Figure 2

Morphological characteristics of the lesion; (A) the lesion shows multilobulated outlines and pushing margins (hematoxylin-eosin, magnification 4×); (B) the benign component is composed of rounded or elongated tubules lined by a single layer of epithelial cells and one or two layers of myoepithelial cells (hematoxylin-eosin, magnification 40); (C) the malignant component shows cytological atypia of epithelial and myoepithelial components (hematoxylin-eosin, magnification 40×).