title: Ductal adenoma of the breast.
abstract: Ductal adenoma is a recently described benign tumour of the breast that can be mistaken for carcinoma in both frozen and paraffin sections. Such a case is presented. Fortunately a mastectomy was not performed, but the patient did undergo axillary node dissection. Surgeons and pathologists should familiarize themselves with this lesion so that patients do not have to undergo unnecessary mastectomies and axillary node dissections.
authors.affiliation: Department of Surgery, St. Joseph's Hospital, Hamilton, Ont.
authors.forename: S E
authors.initials: SE
authors.lastname: O'Brien
authors.forename: J M
authors.initials: JM
authors.lastname: Kay
authors.forename: V S
authors.initials: VS
authors.lastname: Chen
mesh_terms: D001365:Axilla; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000473:pathology; D005260:Female; D006801:Humans; D008197:Lymph Node Excision; D008875:Middle Aged; D010212:Papilloma / Q000175:diagnosis* / Q000473:pathology