Adenoma of the nipple.
D000236:Adenoma / Q000175:diagnosis / Q000473:pathology*; D000328:Adult; D001706:Biopsy; D001943:Breast Neoplasms / Q000175:diagnosis / Q000473:pathology*; D002285:Carcinoma, Intraductal, Noninfiltrating / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008854:Microscopy, Electron; D008875:Middle Aged; D010212:Papilloma / Q000175:diagnosis / Q000473:pathology*