Skin Cancer: Screening and Prevention

Area of Science:

• Dermatology and Oncology
• Public Health and Preventive Medicine

Background:

• Skin cancer is the most prevalent cancer in the U.S., with basal cell carcinoma (BCC) being the most common type across all demographics.
• Cutaneous squamous cell carcinoma (cSCC) disproportionately affects individuals with darker skin tones, while cutaneous melanoma (CM), though less common, poses a significant lethal threat, often diagnosed at later stages in darker-skinned populations.
• Ultraviolet (UV) radiation exposure is identified as the primary risk factor for skin cancer development.

Purpose of the Study:

• To review the current landscape of skin cancer screening, prevention, and emerging technologies.
• To highlight disparities in skin cancer incidence and outcomes among different racial and ethnic groups.
• To discuss the efficacy and limitations of various preventive measures and chemopreventive agents.

Main Methods:

• Review of existing literature and guidelines regarding skin cancer screening, including recommendations from the U.S. Preventive Services Task Force (USPSTF).
• Evaluation of the reliability and utility of smartphone applications, artificial intelligence (AI), and teledermatology for skin cancer detection and screening.
• Analysis of the effectiveness of sun protection strategies and chemopreventive agents like oral nicotinamide and systemic retinoids.

Main Results:

• The USPSTF found insufficient evidence to recommend routine visual skin cancer screening in asymptomatic individuals.
• Smartphone apps are deemed unreliable for skin cancer detection; AI and teledermatology show potential for triage and access but are not standard for population screening.
• Sun protection measures (education, sunscreen, protective clothing, sun avoidance) remain the cornerstone of prevention. Oral nicotinamide is effective in reducing new nonmelanoma skin cancers in high-risk patients.

Conclusions:

• Effective skin cancer prevention relies on established sun protection methods and public education.
• Current evidence does not support routine population-level screening, necessitating further research into reliable screening tools and technologies.
• Chemoprevention with oral nicotinamide offers a viable strategy for high-risk individuals, while other agents require careful consideration due to potential adverse effects.