The reason that causes this type of cancer is not entirely known. Yes, we have studied some factors that influence their occurrence.
Environmental factors
Excessive exposure to the sun influences the production of these cancers. People who work outdoors, such as farmers and sailors, have a higher incidence. Often occur on exposed skin, often in head and neck.
Although sunlight helps to synthesize vitamins A and D, overexposure, produce or burns, increases the risk of developing skin cancer, including malignant melanoma.
There is a correlation between risk of melanoma and latitude. It also influences the time period during which a person has lived in Ecuador-latitude countries, which means excessive sun exposure maintained for a period of life.
Not only influences but prolonged exposure to direct sunlight exposure, on time, on holiday for example, is a risk factor for melanoma.
Melanomas differ from malignant tumors non-melanoma skin about sex, age and body location. The majority of cutaneous malignant melanomas occur in areas not receiving the accumulated UV dose increased.
