Proliferating breast mass is
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
Duct ectasia
Fibroadenoma
Adenosis
Papilloma
Breast