Skin cancer is a disease in which cancer (malignant) cells are found in the outer layers of your skin. The skin has two main layers and several kinds of cells. The top layer of skinis called the epidermis. It contains three kinds of cells:
* flat, scaly cells on the surface called squamous cells,
* round cells called basal cells, and
* cells called melanocytes, which give your skin its color.

There are several types of cancer that start in the skin. The most common are basal cell cancer and squamous cell cancer. These types of skin cancer are called non-melanoma skin cancer. Melanoma is a type of skin cancer that starts in the melanocytes. It is not as common as basal cell or squamous cell skin cancer, but it is much more serious. Other kinds of cancer that may affect the skin include cutaneous T-cell lymphoma, a cancer of the lymph system, and Kaposi's sarcoma.

Skin cancer is more common in people with light colored skin who have been exposed to sunburns and sunlight. Skin cancer is most common in places that have been exposed to more sunlight, such as your face, neck, hands, and arms. Skin cancer can look many different ways. The most common sign of skin cancer is:
* a change on the skin, such as a growth or a sore that won't heal,
* a smooth, shiny and waxy looking lump, that is reddish brown, or
* a flat red spot that is rough or scaly.

Not all changes in your skin are cancer, but you should see your doctor if you notice changes in your skin. Like most cancers, skin cancer is best treated when it is found early. If you have a spot or lump on your skin, your doctor may remove the growth and look at the tissue under a microscope.

Treatment may include one of the following:
* topical chemotherapy,
* cryosurgery (freezing) ,
* electrodesiccation and curettage (burning) ,
* sanding the top layer of skin (dermabrasion) ,
* shaving the very top layer of skin, and
* laser therapy.

Most non-melanoma skin cancers can be cured if treated early. Any change in a mole needs to be reported. The sooner any skin cancer is discovered, the better the outcome. To learn more, call the American Cancer Society at (800) 227-2345 or the National Cancer Institute at (800) 4-CANCER.

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