Lesions affecting the terminal duct lobular unit (TDLU) in breast are all except: (A) Nipple adenoma, (B) Blunt duct adenosis, (C) Intraductal papilloma, (D) Fiboadenoma
Answer is A. There are two types of noninvasive breast carcinoma: DCIS and LCIS. Morphologic studies have shown that both types usually arise from cells in the terminal duct lobular unit but the nipple adenoma doenot belongs to it. ref : Robbins Basic Pathology, 9E,page-710