Fibroadenoma in Ectopic Breast Tissue of Axilla: A Rare Entity

摘要

Dear Editor, A 42-year-old female presented with complaints of swelling in the left axilla since 2 months. On clinical examination, a well-defined nodular lesion measuring 1.0 cm x 1.0 cm was noted in the subcutaneous plane in the left axilla. On deep palpation, there was tenderness which developed since 3 weeks, and the nodular lesion was felt separate from the axillary tail of breast. The patient gave no positive family history for breast carcinoma. Contralateral breast/axilla did not show similar lesions. The patient was referred for ultrasonography which revealed a well-defined hypoechoic lesion measuring 12 mm x 10 mm in the left axilla with no significant internal vascularity [Figure la]. Differential diagnoses of lymphadenopathy/fibroadenoma were considered. Fine-needle aspiration cytology (FNAC) of the material obtained from the nodular lesion revealed clusters of epithelial cells with abundant stroma and preserved myoepithelial cells consistent with a diagnosis of fibroadenoma [Figure 1b]. A diagnosis of fibroadenoma was confirmed in the accessory breast tissue.