Skin cancer is a collective term for various malignant changes of the skin. The incidence has been continously increasing during the past decades. All over the world two to three million people develop skin cancer each year. For this reason skin cancer is currently the most common malignancy in Caucasians.

Non melanoma skin cancer includes actinic keratoses, squamous cell carcinoma and basal cell carcinoma. Non melanoma skin cancer shows a much higher incidence than melanoma and a significantly lower mortality.

Nonetheless, these tumors often occur multiple in sun exposed areas and repetitive surgical procedures are causing morbidity for the patients and high costs for the health care system.

The most important questions concerning skin cancer