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Melanoma/Skin Cancer Health Center

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Melanoma Cases on the Rise

Researcher Says Increase in Melanoma Cases Isn't Just Due to Better Screening
WebMD Health News
Reviewed by Laura J. Martin, MD

March 9, 2010 (Miami Beach, Fla.) -- While some researchers suggest the rising rates of melanoma may simply reflect a change in how doctors diagnose melanoma and the increased availability of skin cancer screenings, a leading dermatologist says the increase is real.

The average American's risk of developing melanoma in his or her lifetime increased from one in 1,500 in 1930, to one in 250 in 1980 and one in 74 in 2000, says Darrell S. Rigel, MD, clinical professor of dermatology at New York University Medical Center in New York City and a past president of the American Academy of Dermatology.

By 2004, a person had a one in 65 chance of getting the deadly skin cancer and now that risk is one in 58, Rigel says.

"If this rate continues to rise at the same pace, the risk will be one in 50 by 2015," he tells WebMD.

A total of 68,720 Americans were diagnosed with melanoma in 2009, compared with 47,700 in 2000, according to the CDC.

At the American Academy of Dermatology's annual meeting here, Rigel dispelled what he calls myths about the rise in melanoma.

Is Rise in Melanoma Due to Increased Surveillance?

Some studies have attributed the rise in melanoma to an increase in the number of skin cancer screenings.

If this was true, "you would expect cases to pop up earlier, and then suddenly drop off," Rigel says.

Take prostate cancer, for example, he says. There was a steep rise in prostate cancer diagnoses in the early 1990s, when testing for prostate specific antigen (PSA) was introduced, Rigel says. Rising PSA levels may signal prostate cancer.

Then, prostate cancer rates dropped dramatically from 1992-1995, after which they leveled off, he says.

"Until PSA testing was introduced, we had no way to detect early prostate cancers, before symptoms developed. With PSA testing, there was a transient increase in case due to increased detection of preclinical (before symptoms) disease. But once those initial cases of prostate cancer were found, it was not diagnosed as often," Rigel says.

Although skin cancer screenings became more readily accessible in the 1980s, no such trend is occurring with melanoma rates, Rigel says.

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