Fig. 4

On microscopic examination, a well-differentiated invasive squamous cell carcinoma composed of cells that resemble those of the normal squamous epithelium is shown. Keratinization is evident. Hematoxylin-eosin × 20
On microscopic examination, a well-differentiated invasive squamous cell carcinoma composed of cells that resemble those of the normal squamous epithelium is shown. Keratinization is evident. Hematoxylin-eosin × 20