There are many features of breast disease that encompass a wide spectrum of morphologic and radiologic findings, which have a varying risk of subsequent carcinoma.  Some of these entities are thought to be direct precursors to invasive carcinoma, and others just signify a component of future risk of invasive carcinoma.

Non-Atypical Lesions

• Fibrocystic Change
• Usual Type Hyperplasia (UTH)
• Sclerosing Adenosis
• Complex Sclerosing Lesion/Radial Scar
• Intraductal Papilloma
• Fibroadenoma

Miscellaneous Findings

• Fat Necrosis
• Collagenous Spherulosis

Atypical Lesions

• Flat Epithelial Atypia
• Atypical Ductal Hyperplasia (ADH)
• Atypical Lobular Hyperplasia (ALH)

Breast Lesions and Risk of Developing an Invasive Carcinoma

Breast Immunohistochemsitry