Narrator: This is Science Today. New research from the University of California , San Francisco has revealed that melanomas, the most lethal form of skin cancer, are not all the same. The study, led by Dr. Boris Bastian, a professor of dermatology and pathology, grouped melanomas into four separate categories
Bastian: We looked at tumors that had actually been removed from the patient's skin and we categorized them into four different types based on the degree of sun exposure we saw in the surrounding skin and whether they occurred on special sites on the body.
Narrator: Bastian says this discovery could lead to better melanoma treatments.
Bastian : This data, along with other data that is around for quite some time, suggests that, in fact, we're dealing with several distinct entities. And this is going to become more and more relevant with the advent of more targeted therapies in cancer.Narrator: For Science Today, I'm Larissa Branin.