Biochemical disease-free survival in patients with a high prostate-specific antigen level (20-100 ng/mL) and clinically localized prostate cancer after radical prostatectomy.

Abstract

To examine our experience with radical prostatectomy (RP) in patients with a serum prostate-specific antigen (PSA) level of > 20 ng/mL (who are sometimes considered poor candidates for RP) to determine the outcome and possible predictors of a favourable outcome. We retrospectively reviewed the medical records of 79 patients who underwent RP with an initial PSA of 20-100 ng/mL. Biochemical disease-free survival (BDFS) was assessed using the Kaplan-Meier method and predictors of treatment outcome examined by uni- and multivariate analysis. Patients excluded from the analysis were 11 (14%) whose surgery was aborted after finding cancerous pelvic nodes and who did not undergo RP; four others with normal nodes during RP who had metastatic tumour on permanent sections; and 14 who had follow-up data for < 2 years. The mean (sd) age of the 50 patients in the final study population was 63 (7) years and the mean PSA 37.9 (16.0) ng/mL. The median (range) follow-up was 54 (24-120) months. The BDFS was 60% at 3 years and 48% at 5 years of follow-up. Two patients developed a local recurrence and eight developed metastatic disease. On logistic regression analysis of factors influencing BDFS, only extracapsular extension of disease was predictive of PSA recurrence; no preoperative factor was significant. When time to PSA recurrence was assessed by Cox regression analysis, again only extracapsular extension was predictive, with no preoperative variable a statistically significant predictor. Patients with a high serum PSA level (20-100 ng/mL) may be appropriate candidates for RP. While the cancer-free survival is not as good as in patients with a lower PSA, a significant percentage of patients achieve BDFS. No preoperative variables were predictive of disease-free survival or time to PSA recurrence.