Clinical outcomes and toxicity of estramustine phosphate (EP) addition to docetaxel (D) as first-line therapy for castration-resistant prostate cancer (CRPC): A cumulative analysis on 243 patients (pts) from two randomized phase II trials.
2013
208 Background: Although EP exerts a synergism with D and a meta-analysis suggested a survival advantage in combining EP to chemotherapy, D+EP combination is usually discouraged due to a marginal improvement in disease control at cost of an enhanced toxicity compared to D alone. In order to assess the role of EP added to D we have analyzed data from pts enrolled in two randomized trials with D ± EP conducted by our group (BJU Int 2008 – ASCO GU 2012). Methods: All patients received D 70 mg/m2IV q 3 wks ± E 280 mg/TID PO for 5 days starting 1 day prior to D. Ninety-five pts of the first study (started in 2002) were treated until progression; 148 pts of the second study received 8 D courses in continuous or intermittent fashion. We evaluated PSA response, PFS according to PCWG2, OS and toxicity. Results: We shared the clinical data from all 243 pts (123 D, 120 D+EP): the median baseline PSA values were 53 and 60 respectively; 49.5% and 59.1% of the D and D+EP pts presented visceral metastases, respectively....
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