Figure 4
From: Estrogen receptor-β is expressed in stromal cells of fibroadenoma and phyllodes tumors of the breast
Smooth muscle differentiation of stromal cells. (a) Double immunostaining of a cellular fibroadenoma; ER-β (brown nuclei) and smooth muscle actin (black cytoplasm) are coexpressed by stromal cells. (b) Benign phyllodes tumor; smooth muscle actin immunostaining. (c) Primary malignant phyllodes tumor and (d) its metastasis; calponin immunostaining.
