AI Article Synopsis
Article Abstract
Introduction: Linac-based stereotactic radiosurgery (SRS) for brain metastases may be influenced by the time interval between treatment preparation and delivery, related to risk of anatomical changes. We studied tumor position shifts and its relations to peritumoral volume edema changes over time, as seen on MRI.
Methods: Twenty-six patients who underwent SRS for brain metastases in our institution were included. We evaluated the occurrence of a tumor shift between the diagnostic MRI and radiotherapy planning MRI. For 42 brain metastases the tumor and peritumoral edema were delineated on the contrast enhanced T1weighted and FLAIR images of both the diagnostic MRI and planning MRI examinations. Centre of Mass (CoM) shifts and tumor borders were evaluated. We evaluated the influence of steroids on peritumoral edema and tumor volume and the correlation with CoM and tumor border changes.
Results: The median values of the CoM shifts and of the maximum distances between the tumor borders obtained from the diagnostic MRI and radiotherapy planning MRI were 1.3 mm (maximum shift of 5.0 mm) and 1.9 mm (maximum distance of 7.4 mm), respectively. We found significant correlations between the absolute change in edema volume and the tumor shift of the CoM ( < 0.001) and tumor border ( = 0.040). Patients who received steroids did not only had a decrease in peritumoral edema, but also had a median decrease in tumor volume of 0.02 cc while patients who did not receive steroids had a median increase of 0.06 cc in tumor volume ( = 0.035).
Conclusion: Our results show that large tumor shifts of brain metastases can occur over time. Because shifts may have a significant impact on the local dose coverage, we recommend minimizing the time between treatment preparation and delivery for Linac based SRS.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5893526 | PMC |
| http://dx.doi.org/10.1016/j.ctro.2016.12.007 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Cancer vaccines: an update on recent achievements and prospects for cancer therapy.
Clin Exp Med
December 2024
Department of Virology, National Institute of Public Health NIH-National Research Institute, Warsaw, Poland.
Decades of basic and translational research have led to a momentum shift in dissecting the relationship between immune cells and cancer. This culminated in the emergence of breakthrough immunotherapies that paved the way for oncologists to manage certain hard-to-treat cancers. The application of high-throughput techniques of genomics, transcriptomics, and proteomics was conclusive in making and expediting the manufacturing process of cancer vaccines.
View Article and Find Full Text PDFFirst-principles simulations of the fluorescence modulation of a COX-2-specific fluorogenic probe upon protein dimerization for cancer discrimination.
Protein Sci
January 2025
Departament de Química, Universitat Autònoma de Barcelona, Barcelona, Spain.
Cyclooxygenase-2 (COX-2) plays a crucial role in inflammation and has been implicated in cancer development. Understanding the behavior of COX-2 in different cellular contexts is essential for developing targeted therapeutic strategies. In this study, we investigate the fluorescence spectrum of a fluorogenic probe, NANQ-IMC6, when bound to the active site of human COX-2 in both its monomeric and homodimeric forms.
View Article and Find Full Text PDFGeneral access to furan-substituted -difluoroalkenes enabled by PFTB-promoted cross-coupling of ene-yne-ketones and difluorocarbene.
Chem Sci
December 2024
Department of Spine Surgery and Musculoskeletal Tumor, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University Wuhan 430071 China
Replacement of a carbonyl group with fluorinated bioisostere (, CF[double bond, length as m-dash]C) has been adopted as a key tactical strategy in drug design and development, which typically improves potency and modulates lipophilicity while maintaining biological activity. Consequently, new -difluoroalkenation reactions have undoubtedly accelerated this shift, and conceptually innovative practices would be of great benefit to medicinal chemists. Here we describe an expeditous protocol for the direct assembly of furan-substituted -difluoroalkenes PFTB-promoted cross-coupling of ene-yne-ketones and difluorocarbene.
View Article and Find Full Text PDFLuteinizing hormone-releasing hormone receptor agonists and antagonists in prostate cancer: effects on long-term survival and combined therapy with next-generation hormonal agents.
Cancer Biol Med
December 2024
Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu 610041, China.
Prostate cancer is a leading cause of cancer-related death in men worldwide. Luteinizing hormone-releasing hormone receptor (LHRH-R) agonists and antagonists are known to achieve castration-level testosterone suppression; however, long-term data comparing the survival benefits of these therapies are insufficient to inform treatment decisions. Furthermore, the advent of next-generation hormonal agents (NHAs), such as abiraterone and enzalutamide, have shifted the paradigm of managing prostate cancer.
View Article and Find Full Text PDFBibliometric and visual analysis of human microbiome-breast cancer interactions: current insights and future directions.
Front Microbiol
December 2024
Department of Breast Surgery and Institutes for Systems Genetics, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Sichuan, China.
The composition of the gut microbiome differs from that of healthy individuals and is closely linked to the progression and development of breast cancer. Recent studies have increasingly examined the relationship between microbial communities and breast cancer. This study analyzed the research landscape of microbiome and breast cancer, focusing on 736 qualified publications from the Web of Science Core Collection (WoSCC).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!