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Case Reports in Pathology
Volume 2016 (2016), Article ID 3603262, 4 pages
Case Report

A Nonpalpable Nodule in Ectopic Axillary Breast Tissue: Consider Phyllodes Tumor

1Department of Breast Surgical Oncology, Instituto de Enfermedades de la Mama y Fundación del Cáncer de Mama (IEM-FUCAM), Mexico City, Mexico
2Department of Pathology, IEM-FUCAM, Mexico City, Mexico
3Department of Radiology, IEM-FUCAM, Mexico City, Mexico

Received 30 July 2016; Revised 23 November 2016; Accepted 7 December 2016

Academic Editor: Janina Kulka

Copyright © 2016 Eva Ruvalcaba-Limón et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Benign and malignant pathology can develop in ectopic axillary breast tissue, such as fibroadenomas, phyllodes tumors, and breast cancer. We present a rare case of an asymptomatic 43-year-old woman with an axillary nodule which was identified during screening mammography within ectopic axillary breast tissue, initially considered as a suspicious lymph node. Radiologic studies were considered as Breast Imaging-Reporting Data System (BI-RADS) 4. A hyperdense, lobular, and well-circumscribed nodule was identified in mammogram while the nodule by ultrasound (US) was hypoechoic with indistinct microlobular margins, without vascularity by Doppler, and measuring  cm. Core-needle biopsy reported a fibroepithelial neoplasm. The patient was submitted to local wide-needle excision located in intraoperative radiography of the surgical specimen and margin evaluation. Final histopathological study reported a  cm benign phyllodes tumor, with irregular, pushing, and clear wide margins within normal ectopic breast tissue. The patient without surgical complications continued annual screening without recurrence during a follow-up that took place 24 months later.