72-year-old female exhibited an indurated area of the skin of the left cheek. Excision was performed.
- The architecture of epidermis, dermis and skin adnexa is maintained.
- The thickened dermis displays an increased amount of collagen fibers and plump, irregular elastic fibers (elastosis).
- Epidermis presents circumscribed acanthosis and hyperkeratosis. Neither parakeratosis nor dysplasia of epithelial cells is present.