Surgical treatment of renal neoplasmatic thrombi extending into the inferior vena cava.

Renal cell carcinoma produces neoplasmatic thrombus that usually invades and progressively grows into the endorenal veins. The thrombus may extend into the ipsilateral renal vein or the inferior vena cava in 15-20% and 8-15% of cases, respectively. These tumors are classified into four categories (I, II, III, and IV) according to the level of cephalad extension of thrombus into the inferior vena cava. The purpose of this study was to assess the surgical strategy for cases of renal tumor thrombus invading the vena cava. We retrospectively reviewed the records of 10 patients with renal cell carcinoma, who underwent in our institution radical nephrectomy and resection of vena cava thrombus between January 1997 and December 2004. Four patients were classified as level I, four were level II, and two were level III. In all cases, the thrombus was removed through a small cavotomy without cardiopulmonary bypass and the cavotomy was closed primarily. Pringle's maneuver was performed in the two level III cases. There were no perioperative pulmonary embolisms or deaths, and the mean hospital stay was 8 +/- 1.1 days. The mean survival was 21.8 +/- 8 months, and the vena cava remained patent for this period. Tumor thrombectomy improves the prognosis and the quality of life of these patients, and in most of cases the surgical technique, although challenging, carries a low morbidity and mortality rate.