What is actinic keratosis?

• A. A viral skin infection
• B. A genetic skin disorder
• C. A precancerous skin condition from sun exposure
• D. An autoimmune skin reaction

Answer: (C)

Actinic keratosis is classified as a precancerous skin condition that results from prolonged exposure to ultraviolet (UV) light, typically from the sun. It manifests as rough, scaly patches on sun-damaged skin, which are often found on areas frequently exposed to sunlight, such as the face, ears, neck, scalp, and backs of the hands. The primary risk associated with actinic keratosis is its potential to progress to squamous cell carcinoma, a type of skin cancer, if left untreated.

Understanding that actinic keratosis is spurred by UV exposure helps in the prevention strategies, which include using sunscreen, wearing protective clothing, and avoiding excessive sun exposure. This background makes it clear why the condition is categorized as precancerous rather than caused by infections, genetic mutations, or autoimmune reactions.