Risk Score and Metastasectomy Independently Impact Prognosis of Patients With Recurrent Renal Cell Carcinoma

PurposeWe evaluated the prognostic roles of metastasectomy and an established risk stratification system in patients with disease recurrence following nephrectomy for nonmetastatic renal cell carcinoma.Materials and MethodsA retrospective analysis was performed in 129 patients with localized renal cell carcinoma treated with partial or radical nephrectomy and subsequently diagnosed with disease recurrence. At recurrence a previously validated risk score based on Karnofsky performance status, interval from nephrectomy, and serum hemoglobin, calcium and lactate dehydrogenase was used to categorize patients as being at favorable, intermediate or poor risk. Survival from time of recurrence was assessed based on risk categorization and metastasectomy.ResultsMedian time from nephrectomy to recurrence was 16 months. The risk score was strongly associated with median survival and the 2-year survival rate, including 73 months and 81% for favorable risk, 28 months and 54% for intermediate risk, and 6 months and 11% for poor risk, respectively (log rank <0.001). Metastasectomy performed in 44 patients (34%) was found to be of clinical benefit across the various risk categories (interaction analysis p = 0.8). On multivariate analysis a better risk category and metastasectomy were each independently associated with more favorable survival (each p <0.001). When combined, they provided 6 risk categories with an estimated 2-year survival of 0% to 93%.ConclusionsThe clinical course in patients with recurrent renal cell carcinoma following nephrectomy can be variable. It is independently impacted by an objectively determined risk score and whether the patient undergoes metastasectomy.