title: A Nonpalpable Nodule in Ectopic Axillary Breast Tissue: Consider Phyllodes Tumor.
abstract: 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 1.26 × 1 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 1.8 × 1.2 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.
authors.affiliation: Department of Breast Surgical Oncology, Instituto de Enfermedades de la Mama y Fundación del Cáncer de Mama (IEM-FUCAM), Mexico City, Mexico.
authors.forename: Eva
authors.identifier: 0000-0002-4645-3019
authors.initials: E
authors.lastname: Ruvalcaba-Limón
authors.affiliation: Department of Pathology, IEM-FUCAM, Mexico City, Mexico.
authors.forename: Verónica
authors.initials: V
authors.lastname: Bautista-Piña
authors.affiliation: Department of Breast Surgical Oncology, Instituto de Enfermedades de la Mama y Fundación del Cáncer de Mama (IEM-FUCAM), Mexico City, Mexico.
authors.forename: Julio
authors.initials: J
authors.lastname: Ramírez-Bollas
authors.affiliation: Department of Radiology, IEM-FUCAM, Mexico City, Mexico.
authors.forename: Ruby
authors.initials: R
authors.lastname: Espejo-Fonseca
authors.affiliation: Department of Breast Surgical Oncology, Instituto de Enfermedades de la Mama y Fundación del Cáncer de Mama (IEM-FUCAM), Mexico City, Mexico.
authors.forename: Sergio
authors.initials: S
authors.lastname: Rodríguez-Cuevas