Ovarian Ablation Using Goserelin Improves Survival of Premenopausal Patients with Stage II/III Hormone Receptor-Positive Breast Cancer without Chemotherapy-Induced Amenorrhea
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Purpose The purpose of this study was to assess the value of ovarian ablation using goserelin inpremenopausal patients with stage II/III hormone receptor-positive breast cancer withoutchemotherapy-induced amenorrhea (CIA). Materials and MethodsWe retrospectively reviewed the data of breast patients treated between October 1999 andNovember 2007 without CIA. The Kaplan-Meier method was used for calculation of thesurvival rate. Log rank method and Cox regression analysis were used for univariate andmultivariate prognostic analysis. ResultsThe median follow-up period was 61 months. Initially, 353 patients remained without CIAafter chemotherapy and 98 among those who received goserelin and tamoxifen (TAM). Inunivariate analysis, goserelin improved locoregional recurrence-free survival (LRFS) (98.9%vs. 94.1%, p=0.041), distant metastasis-free survival (DMFS) (85.4% vs. 71.9%, p=0.006),disease-free survival (DFS) (85.4% vs. 71.6%, p=0.005), and overall survival (OS) (93.5%vs. 83.5%, p=0.010). In multivariate analysis, goserelin treatment was an independentfactor influencing DMFS (hazard ratio [HR], 1.603; 95% confidence interval [CI], 1.228 to2.092; p=0.001), DFS (HR, 1.606; 95% CI, 1.231 to 2.096; p=0.001), and OS (HR, 3.311;95% CI, 1.416 to 7.742; p=0.006). In addition, treatment with goserelin resulted in significantlyimproved LRFS (p=0.039), DMFS (p=0.043), DFS (p=0.036), and OS (p=0.010) inpatients aged < 40 years. In patients aged 40 years, goserelin only improved DMFS(p=0.028) and DFS (p=0.027). ConclusionOvarian ablation with goserelin plus TAM resulted in significantly improved therapeuticefficacy in premenopausal patients with stage II/III hormone receptor-positive breast cancerwithout CIA.
Abstract
Purpose The purpose of this study was to assess the value of ovarian ablation using goserelin inpremenopausal patients with stage II/III hormone receptor-positive breast cancer withoutchemotherapy-induced amenorrhea (CIA). Materials and MethodsWe retrospectively reviewed the data of breast patients treated between October 1999 andNovember 2007 without CIA. The Kaplan-Meier method was used for calculation of thesurvival rate. Log rank method and Cox regression analysis were used for univariate andmultivariate prognostic analysis. ResultsThe median follow-up period was 61 months. Initially, 353 patients remained without CIAafter chemotherapy and 98 among those who received goserelin and tamoxifen (TAM). Inunivariate analysis, goserelin improved locoregional recurrence-free survival (LRFS) (98.9%vs. 94.1%, p=0.041), distant metastasis-free survival (DMFS) (85.4% vs. 71.9%, p=0.006),disease-free survival (DFS) (85.4% vs. 71.6%, p=0.005), and overall survival (OS) (93.5%vs. 83.5%, p=0.010). In multivariate analysis, goserelin treatment was an independentfactor influencing DMFS (hazard ratio [HR], 1.603; 95% confidence interval [CI], 1.228 to2.092; p=0.001), DFS (HR, 1.606; 95% CI, 1.231 to 2.096; p=0.001), and OS (HR, 3.311;95% CI, 1.416 to 7.742; p=0.006). In addition, treatment with goserelin resulted in significantlyimproved LRFS (p=0.039), DMFS (p=0.043), DFS (p=0.036), and OS (p=0.010) inpatients aged < 40 years. In patients aged 40 years, goserelin only improved DMFS(p=0.028) and DFS (p=0.027). ConclusionOvarian ablation with goserelin plus TAM resulted in significantly improved therapeuticefficacy in premenopausal patients with stage II/III hormone receptor-positive breast cancerwithout CIA.
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