Lobular ectopic breast carcinoma: A case-report
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Updated: May 4, 2026

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Endoscopic Bilateral Nipple-sparing Mastectomy via a Single Axillary Incision with Immediate Pre-pectoral Implant-based Breast Reconstruction
Published on: May 17, 2024
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André Soares1, Joana Gonçalves1, Isabel Azevedo1
1Radiotherapy Department, Instituto Português de Oncologia Francisco Gentil do Porto, E.P.E., Portugal.
Abstract:
In about 1-2% of the population an incomplete regression of the embryonic mammary line occurs, which may result in the presence of ectopic breast tissue. An ectopic breast tissue carcinoma is a rare entity. The authors present a case-report of a 51-year-old female patient, with a lobular carcinoma in an axillary ectopic breast tissue submitted to surgery and adjuvant radiotherapy.

