The skin is the largest organ in our body. It provides protection against heat, cold, light, and infection. The skin is made up of two major layers (epidermis and dermis) as well as various types of cells. The top (or outer) layer of the skin-the epidermis-is composed of three types of cells: flat, scaly cells on the surface called squamous cells; round cells called basal cells; and melanocytes, cells that provide skin its color and protect against skin damage. The inner layer of the skin-the dermis-is the layer that contains the nerves, blood vessels, and sweat glands.<\/p>\n\n\n\n
Skin cancer is a disease in which cancerous (malignant) cells are found in the outer layers of your skin. There are several types of cancer that originate in the skin. The most common types are basal cell carcinoma (70 percent of all skin cancers) and squamous cell carcinoma (20 percent). These types are classified as nonmelanoma skin cancer. Melanoma (5 percent of all skin cancers) is the third type of skin cancer. It is less common than basal cell or squamous cell skin cancer, but potentially much more serious. Other types of skin cancer are rare.<\/p>\n\n\n\n
Most skin cancers occur on sun-exposed areas of our skin, and there is a lot of scientific evidence to support UV radiation as a causative factor in most types of skin cancer. Family history is also important, particularly in melanoma. The lighter your skin type, the more susceptible you are to UV damage and to skin cancer.<\/p>\n\n\n\n
The vast majority of skin cancers can be cured if diagnosed and treated early. Aside from protecting your skin from sun damage, it is important to recognize the early signs of skin cancer.<\/p>\n\n\n\n
If you notice any of the factors listed above, see your doctor right away. If you have a spot or lump on your skin, your doctor may remove the growth and examine the tissue under the microscope. This is called a biopsy. A biopsy can usually be done in the doctor\u2019s office and usually involves numbing the skin with a local anesthetic. Examination of the biopsy under the microscope will tell the doctor if the skin lesion is a cancer (malignancy).<\/p>\n\n\n\n
There are varieties of treatments available, including surgery, radiation therapy, and chemotherapy, to treat skin cancer. Treatment for skin cancer depends on the type and size of cancer, your age, and your overall health.<\/p>\n\n\n\n
Surgery is the most common form of treatment. It generally consists of an office or outpatient procedure to remove the lesion and check edges to make sure all the cancer was removed. In many cases, the site is then repaired with simple stitches. In larger skin cancers, your doctor may take some skin from another body site to cover the wound and promote healing. This is termed skin grafting. In more advanced cases of skin cancer, radiation therapy or chemotherapy (drugs that kill cancer cells) may be used with surgery to improve cure rates.<\/p>\n\n\n\n
People with any of the factors listed below have a higher risk of developing skin cancer and should be particularly careful about sun exposure.<\/p>\n\n\n\n
The single most important thing you can do to lower your risk of skin cancer is to avoid direct sun exposure. Sunlight produces ultraviolet (UV) radiation that can directly damage the cells (DNA) of our skin. People who work outdoors are at the highest risk of developing a skin cancer. The sun\u2019s rays are the most powerful between 10 am and 2 pm, so you must be particularly careful during those hours. If you must be out during the day, wear clothing that covers as much of your skin as possible, including a wide-brimmed hat to block the sun from your face, scalp, neck, and ears.<\/p>\n\n\n\n
The use of a sunscreen can provide protection against UV radiation. When selecting a sunscreen, choose one with a Sun Protection Factor (SPF) of 15 or more. For people who live in the Southern U.S., a SPF of 30 or greater should be used during summer and when prolonged exposure is anticipated. Sunscreen should be applied before exposure and when the skin is dry. If you will be sweating or swimming, most sunscreens will need to be reapplied. Sunscreen products do not completely block the damaging rays, but they do allow you to be in the sun longer without getting sunburn.<\/p>\n\n\n\n
It is also critical to recognize early signs of skin trouble. The best time to do self-examination is after a shower in front of a full-length mirror. Note any moles, birthmarks, and blemishes. Be on the alert for sores that do not heal or new nodules on the skin. Any mole that changes in size, color, or texture should be carefully examined. If you notice anything new or unusual, see your physician right away. If you have a strong family history of skin cancer, particularly melanoma, an annual examination by a physician skilled at diagnosing skin cancer is recommended. Catching skin cancer early can save your life.<\/p>\n\n\n\n
The new Ultraviolet (UV) index provides important information to help you plan your outdoor activities and avoid overexposure to the damaging rays of the sun. Developed by the National Weather Service and the Environmental Protection Agency, the UV index is issued daily as a national service.<\/p>\n\n\n\n
The UV index gives the next day\u2019s amount of exposure to UV rays. The index predicts UV levels on a 0 to 10+ scale (see chart).<\/p>\n\n\n\n
Always take precautions against overexposure, and take special care when the UV index predicts exposure levels of moderate to above (5 to 10+).<\/p>\n\n\n\n