Fig. 1

Histomorphological features of the apocrine mixed tumor. a Low power view of the tumor with unbreached fibrous capsule and intact epidermis at the left lower corner. Dual epithelial and mesenchymal components are seen (hematoxylin and eosin × 40). b Bilayer arrangement and snouting of the epithelial cells around the ducts and cystic structures (hematoxylin and eosin × 100). c Plasmacytoid differentiation of tumor cells or hyaline cells (hematoxylin and eosin × 400). d Lipomatous differentiation (hematoxylin and eosin × 400). e Cystic structures with lamellar keratinized material, calcification and histiocytic giant cells (hematoxylin and eosin × 40)