Merck Manual

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What Are the Risks of Developing Breast Cancer?

What Are the Risks of Developing Breast Cancer?

Age (Years)

Risk (%) in 10 Years

Risk (%) in 20 Years

Risk (%) in 30 Years

30

0.5

2.0

4.3

40

1.6

3.9

7.1

50

2.4

5.7

9.1

60

3.5

7.2

9.2

70

4.1

6.4

80

3.0

Based on seer.cancer.gov. Accessed on 8/30/20.