Burned by the Sun
Study links five or more blistering sunburns during adolescence to increased adult melanoma risk.
By Marilyn Fenichel
As many parents and grandparents know, getting kids to put on sunscreen is not for the faint of heart. But a new study highlights why it’s worth it to wade through the tantrums and tears.
An Atypical Melanoma
Acral lentiginous melanomas aren't caused by sun exposure and are more prevalent among blacks, Asians, Pacific Islanders and Latinos.
The study, published in the June 2014 issue of Cancer Epidemiology, Biomarkers & Prevention, used data collected from close to 109,000 white women enrolled in the Nurse’s Health Study II, an ongoing prospective study, to investigate the relationship between sun exposure and skin cancer risk.
Between 1989 and 2009, there were 7,835 women who reported having been diagnosed with basal cell or squamous cell carcinoma, the two most common—but least dangerous—types of skin cancer. Women who had the most sun exposure throughout their lives were more likely to be diagnosed with these cancers than were women who had the least sun exposure throughout their lives.
Another 779 women reported a diagnosis of melanoma, the most serious type of skin cancer. The women diagnosed with melanoma were 80 percent more likely to report having had at least five blistering sunburns between the ages of 15 and 20 than were women who had not been diagnosed with melanoma, suggesting that sunburns are especially dangerous during adolescence.
It is not known why intense, high-dose sun exposure during adolescence may increase melanoma risk. One hypothesis “is that while most of the damaged cells die or are repaired, some damaged cells stick around ... [and] become malignant later in life,” says Abrar A. Qureshi, a dermatologist at Warren Alpert Medical School of Brown University in Providence, Rhode Island, who co-led the study.
More than one-third of teens and adults reported a sunburn in the previous year, according to a 2007 report by the U.S. Centers for Disease Control and Prevention (CDC). Other CDC-supported surveys have found that only about 30 percent of children, adolescents and adults use sunscreen on a regular basis. Researchers are studying the best approaches for broadening sunscreen use. For example, a study published in the April 2014 issue of the Journal of the American Academy of Dermatology suggests that appealing to a teenager’s vanity by providing information that links ultraviolet radiation from the sun to premature aging (spots and wrinkles) is more effective than stressing cancer risks.
Hearing about someone else’s experience with cancer is another potential driver for change. Michelle Bain was diagnosed with stage II melanoma in 2010 at age 32. She now travels to schools near her home in Oxford, Alabama, sharing pictures of her tumor before it was removed, and talking about the many sunburns she got as a child and the many hours she spent in tanning beds in her teens and 20s.
“I tell them that at their age, I didn’t know what caused skin cancer,” she says. “I want them to learn from my experience so the same thing doesn’t happen to them.”