Figure 10.

Pilomatricoma and trichoblastoma. (A). Pilomatricoma—tumoral proliferation consisting of islands of basaloid cells without atypia, occasionally flattened, and focal areas completely devoid of cells, replaced by cells with indistinct contours, intensely eosinophilic cytoplasm, and inconspicuous nuclei (phantom cells) extending towards the center of the lesion. (B). Trichoblastoma. Tumoral proliferation composed of nodules of varying sizes with cells that have basophilic cytoplasm and are monomorphic and without cyto-nuclear atypia. The surrounding stroma has a fibromyxoid appearance.