Skin cancer is the most common of all types of cancer. There are some types of this cancer, basal cell carcinoma, squamous cell carcinoma, and melanoma. Basal, the most common form, develops at the base or at the bottom of the epidermis, the top of the skin. Squamous cell carcinoma, the second most common, is introduced into the upper layers of the epidermis. The American Cancer Society estimates that basal and squamous cell carcinoma of the skin calls more than 1.3 million new cases each year, but only 1,900 deaths. In Canada, 68,000 cases of basal cell and squamous cell carcinomas are diagnosed each year.
The third type of skin cancer is melanoma. It develops in melanocytes or pigment cells in the basal layer. Melanoma is a severe form of this cancer and is responsible for almost 1/3 of all deaths from this cancer. about 48,000 recent cases of melanoma diagnosed each year die in the United States, and 7,700 people die from this disease each year. The state of malignant melanoma in the United States is growing faster than any other cancer, and one person in the 1990s develops melanoma 12 times more often than a person born in the 1940s. In Canada, about 3,100 new cases of melanoma are diagnosed each year.
Skin cancer can develop anywhere on the skin, but about 90% develop in areas exposed to the sun, especially in the face, neck, back, hands, and scalp from solar men. Straight bald head, especially in childhood, is the most important risk factor for this cancer, as well as the number of blisters sunburn in humans, the greater the risk of developing skin cancer in the future. People with fair skin are at increased risk of skin cancer, especially when the skin is burning or freckles easily.
Family history of this cancer, the risk to humans. Research is currently underway to determine which people are susceptible to genetic diseases. In 1996, this allowed such scientists to detect a gene that, in their opinion, causes basal cell carcinoma. A gene such as a patch or PTC contributions to cell growth and gene development. If missing, damaged, or damaged by UV light are known, there may be uncontrolled cell division. Another aberrant gene, called the multiple tumor suppressor, is made as part of melanoma.
Diet can also play a role. A recent study found that patients on a high-fat diet had 20 percent less pre-cancerous lesions and skin cancer than those who ate about 38% fat.
Sunlight reaching the surface of the earth is two types of ultraviolet (UV). UV-A and UV-B contribute to sunburn, as well as cancer, as well as diseases such as premature aging of the skin. The US Environmental Protection Agency has determined that increased ozone degradation in the atmosphere, radiation, is detrimental to skin and the rate of skin cancer in the future.
The Cancer Foundation recommends that people avoid the sun at the highest level (10–4 m) in the shade and with clothes and a hat with a wide brim. He also asks to use regular use of sunscreen, which, as has been proven, prevents the development of precancerous actinic (skin lesions that occur in middle age) and reduces the risk of skin cancer. Since for many years skin cancer increases slowly, it is necessary to protect against the excessive exposure of the sun in childhood. People should avoid avoiding the same ultraviolet light as the sun. It has been proven that regular self-analysis of the skin is also important for detecting early signs of skin cancer. Some changes or skin diseases, the doctor said.
