Most retroperitoneal tumors such as renal cell carcinoma have been associated with tumor thrombus extending into the renal vein. inferior vena cava (IVC). and heart. The retroperitoneal metastatic potential of testicular tumors is well known. https://www.jmannino.com/deal-alert-Sink-Front-Polymer-Tip-Out-Trays-with-Hinges-flash-find/