Skin Cancer

What is skin cancer?

Skin cancer is a malignant tumor that grows in the skin cells and
accounts for more than 50 percent of all cancers. In the US alone,
more than 1 million Americans will be diagnosed in 2007 with
nonmelanoma skin cancer, and 59,940 will be diagnosed with
melanoma, according to the American Cancer Society.

What are the different types of skin cancer?

There are three main types of skin cancer, including:

Distinguishing benign moles from melanoma:

click image to enlarge

To prevent melanoma, it is important to examine your skin on a regular basis, and become familiar with moles, and other skin conditions, in order to better identify changes. According to recent research, certain moles are at higher risk for changing into malignant melanoma. Moles that are present at birth, and atypical moles, have a greater chance of becoming malignant. Recognizing changes in moles, by following this ABCD Chart, is crucial in detecting malignant melanoma at its earliest stage. The warning signs are:

Melanomas vary greatly in appearance. Some melanomas may show all of the ABCD characteristics, while other may only show changes in one or two characteristics. Always consult your physician for a diagnosis.

What are the risk factors for melanoma?

Skin cancer is more common in fair-skinned people - especially those with blond or red hair, who have light-colored eyes. However, no one is safe from skin cancer. Almost half of all Americans who live to age 65 will be diagnosed with skin cancer at some point in their lives, according to the National Cancer Institute. Other risk factors include:

• family history of melanoma

• sun exposure
  The amount of time spent unprotected in the sun directly affects your risk of skin cancer.

• early childhood sunburns
  Research has shown that sunburns early in life increase a person's risk for skin cancer later in life.

• many freckles

• many ordinary moles (more than 50)

• dysplastic nevi

Prevention of skin cancer:

The American Academy of Dermatology (AAD) has declared war on skin cancer by recommending these three preventive steps:

1. Wear protective clothing, including a hat with a four-inch brim.
   
   
2. Apply sunscreen all over your body and avoid the midday sun from 10 a.m. to 4 p.m.
   
   
3. Regularly use a broad-spectrum sunscreen with an SPF of 15 or higher, even on cloudy days.

The following six steps have been recommended by the AAD and the Skin Cancer Foundation to help reduce the risk of sunburn and skin cancer.

1. Minimize exposure to the sun at midday - between the hours of 10 a.m. and 3 p.m.
   
   
2. Apply sunscreen, with at least a SPF-15 or higher that protects against both UVA and UVB rays, to all areas of the body that are exposed to the sun.
   
   
3. Reapply sunscreen every two hours, even on cloudy days. Reapply after swimming or perspiring.
   
   
4. Wear clothing that covers the body and shades the face. Hats should provide shade for both the face and back of the neck. Wearing sunglasses will reduce the amount of rays reaching the eye by filtering as much as 80 percent of the rays, and protecting the lids of our eyes as well as the lens.
   
   
5. Avoid exposure to UV radiation from sunlamps or tanning parlors.
   
   
6. Protect children. Keep them from excessive sun exposure when the sun is strongest (between 10 a.m. and 3 p.m.), and apply sunscreen liberally and frequently to children 6 months of age and older.

Remember, sand and pavement reflect UV rays even under the umbrella. Snow is even a particularly good reflector of UV rays. Reflective surfaces can reflect up to 85 percent of the damaging sun rays.

How to perform a skin self-examination:

Finding suspicious moles or skin cancer early is the key to treating skin cancer successfully. A skin self-exam is usually the first step in detecting skin cancer. The following suggested method of self-examination comes from the American Cancer Society:

(You will need a full-length mirror, a hand mirror, and a brightly lit room.)

• Examine your body front and back in mirror, then the right and left sides, with your arms raised.

• Bend your elbows, look carefully at your forearms, the back of your upper arms, and the palms of your hands.

• Look at backs of your legs and feet, spaces between your toes, and the soles of your feet.

• Examine the back of your neck and scalp with a hand mirror.

• Check your back and buttocks with a hand mirror.

• Become familiar with your skin and the pattern of your moles, freckles, and other marks.

• Be alert to changes in the number, size, shape, and color of pigmented areas.

• Follow the ABCD Chart when examining moles of other pigmented areas and consult your physician promptly if you notice any changes.

Treatments for skin cancer:

• your age, overall health, and medical history
• extent and type of the disease
• your tolerance for specific medications, procedures, or therapies
• expectations for the course of the disease
• your opinion or preference

There are several kinds of treatments for skin cancer, including the following:

• surgery
  Surgery is a common treatment for skin cancer. It is used in most treated cases. Some types of skin cancer growths can be removed very easily and require only very minor surgery, while others may require a more extensive surgical procedure. Surgery may include the following procedures:

• cryosurgery
  Using liquid nitrogen, cryosurgery uses an instrument that sprays the liquid onto the skin, freezing and destroying the tissue.

• curettage and electrodesiccation
  This common type of surgery involves scraping away skin tissue with a curette (a sharp surgical instrument), followed by cauterizing the wound with an electrosurgical unit.

• excision
  A scalpel (sharp surgical instrument) may be used to excise and remove the growth. The wound is usually stitched or held closed with skin clips.

• Mohs' microscopically controlled surgery
  This type of surgery involves excising a lesion, layer by layer. Each piece of excised tissue is examined under a microscope. Tissue is progressively excised until no tumor cells are seen. The goal of this type of surgery is to remove all of the malignant cells and as little normal tissue as possible. It is often used with recurring tumors.

• laser therapy
  Laser surgery uses a narrow beam of light to remove cancer cells, and is often used with tumors located on the outer layer of skin.

• Radiation therapy
  X-rays are used to kill cancer cells and shrink tumors.

• Other types of treatment include the following:
  
  
  • chemotherapy
    Chemotherapy uses drugs to kill cancer cells.
    
    
  • topical chemotherapy - chemotherapy given as a cream or lotion placed on the skin to kill cancer cells.
    
    
  • systemic chemotherapy - chemotherapy administered orally or intravenously (IV).
    
    
  • immunotherapy
    Immunotherapy of melanoma is a complex type of treatment involving various approaches to boost the body's own immune system, helping it to slow the growth of the cancer.

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