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Skin Cancer and Melanoma
Southern Californians are blessed with an abundance of warm, sunny
days. The climate makes it a pleasure to live here, but it also
poses health risks. You are exposed to more harmful effects of ultraviolet
(UV) radiation from the sun, increasing your risk for skin cancer
and other skin diseases. More than 50,000 new cases of melanoma
were diagnosed in the U.S. last year. Fortunately, there is a 90-95
percent cure rate for skin cancer when diagnosed and treated early.
Three Types of Skin Cancer
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A macroscopic view of basal cell
carcinoma on the eyelid. |
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A microscopic view of basal cell
carcinoma. |
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A macroscopic view of squamous
cell carcinoma on the nose. |
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Melanoma may appear
on the skin in several different forms. |
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A microscopic view of melanoma. |
Basal cell carcinoma - Common in fair-skinned people.
The tumor usually appears as a small fleshy bump on the head, neck
or hands. These tumors grow slowly and rarely spread to other parts
of the body.
Squamous cell carcinoma - Common in fair-skinned people.
Usually appears as a bump or a red, scaly patch on the face, ear,
lips, or mouth. It can develop into large masses and spread to other
parts of the body.
Malignant melanoma - Most dangerous form of cancer. It
can spread to other parts of the body through the lymphatic system
or the blood. This is the leading cause of all skin cancer-related
deaths.
Are you at risk?
One main risk factor appears to be overexposure to the sun or tanning
booths. People who are exposed to intense sun over a short period
of time (weekend tanners) are more at risk for melanoma than people
who have a consistent daily sun exposure. People with fair skin
who tend to sunburn or freckle easily, especially those with red
or blonde hair are at greater risk. Blistering sunburns during childhood
or adolescence can put people at risk. Melanoma may also run in
families, especially those with a tendency to have many abnormally
sized or shaped moles all over the body.
How is it diagnosed?
To help diagnose skin diseases a dermatologist, family physician
or surgeon performs a skin biopsy. This tissue is sent to the laboratory
for processing. At SCMC, we are fortunate to have a state-of-the-art
laboratory with excellent histotechnologists. They cut the tissue
into extremely thin sections, place them on a glass slide and stain
it. The prepared biopsy slides are given to one of the two dermatopathologists
to interpret. Under the microscope, the dermatopathologist examines
the biopsy in order to provide accurate diagnosis. A pathology report
is forwarded to your physician.
The ABC’s of Melanoma
If you are worried about melanoma, use the following ABC's to do
some self-checks.
Asymmetry - Melanoma lesions are typically irregular in
shape. Benign moles are round.
Border - Melanoma lesions typically have uneven borders,
while benign moles have smooth, even borders.
Color - Melanoma lesions often contain many shades of
brown or black; benign moles are usually one shade.
Diameter - Melanoma lesions are often more than 5 millimeters
in diameter (the size of a pencil eraser); benign moles are smaller.
Evolutionary Change - Documented change of appearance
in the lesion over time.
Prevention
You can help prevent the onset of malignant melanoma by taking
a few precautions.
- Wear a sunscreen with a Sun Protection Factor (SPF) of 15 or
greater
- Avoid the sun between 10 a.m. and 3 p.m.
- Wear wide-brimmed hats and/or other protective clothing
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