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  • Title: Impact of moderate dose of postoperative radiation on urinary continence and potency in patients with prostate cancer treated with nerve sparing prostatectomy.
    Author: Formenti SC, Lieskovsky G, Simoneau AR, Skinner D, Groshen S, Chen SC, Petrovich Z.
    Journal: J Urol; 1996 Feb; 155(2):616-9. PubMed ID: 8558674.
    Abstract:
    PURPOSE: We analyzed the impact on potency and urinary continence of moderate doses of radiation (45 to 54 Gy.) given postoperatively after nerve sparing prostatectomy. MATERIALS AND METHODS: Between 1983 and 1992, 294 of 762 prostate cancer patients were selected to undergo nerve sparing prostatectomy. Subjective patient reports regarding potency and urinary continence status were obtained preoperatively, 1 year postoperatively or 1 year after completion of radiation. RESULTS: Of the 294 patients 105 received postoperative radiotherapy (45 to 54 Gy.) to the prostatic bed. There were patients with more advanced stages of disease in the irradiated group, including 89% with stages C and D1 (pT3N0 and pT1 to 3, N1 to 3), compared to 14% with stages C and D1 (pT3N0 and pT1 to 3, N1 to 3) in the nonirradiated group (p < 0.001). No difference in urinary continence was noted in the irradiated (94%) compared to the nonirradiated group (92%, p = 0.64). Of the patients who underwent bilateral nerve sparing prostatectomy 44% who received and 48% who did not receive radiation had recovered potency at 1 year (p = 0.76). Of those who underwent unilateral nerve sparing prostatectomy 10% who received and 33% who did not receive radiation had recovered potency at 1 year (p = 0.14). Using multivariate analysis patient age younger than 63 years and bilateral versus unilateral nerve sparing procedures were significant predictors of potency. CONCLUSIONS: Our retrospective study suggests that at 1 year after treatment moderate doses of postoperative radiotherapy did not have a significant impact on the recovery of urinary continence and potency after nerve sparing prostatectomy. However, longer followup is required to determine the impact of this radiation protocol on long-term preservation of potency after nerve sparing prostatectomy.
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