“…The former is a benign tumour arising in the mammary stroma, which can be confused with fibromatosis in that it is composed of spindle-shaped cells arranged in short intersecting fascicles interrupted by keloidal-like collagen bands 20,21 . In myofibroblastomas that contain a significant intratumoural fatty component (lipomatous myofibroblastoma), the spindleshaped cells, closely intermingling with adipocytes, impart a fibromatosis-like infiltrative pattern to the tumour 22 . Unlike myofibroblastoma, fibromatosis exhibits infiltrative, at least focally, margins, entraps fat and glandular breast tissue, and the neoplastic cells lack diffuse expression of desmin, CD34, oestrogen/ progesterone receptors and bcl-2 protein [20][21][22][23] .…”