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Abstract
Objective: To investigate the clinicopathologic features of synchronous bilateral breast cancer (SBBC) and prognostic factors. Methods: The clinicopathologic features of patients with SBBC treated in Peking University First Hospital from January 2008 to March 2019 were retrospectively analyzed. Results: Of all 4 111 patients diagnosed with breast cancer, 57(1.4%) cases were diagnosed with SBBC.Forty-three (75.4%) patients were treated with bilateral mastectomy. The median follow-up time was 58 months. The 5-year disease-free survival of SBBC was 80.7% and 5-year overall survival was 84.1%. The N stage and HER2 status of second primary breast cancer were associated with prognosis by univariated analysis (Z=5.866 and 4.231, both P<0.05). Conclusion: Majority of patients with SBBC were treated with bilateral mastectomy. While therapeutic strategy of SBBC should take both tumor burden and biomarker status of bilateral breast cancer into consideration.
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