177 Review Article Tumor thrombus: incidence, imaging, prognosis and treatment Keith Bertram Quencer1, Tamir Friedman2, Rahul Sheth3, Rahmi Oklu4 1Department of Radiology, University of Utah, Salt Lake City, UT, USA; 2Division of Interventional Radiology, Department of Radiology, Cornell University, New York, NY, USA; 3Division of Interventional Radiology, Department of Radiology, MD Anderson Cancer, Houston, TX, USA; 4Division of Interventional Radiology, Department of Radiology, Mayo Clinic-Arizona, Phoenix, AZ, USA Contributions: (I) Conception and design: R Oklu, KB Quencer, T Friedman; (II) Administrative support: KB Quencer, R Oklu, R Sheth; (III) Provision of study material or patients: None; (IV) Collection and assembly of data: None; (V) Data analysis and interpretation: None; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors. Correspondence to: Keith Bertram Quencer, MD. Department of Radiology, University of Utah, Salt Lake City, UT, USA. Email:
[email protected]. Abstract: Intravascular tumor extension, also known as tumor thrombus, can occur in many different types of cancer. Those with the highest proclivity include Wilm’s tumor, renal cell carcinoma (RCC), adrenal cortical carcinoma (ACC) and hepatocellular carcinoma (HCC). The presence of tumor thrombus markedly worsens prognosis and impacts treatment approach. Imaging plays a key role in its diagnosis. Endovascular methods also play a large role in treatment. Keywords: Tumor thrombus; renal cell carcinoma (RCC); hepatocellular carcinoma (HCC) Submitted Jul 07, 2017. Accepted for publication Sep 12, 2017. doi: 10.21037/cdt.2017.09.16 View this article at: http://dx.doi.org/10.21037/cdt.2017.09.16 Introduction Intravascular tumor thrombus is defined as tumor extension into a vessel.