Cutaneous Periumbilical Fibroadenomas: A Rare Case of Ectopic Breast Tissue.

Ectopic breast tissue is the presence of retained breast tissue along the embryologic mammary ridge, also known as the milk line. Accessory tissue can be located anywhere along or outside the anatomic milk line extending from the axilla to the groin. Ectopic breast tissue can undergo the same physiologic and pathologic changes seen in normal breast tissue, such as fibroadenomas, fibrocystic changes, and malignancy. The wide range of clinical presentations and symptomatology can pose a significant diagnostic challenge, and clinicopathologic correlation is key in establishing the diagnosis. In this report, we review the clinical and histopathologic findings in a rare case of cutaneous periumbilical fibroadenomas in a 25-year-old female.