Fibroadenoma in supernumerary breast

Area of Science:

• Reproductive Medicine
• Surgical Pathology
• Medical Imaging

Background:

• Supernumerary breast, also known as polymastia, is a relatively common congenital anomaly.
• Fibroadenomas are the most common benign breast tumors, typically occurring in women of reproductive age.
• While fibroadenomas are frequent in normal breast tissue, their occurrence in supernumerary breasts is infrequently reported in medical literature.

Observation:

• A 26-year-old woman presented with a palpable mass in her supernumerary breast, located inferior to the left pectoral breast.
• Clinical examination and ultrasonography of the normal pectoral breasts showed no significant findings.
• A distinct mass was identified within the supernumerary breast tissue during the examination.

Findings:

• Histopathological examination confirmed the presence of an intracanalicular type of fibroadenoma within the resected supernumerary breast tissue.
• The contralateral and ipsilateral normal breasts were found to be free of any neoplastic or significant pathological changes.
• The case highlights a rare instance of benign breast tumor development in an accessory breast structure.

Implications:

• This case contributes to the limited literature on fibroadenomas occurring in supernumerary breast tissue.
• It underscores the importance of thorough clinical evaluation and imaging, even in accessory breast locations, when abnormalities are suspected.
• Understanding the potential for benign neoplasms in supernumerary breasts is crucial for accurate diagnosis and patient management.