Accessory Breast Carcinoma

Background: Ectopic breast tissue usually develops along the mammary ridges, and the incidence has been reported to be 2–6% of the general population. Occurrence of primary carcinoma in ectopic breast tissue is rare. Case Report: We report the case of 59-year-old woman with accessory breast carcinoma in her left axilla. Conclusion: Because an accessory areola or nipple is often missing and awareness of physicians and patients about these unsuspicious masses is lacking, clinical diagnosis of accessory breast carcinoma is frequently delayed. Therefore, a mass along the ‘milk line’ should be examined carefully, and any suspicious lesions should be evaluated.

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