Long-term survival following radical prostatectomy in Japanese men with clinically localized prostate cancer: A single institutional study


Takahiko Hachiya md, Department of Urology, Nihon University School of Medicine, 30-1 Oyaguchikamimachi Itabashi-ku, Tokyo 173-8610, Japan. Email: hachiya@med.nihon-u.ac.jp


Background:  We evaluated the outcome of radical prostatectomy to provide information about long-term survival following this procedure.

Methods:  One hundred and twenty-three otherwise healthy Japanese patients with clinically localized tumors underwent radical prostatectomy. Treatment outcomes were measured in terms of clinical progression-free survival, prostate cancer-specific survival and overall survival. Overall survival was compared with expected survival of age-matched Japanese men.

Results:  For these 123 patients, clinical progression-free survival and prostate cancer-specific survival at 10 years were 72.5% and 86.4%, respectively. Results of Cox multivariate analysis showed that only pathological stage (P = 0.047) and tumor grade (P = 0.009) were independent predictors of clinical progression. Only tumor grade was a statistically significant independent predictor (P = 0.048) in terms of prostate cancer death. Both the 10 and 15-year overall survival rates for these 123 patients were 58.6%, whereas the expected survival of age-matched Japanese men was 65.0% at the 10-year follow up, and 43.8% at the 15-year follow up.

Conclusions:  The long-term overall survival in this surgically treated group is comparable to the expected survival rate of age-matched Japanese men. These results might be useful in counselling patients with clinically localized prostate cancer.