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[Current problems in mass screening for breast cancer].

T Morimoto, T Yamakawa, N Mitsuyama

    Gan to Kagaku Ryoho. Cancer & Chemotherapy
    |December 1, 1985
    PubMed
    Summary

    Mass screening for breast cancer in Japan detected cancers at earlier stages. Physical examinations are effective for early breast cancer detection, especially in older women, improving screening programs.

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    Biochemical and biophysical research communications·1995

    Area of Science:

    • Oncology
    • Public Health
    • Diagnostic Imaging

    Context:

    • Rising breast cancer morbidity and mortality in Japan necessitates widespread screening.
    • A 15-year mass screening program (1970-1984) in Tokushima prefecture involved 111,571 women.
    • Focus on early detection and improving screening efficacy for Japanese women.

    Purpose:

    • To evaluate the effectiveness of physical examinations for early breast cancer detection in a Japanese population.
    • To analyze detection rates and characteristics of breast cancers identified through mass screening.
    • To identify areas for improvement in breast cancer screening programs.

    Summary:

    • Breast cancer was detected in 116 women, with 26 classified as interval cancers.
    • Screen-detected cancers were diagnosed at earlier stages compared to outpatient cases.
    • Detection rates were 0.08% overall (0.13% initial, 0.04% repeat screening).
    • Cancers were more prevalent in women over 60; younger women (30s-40s) constituted the majority of examinees (64.2%).

    Impact:

    • Physical examination (inspection and palpation) is confirmed as a useful tool for early breast cancer detection in Japanese women.
    • Recommendations include encouraging older women's participation and increasing the proportion of initial examinees.
    • Future efforts should focus on optimizing screening methods, establishing follow-up systems, and promoting breast self-examination education.

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