This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Pathology
[{'content': 'Proliferating breast mass is \nSelect and explain. \nA. Duct ectasia, B. Fibroadenoma, C. Adenosis, D. Papilloma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: the proliferating epithelium projects as multiple small papillary excrescences into the ductal lumen (ductal papillomatosis). The degree of hyperplasia, judged in pa by the number of layers of intraductal epithelium, can be mild, moderate, or marked. Occasionally, hyperplasia produces microcalcifications on mammography, raising concern for cancer. ref : Robbins Basic Pathology, 9E,page-706', 'role': 'assistant'}]