Phyllodes tumour arising in the ectopic axillary breast tissue, mimicking axillary lymphadenopathy.

A 46-year-old woman came to our hospital with a right axillary mass. She had no significant medical or family history of cancer. There were no abnormal findings in the bilateral breasts on palpation, mammography or ultrasound (US), but a hard, elastic mass of approximately 20 mm was palpated in the