Mass screening for early breast cancer detection

Area of Science:

• Oncology
• Public Health
• Radiology

Background:

• The Center for Social Diseases of Florence initiated a breast cancer screening program in 1969.
• The program targeted women over 40 in outlying districts.

Purpose of the Study:

• To evaluate the effectiveness of a long-term breast cancer screening program.
• To assess the impact of mammography on early cancer detection and patient outcomes.

Main Methods:

• A total of 21,725 women were examined between January 1969 and March 1977.
• Mammography was the primary diagnostic tool, supplemented by physical examination.
• Follow-up included biennial mammography for negative cases.

Main Results:

• 67 cancers were detected during the initial mammography screening.
• A significant proportion of detected cancers were clinically unapparent (37%), stage T1A (62.3%), and node-negative (52%).
• The 5-year actuarial survival rate for detected cancers was 94% ± 3.7%.

Conclusions:

• The screening program confirmed its value in secondary prevention through early diagnosis.
• Early detection via mammography resulted in a better average stage at diagnosis compared to unscreened populations.
• The study discussed potential hazards of repeated mammography in mass screening contexts.