The skin has many very important functions in the human body. It covers the entire body and has a surface area of approximately ^2m2. Unfortunately, both the external factors to which it is exposed every day and various diseases can contribute to the development of skin changes. Some of them accompany us from birth. Skin cancer is still a huge challenge for many doctors. Most often, the patient is referred to a dermatologist at the initial diagnostic stage, only to find out that surgical and oncological help is required. What do we know about skin cancer?