MRI, leverages linewidth broadening in water saturation spectra during glucose infusion to improve measurements.
  • Initial tests on brain tumor patients show that DS-DGE MRI produces detailed area-under-the-curve maps that effectively highlight tumor regions, indicating its potential over existing imaging techniques.
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Background And Objective: This systematic literature review addresses model-based cost-effectiveness studies for therapy response monitoring with positron emission tomography (PET) generally combined with low-dose computed tomography (CT) for various cancer types. Given the known heterogeneity in therapy response events, studies should consider patient-level modelling rather than cohort-based modelling because of its flexibility in handling these events and the time to events. This review aims to identify the modelling methods used and includes a systematic assessment of the assumptions made in the current literature.

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Introduction: We performed a retrospective analysis of patients with multiple myeloma (MM) receiving palliative radiotherapy (RT) and assessed factors associated with local control, with a focus on dose/fractionation and cytogenetics.

Materials And Methods: We included patients who received palliative RT for MM at our institution. Cytogenetics were collected via fluorescence in situ hybridization.

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