R adiologists play a pivotal role in cancer care through imaging for the purposes of screening, diagnosis, treatment planning, and surveillance. Additionally, image-guided tissue biopsies performed by radiologists allow for more specific diagnosis and the ability to molecularly characterize tumor cells. Radiologists are also involved in cancer treatment as interventional radiologists deliver minimally invasive local-regional therapies and nuclear medicine physicians administer radionuclide therapy. As discussed by Hricak (1), there are many exciting developing advancements in the field of radiology in the context of precision oncology. Although characterizing physiologic and molecular features of tumors through imaging has traditionally been limited to enhancement characteristics and metabolism, deeper tumor characterization is now possible through molecular imaging for treatment selection, dose finding, and data acquisition on tumor metabolism through nuclear medicine and MR spectroscopy. These innovations, combined with the integration of artificial intelligence and the emerging fields of theranostics and radiomics, are just a few of the ways that radiologists are expanding their contributions and adding value to the care of the patient with cancer (1,2).The emergence of precision medicine and personalized cancer treatment based on genetic analysis of tumor tissue over the past few decades has resulted in more specific treatment options. While tumor cell receptors, driver mutations, and treatment-susceptible alterations allow for tailored treatment selection, cancers continue to adapt through genetic and epigenetic alterations and acquire resistance to therapy (3). Intratumor heterogeneity
Type II endoleak is a common complication following endovascular aortic aneurysm repair and can lead to an increased risk of aneurysmal expansion and rupture. The most frequently employed strategies to treat Type II endoleak involves catheterization of the branch vessels responsible for the endoleak or accessing the aneurysm sac through a percutaneous approach. An endovascular transcaval approach for embolization of the aneurysmal sac provides an alternate strategy with comparable success rates. This technique is advantageous when the endoleak is predominantly on the right side of the aneurysm sac and/or when a direct access to the aneurysm sac through a percutaneous approach is not feasible.
Objective: Over the last 2 decades, there has been an exponential rise in placement of retrievable inferior vena cava (IVC) filters, while the retrieval rate has remained steadily low. Approaches to increasing filter retrieval rates have been extensively studied. Conclusion: This review presents an up-to-date review of reported data-driven variables that affect retrieval rates of IVC filters, with a focus on clinical, technical, and process factors.
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