Renal cell carcinoma extending into the vena cava: surgical approach, technique and results.

Objective: To describe the technique and results of a thoraco-abdominal approach to removing the caval thombi in patients with renal cell carcinoma extending into the vena cava.

Patients And Methods: Between 1970 and 1990 35 patients presenting with renal cell carcinoma extending into the vena cava were treated at the Department of Urology, Innsbruck. Twenty-three of these patients underwent radical tumour nephrectomy including cavotomy and thrombectomy or caval resection. A transabdominal approach had been used in this department for radical tumour nephrectomy including cavotomy and thrombectomy or caval resection until 1987. Since 1988, a thoraco-abdominal approach has been employed. In group I patients the approach was via the seventh intercostal space, whereas in group II and III patients the thoraco-abdominal incision was made through the fifth intercostal space. In the present study the anatomy of the thoraco-abdominal approach is described.

Results: Tumour staging and grading yielded stage T3b in 15 patients (grade I, 1; grade II, 6; grade III, 8); another eight patients with stage T3b were found to have metastatic disease (N1, 6; N2, 2; M1, 3). On the basis of the extension of the caval thrombus the patients were classified as follows: group I, 16; group II, 3; group III, 4. In T3b N0 M0 patients the 5-year-survival rate was 62.5%, while in patients with positive lymph nodes the mean survival rate was 15.5 months.

Conclusion: Our results suggest that the thoracoa-abdominal approach is the method of choice for the safe removal of renal cell carcinomas associated with caval thombi. If resection of the caval tumour is complete, prognosis is dependent on known factors, such as tumour invasion, nodal involvement and distant metastases rather than the extension of the tumour thrombus. An aggressive approach is not warranted in patients with nodal involvement and/or distant metastases, as it does not improve survival.