Indoor tanning, already associated with an increased risk for the deadliest type of skin cancer, appears to increase the likelihood for other skin cancers, as well.

Tanning beds lead to more than 170,000 cases of basal and squamous cell skin cancer each year in the United States. And the earlier you start, the worse the odds, researchers say.

"Not only do tanning beds cause melanoma, the most deadly form of skin cancer, but our study shows they also contribute to the most common cancer, basal and squamous cell skin cancer," said lead researcher Dr. Eleni Linos, an assistant professor of dermatology at the University of California, San Francisco.

"We could prevent hundreds of thousands of cancers each year by avoiding tanning beds," she added.

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