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  • Title: Is breast conservation therapy a viable option for patients with triple-receptor negative breast cancer?
    Author: Parker CC, Ampil F, Burton G, Li BD, Chu QD.
    Journal: Surgery; 2010 Aug; 148(2):386-91. PubMed ID: 20580045.
    Abstract:
    BACKGROUND: Triple-receptor negative breast cancers (TNBC) are aggressive neoplasms that lack estrogen-receptor, progesterone-receptor, and HER-2 expressions. Comparative analysis of breast conservation therapy (BCT) versus mastectomy for TNBC is reported sparsely. We hypothesized that, despite its aggressive behavior, TNBC can be managed with BCT. METHODS: Outcomes for 202 patients with TNBC who were treated with BCT or mastectomy were analyzed. Primary endpoints were cancer recurrence and death. Statistical analysis performed included Kaplan-Meier survival analysis, log-rank, independent samples t test, Cox proportional hazard model, and Chi-square. RESULTS: BCT was performed in 30% of patients. Isolated local recurrence rate for BCT and mastectomy was 0% and 10.6%, respectively (P = .02). Isolated regional recurrence rate for BCT and mastectomy was 1.6% and 1.4%, respectively (P = .61). Neither concomitant locoregional and distant recurrence rate (P = .73) nor isolated distant recurrence rate (P = .71) was significantly different between the BCT and mastectomy groups. The 5-year overall survival (OS) was better for the BCT group than the mastectomy group (89% vs 69%; P = .018); however, this was likely due to the mastectomy group having a larger neoplasm size (T3/T4: 4% BCT vs 27% mastectomy; P = .0002), advanced N-disease (N2/3: 8% BCT vs 25% mastectomy; P = .0003), and advanced stage of disease (stage 3: 8% BCT vs 35% mastectomy; P < .0001). On multivariate analysis, surgical approach had no effect on either disease-free survival (P = .60) or OS (P = .19); only t-stage was an independent predictor of disease-free survival (P = .02), while N-stage was an independent predictor for OS (P = .03). CONCLUSION: Despite TNBC's aggressive behavior, breast conservation therapy is a viable option for selected patients with TNBC.
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