Melanoma (cont.)
What are signs and symptoms of melanoma?
Often, the first sign of melanoma is a change in the size, shape, color, or
feel of an existing mole. Most melanomas have a black or blue-black area.
Melanoma also may appear as a new mole. It may be black, abnormal, or "ugly
looking."
If you have a question or concern about something on your skin, see your
doctor. Do not use the following pictures to try to diagnose it yourself.
Pictures are useful examples, but they cannot take the place of a doctor's
examination.
Thinking of "ABCD" can help you remember what to watch for:
- Asymmetry—The shape of one half does not match the other.
- Border—The edges are often ragged, notched, blurred, or irregular in outline; the pigment may spread into the surrounding skin.
- Color—The color is uneven. Shades of black, brown, and tan may be present. Areas of white, grey, red, pink, or blue also may be seen.
- Diameter—There is a change in size, usually an increase. Melanomas are usually larger than the eraser of a pencil (1/4 inch or 5 millimeters).
Melanomas can vary greatly in how they look. Many show all of the ABCD features. However, some may show changes or abnormalities in only one or two of the ABCD features.
A skin examination is often part of a routine checkup by a health care
provider. People also can check their own skin for new growths or other changes.
(The "How To Do a Skin Self-Exam" section has a simple guide on how to do this
skin self-exam.) Changes in the skin, such as a change in a mole, should be
reported to the health care provider right away. The person may be referred to a
dermatologist, a doctor who specializes in diseases of the skin.
Melanoma can be cured if it is diagnosed and treated when the tumor is thin
and has not deeply invaded the skin. However, if a melanoma is not removed at
its early stages, cancer cells may grow downward from the skin surface and
invade healthy tissue. When a melanoma becomes thick and deep, the disease often
spreads to other parts of the body and is difficult to control.
People who have had melanoma have a high risk of developing a new melanoma.
People at risk for any reason should check their skin regularly and have regular
skin exams by a health care provider.
Dysplastic nevi
Some people have certain abnormal-looking moles (called dysplastic nevi or
atypical moles) that are more likely than normal moles to develop into melanoma.
Most people with dysplastic nevi have just a few of these abnormal moles; some
people have many. People with dysplastic nevi and their health care provider
should examine these moles regularly to watch for changes. (Additional
information about moles and dysplastic nevi and melanoma risk is available in
the NCI booklet What You Need To Know About™ Moles and Dysplastic Nevi.)
Dysplastic nevi often look very much like melanoma. Doctors with special
training in skin diseases are in the best position to decide whether an
abnormal-looking mole should be closely watched or removed and checked for
cancer.
In some families, many members have a large number of dysplastic nevi, and
some have had melanoma. Members of these families have a very high risk of
melanoma. Doctors often recommend that they have frequent checkups (every 3 to 6
months) so that any problems can be detected early. The doctor may take pictures
of a person's skin to help show when changes occur.
Next: How is melanoma diagnosed? »
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