SAN FRANCISCO – Partial nephrectomy for localized renal cell carcinomas (RCCs) is on the rise, but the procedure is still less commonly performed than radical nephrectomy and more commonly performed at high-volume surgical centers.
About half of localized renal tumors are excised through partial nephrectomy, based on results from a new analysis of The National Cancer Database. The study also indicated that patient mortality rates were lower at high volume centers, those in the top 10 percentile of treatment volume, said David Cahn, DO, who presented the results at the annual meeting of the American Urological Association.
The study looked at surgeries among 142,000 patients with pT1a-T2b RCCs (no involvement of lymph nodes or metastases) who underwent procedures during 2004-2014.
Overall, 41% of patients had partial nephrectomies, 58% had radical nephrectomies, and 1% received ablative therapy. The frequency of partial nephrectomies rose markedly over the course of the study, increasing from 24% of cases in 2004 to 53% in 2014. The vast majority of partial nephrectomies, 81%, were performed for pT1a tumors; 24% of pT1b tumors also were excised using partial nephrectomy.
Compared with the reference point of T1a tumors, T1b tumors (odds ratio, 0.22; P less than .0001), T2a (OR, 0.06; P less than .0001), and T2b tumors (OR, 0.03; P less than .0001) were progressively less likely to be treated with partial nephrectomy. A multivariate analysis showed that patients at a high volume center were significantly more likely to undergo partial nephrectomy (OR, 1.89; P less than .0001). Overall mortality was lower at high volume centers (hazard ratio, 0.92; P = .012).