PSA decline is an independent prognostic marker in hormonally treated prostate cancer.

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Abstract
Objective: The aim of this study was to estimate the prevalence of primary hormone-refractory prostate cancer and to evaluate the prognostic value of decline of prostate-specific antigen (PSA) after primary hormonal therapy. Material and Methods: The material consisted of 236 consecutive, hormonally treated prostate cancer patients, whose clinicopathological findings, as well as serum PSA values, were retrieved from patient files. Multivariate analysis was performed based on the PSA decline at 12 months from the commencement of therapy and patients were thereafter categorised into four groups: complete response (CR), partial response (PR), stable disease (SD), and no response (NR) according to the biochemical response. Results: Only 14 (5.9%) of the patients were included in the NR group, i.e. PSA declined less than 50%, suggesting that primary androgen-independent prostate cancer is uncommon. The PSA decline was significantly (p Conclusions: Primary prostate cancer is probably even more sensitive to hormonal treatment than previously assumed, and PSA decline seems to be useful in predicting disease outcome after hormonal therapy.

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