What are actinic keratoses?

Actinic keratoses are indeed precancerous lesions that result from prolonged exposure to ultraviolet (UV) radiation, primarily from the sun. These growths appear as rough, scaly patches on sun-exposed skin areas, such as the face, ears, neck, scalp, and back of the hands. The term "actinic" refers specifically to damage caused by light, which emphasizes the significant link between UV exposure and the development of these lesions.

These lesions are considered precursors to skin cancer, particularly squamous cell carcinoma, which is why it is crucial to monitor and manage them appropriately. They reflect the skin’s attempt to repair itself from UV-induced DNA damage. Regular skin checks and dermatological evaluations can help in early identification and intervention.

The other options describe different skin conditions that do not relate to the effects of UV exposure. Skin tags are benign growths commonly associated with aging, red patches often signify allergic reactions, and fungal infections can present with various symptoms but are distinct from actinic keratoses. Understanding the nature and implications of actinic keratoses is important for skincare and cancer prevention.