Prophylactic Stenting of the Inferior Vena Cava before Transcatheter Embolization of Renal Cell Carcinomas: An Alternative to Filter Placement

Purpose:To report the use of the self-expanding Wallstent as an alternative to prophylactic inferior vena cava (IVC) filter placement before embolization of renal carcinomas with tumor thrombus.Case Reports:Two patients, a 71-year-old man and an 88-year-old woman, were diagnosed with extensive tumor infiltration of the IVC secondary to renal cell carcinomas. Prophylactic placement of an IVC filter before transcatheter embolization was unsuccessful in both cases; a reduced space for deployment would have left part of the filter inside the right atrium. Instead, a Wallstent was used to constrain the tumor thrombus against the vessel wall and, at the same time, protect the patency of the contralateral kidney. Adequate patencies were confirmed 9 months after stenting in the first patient and after 19 days in the second patient. There were no clinical manifestations of pulmonary embolism.Conclusions:Wallstent implantation is an alternative prophylactic measure before transarterial embolization of renal carcino...