What to know about dangerous ‘black tumor’ cancer that’s spread to Teddi Mellencamp’s lungs and brain

Teddi Mellencamp, daughter of rock legend John Mellencamp, is battling Stage 4 skin cancer that has spread to her lungs and brain. Melanoma is a dangerous form of skin cancer that can quickly metastasize if not detected early. Risk factors include lighter skin, sun exposure, and genetics, but prevention measures such as daily sunscreen and avoiding indoor tanning can help reduce the risk of developing melanoma.

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