A benign well encapsulated tumor formed of proliferating breast ducts and stromal fibrocytes. The latter predominate in the lesion thus compressing ducts into slit-like structures. Adjacent breast tissue showing breast tissue shows preserved normal lobular pattern with stromal fibrosis and adenosis. Cytologic features are unremarkable. No evidence of malignancy.
Lt breast mass.
Circumscribed rubbery mass received in two pieces measuring 1.8x1.5x1 cm in aggregate, showing homogenous white cut section.
Lt. Breast mass, excision biopsy: