Connection between Sun Exposure and Skin Cancer

The US Surgeon General recently came out with a warning on skin cancer, claiming that the sun is dangerous and that you need to stay away out of it.

November 16, 2014 | Source: Mercola.com | by Dr. Mercola

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The US Surgeon General recently came out with a warning on skin cancer,1 claiming that the sun is dangerous and that you need to stay away out of it.

Dr. John Cannell, founder of the Vitamin D Council, has dedicated a large part of his professional career to the study of vitamin D and its health benefits, and he has a warning of his own to those who take this narrow-minded advice to heart.

It’s worth noting that the acting Surgeon General, Boris Lushniak, is a dermatologist. And of all the medical specialties out there, dermatologists are clearly the most biased against sun exposure, and as a result, against vitamin D.

This isn’t surprising, since they primarily see the ill effects of sun overexposure. But in taking an overly narrow view, the advice to avoid sun exposure as much as possible can have equally if not greater adverse health effects.

The Connection Between Sun Exposure and Skin Cancer

Unquestionably, UV radiation can be dangerous; it can increase your risk for certain skin cancers such as squamous cell, basal cell, and melanoma. But there are significant differences even between these cancers, and appropriate sun exposure may actually be more beneficial than detrimental in some cases. Dr. Cannell explains:

“Squamous cell carcinoma is clearly associated with chronic sun exposure. It is more common on the face, the hands, and the scalp.

It is related to radiation burden over your lifetime, and together with basal cell carcinoma, which is sort of intermediate, it accounts for approximately 1,500 deaths a year in the United States…

Basal cell is sort of intermediate. There are studies showing that it is associated with chronic sun exposure, and there are studies showing that it’s not associated with chronic sun exposure.

And then there’s melanoma, which is responsible for almost 9,000 deaths a year and is the deadly skin cancer that is feared. The relationship that melanoma has with the sun is quite complicated.

It is clearly associated with sunburn, especially sunburns when you’re young (that’s incontrovertible) or sunburns in a sun tanning bed.”

However, there are at least two studies showing that melanoma is more common in indoor workers than outdoor workers. And the most likely places for melanoma to appear are actually NOT the face and the hands like squamous cell carcinoma, but rather the lower back and the upper leg-areas that are usually not chronically sun-exposed.

According to Dr. Cannell, there’s a vocal minority in the dermatological community that thinks the emphasis dermatologists have on avoiding sun exposure is wrong, because while sunburn is a risk factor, chronic sun exposure is not.