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Bilateral breast cancer.

M Michowitz, S Noy, N Lazebnik

    Journal of Surgical Oncology
    |October 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Bilateral breast cancer occurred in 5.4% of women treated for breast cancer. Factors like fewer children and larger initial tumors increased risk, while longer survival after the first diagnosis heightened the chance of a second tumor.

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    Area of Science:

    • Oncology
    • Epidemiology

    Background:

    • Breast cancer is a significant health concern.
    • Understanding risk factors for bilateral breast cancer is crucial for early detection and improved patient outcomes.

    Purpose of the Study:

    • To investigate the incidence and risk factors associated with bilateral breast cancer.
    • To analyze the relationship between initial tumor characteristics and the development of a second breast tumor.
    • To explore prognostic factors influencing survival in patients with bilateral breast cancer.

    Main Methods:

    • Retrospective chart review of 1,215 patients diagnosed with breast cancer between 1972 and 1982.
    • Analysis of patient demographics, tumor characteristics (size, lymph node status), and reproductive history.
    • Statistical evaluation of risk factors and survival rates.

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    Main Results:

    • Bilateral breast cancer was diagnosed in 5.4% of the study cohort.
    • Higher incidence observed in nulligravidas and women with up to two children.
    • Larger initial tumor size (>4 cm) correlated with increased risk of a second tumor.
    • No axillary lymph node metastasis in 65.2% of patients who developed a second tumor.
    • No correlation found between histological types of the first and second tumors.
    • Longer survival post-first diagnosis increased the likelihood of a second tumor; longer interval between diagnoses improved survival.

    Conclusions:

    • Bilateral breast cancer is associated with specific demographic and clinical factors.
    • Early-stage diagnosis of the first tumor, particularly with no lymph node involvement, does not preclude the development of a second contralateral tumor.
    • Proactive monitoring and risk assessment are essential for patients diagnosed with unilateral breast cancer.