[A woman with a large mass in the breast].

A 45-year-old woman presented with a palpable mass in the right breast. Ultrasound and mammography showed a cystic mass measuring 5 cm, with a solid component. The diagnosis 'intraductal papilloma' was made, based on the histological findings after biopsy. We performed lumpectomy and the diagnosis was confirmed by immunohistochemistry. Six months later, there were no signs of recurrence.