A benign well encapsulated tumor formed of proliferating breast ducts and stromal fibrocytes. In areas both component are represented equally (pericanalicular pattern) however, in other areas fibroblastic proliferation dominates thus compressing ducts into slit-like structures (intracanalicular pattern). No evidence of malignancy.
Lt. breast mass.
Rubbery circumscribed masse submitted as two parts, collectively measured 2.8x2.5x1.5 cm, totally embedded.
Left Breast Mass, Excision biopsy: