Figure 1.

Basal cell carcinoma—nodular (solid) type. (A). Tegument covered by a keratinized stratified squamous epithelium, showing a tumoral proliferation in the underlying dermis composed of plaques of cells with a basaloid appearance, with nuclei palisading at the periphery. The plaques have a solid, compact appearance, with varied shapes and sizes. (B). Keratinized stratified squamous epithelium, ulcerated, showing a tumoral proliferation in the underlying dermis composed of plaques of cells with a basaloid appearance with abundant chronic inflammatory infiltrate in the peritumoral stroma.