Fig. 4: Representative histologic and immunohistochemical images of fibroadenoma, low-grade phyllodes tumor, and high-grade phyllodes tumor.

Fibroadenoma (left column), low-grade phyllodes tumor (middle column), and high-grade phyllodes tumor (right column) stained with hematoxylin and eosin (a–c, 100×), Ki-67 (d–f, 200×), p53 (g–i, 200×), and β-catenin (j–l, 200×).