Abstract
Contralateral prophylactic mastectomy (CPM) is often discussed as a treatment option for women with a diagnosis of unilateral breast cancer. The purpose of this study was to identify the prevalence of pathology within the specimen at the time of CPM and to evaluate potential risk factors. Patients with a unilateral breast malignancy who underwent CPM were identified from the database of Scott and White Breast Cancer Clinic. A retrospective cohort study comparing disease status and various exposure parameters was conducted via chart review. Of the 301 patients who met the inclusion criteria, there were 14 cases (4.7%) with malignancy and 45 cases (15.0%) with moderate-to-high risk lesions. Multivariate analysis demonstrated 2 independent factors predictive of malignant or moderate-to-high risk lesions: age >54 years and lobular histology in the original specimen. The prevalence of malignant and premalignant lesions at the time of CPM was nearly 1 in 5.
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