Prevalence and awareness of actinic keratosis: barriers and opportunities.

Actinic keratoses (AKs) are common skin lesions that appear after long-term exposure to ultraviolet radiation. The presence of AKs is associated with an increased risk for development of nonmelanoma skin cancer. AKs vary widely in clinical and histologic presentation, which contributes to inadequate identification and presents challenges for consensus classification. Clinically adequate reduction in AK prevalence requires a multifaceted approach. There is a reasonable need to increase awareness and knowledge about AK, including symptoms, prevention, and associated risk of nonmelanoma skin cancer, especially among the public at large. Safe and effective treatment strategies are needed to optimize clearance of AKs, ideally to prevent progression to invasive cutaneous neoplasia.