Benefits versus risks from mammography: a critical reassessment

Area of Science:

• Radiology
• Oncology
• Public Health

Background:

• Mammography use has surged, with benefits in early breast cancer detection and mortality reduction.
• Balancing screening benefits against radiation risks, costs, and other factors is crucial.
• Previous risk assessments relied on outdated epidemiological data.

Purpose of the Study:

• To evaluate current literature on breast cancer detection benefits versus radiation carcinogenesis risks.
• To calculate the benefit-to-risk ratio for annual mammography screening initiated at various ages.

Main Methods:

• Literature review of current data on mammography benefits and radiation risks.
• Calculation of individual expected benefits and radiation risks for annual screening.
• Analysis of benefit-risk ratios across different starting ages for screening.

Main Results:

• Minimal breast cancer risk from mammography radiation for women over 35.
• Potential risks identified for younger, genetically sensitive subgroups.
• Benefit-risk ratios significantly favor screening, especially when initiated later.

Conclusions:

• For women aged 50-75, mammography benefits outweigh radiation risks by nearly 100:1.
• For women aged 35-75, mortality reduction benefits exceed radiation risks by over 25:1.
• Current data supports mammography screening's favorable benefit-risk profile for most women.