Skin Cancer and Sun Damage (cont.)
What are the symptoms of skin cancer?
The most common warning sign of skin cancer is a change on the skin,
typically a new mole or skin lesion or a change in an existing mole.
- Basal cell carcinoma may appear as a small, smooth,
pearly or waxy bump on the face ears and neck; or as a flat, pink/red- or
brown-colored lesion on the trunk or arms and legs.
- Squamous cell carcinoma can appear as a firm, red nodule, or as
a rough, scaly flat lesion that may itch, bleed and become crusty.
Both basal cell and squamous cell cancers mainly occur on areas of the skin
frequently exposed to the sun, but can occur anywhere.
- Melanoma usually appears as a pigmented patch or bump. It may
resemble a normal mole, but usually has a more irregular appearance.
When looking for melanoma, think of the ABCD rule that tells you the
signs to watch for:
- Asymmetry—the shape of one half doesn't match the
- Border—edges are ragged or blurred
- Color—uneven shades of brown, black, tan, red, white
- Diameter—a significant change in size (greater than 6mm)
How is skin cancer diagnosed?
Skin cancer is diagnosed only by performing a biopsy. This involves
taking a sample of the tissue, which is then placed under a microscope
and examined by a dermatopathologist, or doctor who specializes in
examining skin cells. Sometimes a biopsy can remove all of the cancer
tissue and no further treatment is needed.
How is skin cancer treated?
Treatment of skin cancer is individualized and is determined by the type of skin cancer, its size and location and the patient's preference.
Standard treatments for non-melanoma skin cancer (basal cell or
squamous cell carcinomas) include:
- Mohs surgery (for high-risk non-melanoma skin cancers)—excision of cancer and some extra tissue
- Electrodesiccation and curettage—physically scraping
away the skin cancer cells followed by electrosurgery
- Cryosurgery or freezing
- Laser therapy
- Drugs (chemotherapy,
Standard treatments for melanoma skin cancer include:
- Wide surgical excision
- Sentinel lymph node mapping (for deeper lesions)—to
determine if the melanoma has spread to local lymph nodes
- Drugs (chemotherapy, biological response modifiers)
- Radiation therapy
- New methods in clinical trials are sometimes used to treat skin
How can I help prevent skin cancer?
Nothing can completely undo sun damage, although the skin can
sometimes repair itself. So, it's never too late to begin protecting
yourself from the sun. Your skin does change with age—for example,
you sweat less and your skin can take longer to heal, but you can delay
these changes by staying out of the sun. Follow these tips to help
prevent skin cancer:
- Apply sunscreen with a sun protection factor (SPF) of
15 or greater 30 minutes before sun exposure and then every few hours
- Select cosmetic products and contact lenses that offer
- Wear sunglasses with total UV protection.
- Avoid direct sun exposure as much as possible during
peak UV radiation hours between 10:00 a.m. and 3:00 p.m.
- Perform skin self-exams regularly to become familiar
with existing growths and to notice any changes or new growths.
- Eighty percent of a person's lifetime sun exposure is acquired
before age 18. As a parent, be a good role model and foster skin
cancer prevention habits in your child.
Reviewed by the doctors at The Cleveland Clinic, Department of Dermatology.
Reviewed by Cynthia Dennison Haines, MD, on April 1, 2005.
WebMD Medical Reference
Last Editorial Review: 11/20/2007