Since Most Skin Cancers Are Sun-Related, OC Residents Need to Understand
How to Prevent and Treat Them
The very thing that makes Southern California such an attractive place
to live—year-round sunshine—poses a health threat to people
who enjoy outdoor living.
Many forms of skin cancer are associated with long-term sun exposure, according
to the American Cancer Society, which is why Orange County residents need
to protect themselves from the sun’s rays and recognize the signs
of skin cancer.
Basal cell carcinoma
“The most common form of skin cancer is called basal cell carcinoma,” says
Hong T. Nguyen, MD, a dermatologist with
Mission Heritage Medical Group in Mission Viejo. “We see this on the head, neck, ears, face, upper
chest, arms — and for women, the legs.”
“Look for light pink growths that bleed and scab, and gradually expand,”
says Dr. Nguyen. Basal cell carcinoma arises from the deepest layer of
the skin, and is treatable. “For the most part, these are generally
not the type to metastasize to lungs or lymph nodes,” she says.
Lesions are often treated with Mohs surgery, in which very thin layers
of skin with cancer are removed and examined on the spot—an outpatient
procedure with local anesthetic. “They take a look at the very thin
margins of skin around the cancer, to make sure if edges are clear —
if not, they go back and take more slivers,” says Dr. Nguyen. “The
goal is to remove the tumor with as small a margin as possible.”
Squamous cell carcinoma
“The second most common skin cancer is called squamous cell carcinoma,”
says Dr. Nguyen, and it, too, is linked to chronic sun exposure. These
lesions arise from the top layer of the skin and often evolve from actinic
keratosis—a sun-related precancer that appears on the face, scalp,
ears, back of hands, forearms and chest, explains Dr. Nguyen. “Pink
scaly lesions start out thin but then get thicker and thicker and eventually
become a squamous cell carcinoma.”
These patches also can be removed by freezing them or with Mohs surgery,
says Dr. Nguyen.
About 90 percent of Dr. Nguyen’s patients have basal cell or squamous
cell carcinomas, and only about five percent of her patients have developed
melanoma, the most dangerous form of skin cancer. People who have had
melanoma are at higher risk for developing another melanoma or another
type of skin cancer, according to the American Cancer Society.
“Melanoma presents as ill-defined, dark brown, multiple-colored patches
and bumps,” says Dr. Nguyen. Early stages of it are treated with surgery.
To see photos of all skin cancers, visit The Skin Care Foundation at skincancer.org.
Who gets skin cancer?
Skin cancer is a major concern in the U.S. Each year more than 5.4 million
cases of non-melanoma skin cancer are treated, according to a study reported
in the JAMA Dermatology.
Risk factors include being fair-skinned, fair-haired, having blue eyes
and having had severe sunburns in the past. Anyone who spends a lot of
time in the sun is at high risk of skin cancer, too. “This means
PE teachers, construction workers, gardeners — it doesn’t
matter what their skin type,” adds Dr. Nguyen.
Yearly visits to a dermatologist are a must—and people who’ve
had any forms of skin cancer should go twice or three times a year, or
more, she says.
When outside, always wear a hat and long-sleeved UV-rated clothing, advises
Dr. Nguyen. Don’t use tanning beds and do use sunscreen—every
day. “SPF 15-30 is fine,” she says. “If you’re
outside for an extended period time or out playing sports, then go for
SPF 50 or higher.” Look for broad-spectrum sunscreen that protects
against UVA and UVB rays. As for ingredients? “Look for zinc oxide
and titanium dioxide,” she says.
(This story originally appeared in OC Catholic, October, 2016)
Learn more about
Dr. Nguyen. Learn more about
Mission Heritage Medical Group.