But because many younger women are diagnosed at later stages with more aggressive breast cancer, their survival rate is lower.

但因为许多年轻女性在被诊断为乳腺癌时已处于晚期，癌细胞非常活跃，因而存活率非常低。

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This suggests that lower overall breast cancer survival in the UK is not because women are being diagnosed at a later stage than in other countries, the study says.

BBC: A mammography of a woman's breast