Randomized data from SWOG 8794 and EORTC 22911 confirm the benefit of post-operative radiation therapy (RT) for selected patients with pT3 prostate cancer (CaP) after radical prostatectomy (RP). However, data regarding the potential benefit of RT for patients post-RP with positive lymph node (+LN) involvement are limited. We analyzed the Surveillance Epidemiology End Results (SEER) registry for population-based data on efficacy of post-operative RT for +LN patients after RP. As LN data have only been captured by SEER since 1988, we analyzed data for 1988–1992, with specific attention to 10-year relative survival (defined as observed survival divided by the survival of a gender-, age- and race-matched population cohort without disease). Specifically analyzed were data for 1921 patients with nonmetastatic prostate cancer who underwent surgery alone, or surgery followed by RT, and who had +LNs documented. SEER does not code the interval between surgery and RT, so the ratio of patients receiving salvage versus adjuvant therapy is unknown. Using follow-up data through 2002, post-diagnosis survival was examined by number of +LNs. There was no significant relative survival benefit for +LN patients receiving post-operative RT (χ2P=0.270). These data do not support routine use of post-operative RT for patients with +LNs in the surgical specimen.
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Dr Johnstone and Dr Assikis are Georgia Cancer Coalition Distinguished Cancer Scholars, supported in part by the Georgia Cancer Coalition. Dr Johnstone is supported in part by NCMHD Grant 5P60-MD000525. Selected for podium presentation at the 92nd Scientific Assembly and Annual Meeting of the Radiological Society of North America, Chicago, 29 November 2006.
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Johnstone, P., Assikis, V., Goodman, M. et al. Lack of survival benefit of post-operative radiation therapy in prostate cancer patients with positive lymph nodes. Prostate Cancer Prostatic Dis 10, 185–188 (2007). https://doi.org/10.1038/sj.pcan.4500940
- prostate neoplasms
- lymph nodes
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