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  • Title: Oncologic outcomes for lymph node-positive urothelial carcinoma patients treated with robot assisted radical cystectomy: with mean follow-up of 3.5 years.
    Author: Mmeje CO, Nunez-Nateras R, Nielsen ME, Pruthi RS, Smith A, Wallen EM, Humphreys MR, Woods ME, Castle EP.
    Journal: Urol Oncol; 2013 Nov; 31(8):1621-7. PubMed ID: 22534088.
    Abstract:
    PURPOSE: Previous studies have shown robot assisted radical cystectomy (RARC) to have comparable perioperative outcomes to open radical cystectomy. There are few reports that have examined the oncologic results of RARC, specifically with respect to lymph node-positive patients. We report the outcomes of pathologic node-positive patients who have undergone RARC with medium-term follow-up. MATERIALS AND METHODS: A total of 275 patients underwent RARC at 2 institutions for invasive bladder cancer between April 2005 and June 2009. We examined the 50 patients with lymph node-positive disease. Oncologic outcomes, overall, and recurrence-free survival were analyzed and compared with the open literature. RESULTS: Mean (median) clinical follow-up in this cohort was 42 (39.5) months (range 16-75 months). The mean (median) number of lymph nodes (LN) removed was 18 (17.5) (range 5-35), and mean (median) number of positive LN was 3 (2) (range 1-12). Mean lymph node density was 18%. Seventeen (34%) patients had ≤ pT2 disease and 33 (66%) pT3/T4 disease. At this follow-up, 29 patients have recurred, and 22 patients have died of disease. Mean (median) time to recurrence was 10 (9) months. The estimated overall survival at 36 and 60 months was 55%, and 45%, respectively. The recurrence-free survival at 36 and 60 months was 43%, and 39%, respectively. Thirty-three (66%) patients had an LN density <20%. The estimated overall survival at 36 months of patients with a lymph node density of <20% was higher than those with a lymph node density >20%, though the difference was not statistically significant. A total of 58% of patients received chemotherapy in this cohort. The use of chemotherapy was associated with a statistically significant (P = 0.033) improvement in overall survival, with an overall survival of 68% at 36 months compared with 36% for the patients who did not receive any chemotherapy. CONCLUSIONS: The oncologic outcomes of patients with lymph node-positive bladder cancer treated with robot assisted radical cystectomy (RARC) compare favorably to previous published studies of open radical cystectomy at medium-term (mean follow-up of 42 months). As our follow-up increases, we expect to continue to accurately define the long-term clinical suitability and oncologic success of this procedure in this high-risk population.
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