The news is that even a milder form of McCain's skin cancer puts patients at increased risk, not just for more skin cancers, but for other cancers as well.
Anthony Alberg and colleagues compared histories of 769 patients with non-melanoma skin cancer to 18,405 who did not have the disease, concluding those with skin cancer ran twice the risk of developing other forms of cancer.
The study accounted for a variety of other risk factors, including smoking, obesity, sun exposure and education. The strongest association came with age, that is, those whose skin cancer showed up earliest ran the highest risk.
McCain has been treated for four melanomas since 1993, meaning he was in his late 50s upon his first diagnosis. He also has a history of basel cell carcinoma. While aides insist he has been cancer free since 2002, it can come back anywhere.
Oh, and this is one thing McCain can't blame on his POW years. It's far more likely the result of Arizona sun exposure, as skin cancer rates among young women have skyrocketed.