The incidence of melanoma — the deadliest form of skin cancer — has doubled over the past three decades in the United States, and it will continue to increase unless we change our sun-worshipping ways.
It’s particularly sobering here in Minnesota, which has one of the highest melanoma incidence rates in the country.
The CDC study found that in 2011, the latest year with complete data, the melanoma incidence rate was 22.7 per 100,000 Americans, up from 11.2 per 100,000 in 1982.
In 2011, 65,647 cases of invasive melanoma were diagnosed in the U.S. and 9,128 people died from the disease.
More than 90 percent of melanoma cases are caused by exposure to ultraviolet (UV) radiation from the sun or tanning beds.
Unless people adopt more preventive measures, the incidence rate will continue to increase over the next 15 years, and the number of newly diagnosed cases will reach 112,000 annually by 2030, the CDC report stresses.
And that will mean about twice as many deaths. The death rate from melanoma is 2.7 per 100,000 Americans.
“The rate of people getting melanoma continues to increase every year compared to the rates of most other cancers, which are declining,” Dr. Lisa Richardson, director of the CDC’s Division of Cancer Prevention and Control, said in a released statement. “If we take action now, we can prevent hundreds of thousands of new cases of skin cancers, including melanoma, and save billions of dollars in medical costs.”
Treating newly diagnosed melanomas cost $457 million in 2011, a figure that will climb to $1.6 billion in 2030 — again, unless people’s habits change.
Most at risk
The melanoma incidence rate is by far the highest among non-Hispanic whites — 24.6 cases for every 100,000 people. Blacks have the lowest rate (1 case per 100,000 people), along with Asians and Pacific Islanders (1.3 cases per 100,000 people). Slightly higher are the rates for American Indian/Alaska natives (4.3 cases per 100,000 people) and for Hispanics (4.1 cases per 100,000).
Yet, although black populations have the lowest incidence rate, melanoma survival is poorest among African-Americans who develop the cancer on non-sun-exposed skin. The reasons are unclear, say CDC officials, but it may be due to later diagnosis (perhaps because both patients and physicians having a lower perception of the perceived risk among African-Americans) or the type of melanoma that they develop.
Among people aged 15 to 49, higher melanoma rates occur among women — probably, the CDC report says, because young women are more likely to engage in indoor tanning. Other research has shown that about a third of non-Hispanic white women between the ages of 16 and 25 use indoor tanning at least once a year.
Among people over the age of 50, the melanoma incidence rate is highest among men. This may be because men spend more time outdoors throughout their lives and are less likely to use sunscreen, the CDC report says.
In Minnesota, as in the rest of the country, melanoma has been on the increase over the past three decades. In 2011, the incidence rate dipped slightly from the previous year, but it was still high: 32.2 cases per 100,000 men and 24.3 cases per 100,000 women, according to the Minnesota Department of Health.
That gave us the fifth-highest melanoma incidence rate among all 50 states (behind Utah, Vermont, Delaware and Idaho).
And here’s a truly disturbing figure: Melanoma is now the most common cancer diagnosed among Minnesota adults aged 20 to 34.
We are, however, among the states with the lowest death rate from melanoma — 2.5 deaths per 100,000 people. That may be due to earlier diagnosis and better access to treatment. Hawaii has the lowest death rate (1.1 deaths per 100,000 people) and Wyoming has the highest (4.0 deaths per 100,000 people).
Taking preventive steps
A comprehensive skin cancer prevention program — one that gets people to reduce their UV exposure from sunbathing and indoor tanning and to use more sunscreen and other protections — could result in 230,000 fewer people developing melanoma and save the country $2.7 billion in initial year treatments costs from 2020 to 2030, according to the CDC report.
As the report points out, Australia initiated just such a program, called SunSmart, in the state of Victoria in the late 1980s. “SunSmart was estimated to prevent more than 9,000 melanomas, avert over 1,000 deaths, and save 22,000 life-years in the state of Victoria during 1988-2003,” write the CDC officials. “SunSmart has also been shown to save $2.30 for every $1 invested.”
Australia has since expanded that public health initiative to include the entire country.
A similar comprehensive intervention program here in the United States — one that combines education, mass media campaigns and policy changes — would also save lives and money, say CDC officials.
But such a campaign would need funding, and the budgets for the CDC and other federal health agencies is being slashed, not increased, these days.
The report was published in the June 2 issue of the CDC’s Morbidity and Mortality Weekly Report (MMWR).