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Objective:To investigate the clinicopathologic characteristics and prognosis in young patients with triple-negative breast cancer (TNBC).Methods:94 patients who were diagnosed with young TNBC at Cancer Hospital of CAMS between January 1999and December 2007 were included in the study.All the patients were less than 35 years old,with negative expression of the estrogen receptor (ER), the progesterone receptor(PR),and the human epidermal growth factor receptor-2 (HER-2).