Docetaxel Versus Surveillance After Radical Prostatectomy for High-risk Prostate Cancer: Results from the Prospective Randomised, Open-label Phase 3 Scandinavian Prostate Cancer Group 12 Trial
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AuthorsAhlgren, Göran M.
Tammela, Teuvo L.J.
Iversen, Jon Reidar
MetadataShow full item record
CitationDocetaxel Versus Surveillance After Radical Prostatectomy for High-risk Prostate Cancer: Results from the Prospective Randomised, Open-label Phase 3 Scandinavian Prostate Cancer Group 12 Trial 2018, 73 (6):870 European Urology
AbstractBACKGROUND: Adjuvant chemotherapy is standard treatment for other solid tumours, but to date has not proven effective in prostate cancer. OBJECTIVE: o evaluate whether six cycles of docetaxel alone improve biochemical disease-free survival after radical prostatectomy for high-risk prostate cancer. DESIGN, SETTING, AND PARTICIPANTS: Open-label, randomised multinational phase 3 trial. Enrolment of 459 patients after prostatectomy. INCLUSION CRITERIA: high-risk pT2 margin positive or pT3a Gleason score ≥4+3, pT3b, or lymph node positive disease Gleason score ≥3+4. Patients assigned (1:1) to either six cycles of adjuvant docetaxel 75mg/m2 every 3 wk without daily prednisone (Arm A) or surveillance (Arm B) until endpoint was reached. Primary endpoint was prostate-specific antigen progression ≥0.5 ng/ml. INTERVENTION: Docetaxel treatment after prostatectomy. RESULTS AND LIMITATIONS: Median time to progression, death, or last follow-up was 56.8 mo. Primary endpoint was reached in 190/459 patients-the risk of progression at 5 yr being 41% (45% in Arm A and 38% in Arm B). There was evidence of nonproportional hazards in Kaplan-Meier analysis, so we used the difference in restricted mean survival time as the primary estimate of effect. Restricted mean survival time to endpoint was 43 mo in Arm A versus 46 mo in Arm B (p=0.06), a nonsignificant difference of 3.2 mo (95% confidence interval: 6.7 to -1.5 mo). A total of 116 serious adverse events were recorded in Arm A and 41 in Arm B with no treatment-related deaths. Not all patients received docetaxel by protocol. The endpoint is biochemical progression and some patients received radiation treatment before the endpoint. CONCLUSIONS: Docetaxel without hormonal therapy did not significantly improve biochemical disease-free survival after radical prostatectomy. PATIENT SUMMARY: In this randomised trial, we tested whether chemotherapy after surgery for high-risk prostate cancer decreases the risk of a rising prostate-specific antigen. We found no benefit from docetaxel given after radical prostatectomy.
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