Chronic erythematous, scaly macule or papule, single or multiple. Most commonly located on areas of skin with prolonged sun exposure (e.g., face, lower lip, dorsum of the hands, forearms, bald areas of the scalp, and ears) of middle-aged or older men with light-colored skin.
Has the potential to progress into an invasive squamous cell carcinoma (SCC).
Although diagnosed clinically, a biopsy may help rule out SCC.
Treatment consists of destructive methods (e.g., cryotherapy with liquid nitrogen, curettage with or without electrodesiccation, chemical peels, and photodynamic therapy) or topical medication (e.g., topical fluorouracil, imiquimod, diclofenac, or ingenol mebutate).
Regular actinic keratosis
From the collection of the Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine