Background: Ectopic, axillary breast tissue can develop any disease that affects the normal breast, including fibroadenoma.
Objective: To report and discuss a case of fibroadenoma of the axilla in a 23-year-old woman.
Methods: Case report and discussion of the rare entity of fibroadenoma of the axilla.
Results: The histology was identical to the fibroadenomas seen in the breast and those observed along the milk line.
Conclusion: Differential diagnosis of an axillary tumor should include ectopic breast tissue.