Table 3.

Summary of imaging characteristics for the most common high-risk lesions

High-risk lesion	Imaging findings
Lobular Neoplasia (LN)	Amorphous microcalcifications and grouped distribution
Atypical Intraductal Epithelial Proliferation (AIDEP)	Fine pleomorphic microcalcifications and linear or segmental distribution Irregular-shaped small hypoechoic mass with micro-lobulated edges
Flat Epithelial Atypia (FEA)	Grouped microcalcifications
Papillary Lesion (PL)	A solid, round mass with well-defined borders; an intra-cystic mass; or a hypo-echoic, well-defined mass in a dilated duct With internal vascular stalk and with/without microcalcifications
Phyllodes Tumor (PT)	Ovoid high-density mass lesion with irregular edges and usually lobulated Large size
Radial Scars (RS)	Radiolucent architectural distortion with or without calcifications