Experts report with dismay that the number of cases of melanoma in the world continues to grow. Approximate statistics for Russia – 4-5 new cases per year per 100,000 inhabitants. As oncologists suggest, we have begun to spend more time in southern countries with high ultraviolet activity and are exposed to solar radiation, without worrying about protection. UV rays remain the main factor provoking the malignant degeneration of pigment cells.