LOU WATERS, CNN ANCHOR: The Democrats here in Los Angeles have a Republican in their thoughts and prayers today. Arizona Senator John McCain has been diagnosed with a serious form of skin cancer. We get the latest on that from CNN medical correspondent Elizabeth Cohen who's in Phoenix, Arizona, today -- Elizabeth.</s>ELIZABETH COHEN, CNN MEDICAL CORRESPONDENT: Lou, Senator McCain left the Mayo Clinic within the past hour, in Scottsdale, Arizona. He was there for about three hours for testing on two new spots of malignant melanoma. He also had melanoma in 1993. These new spots are on the temple and the arm. The tests will figure out the severity of this disease. Melanoma is the most severe form of skin cancer. It's highly curable if caught early on in the earliest stages. However, if it's spread into the lymph nodes or into the organs, then those cure rates go way down -- Lou.</s>WATERS: Elizabeth, you mentioned 1993, was that something that was caught early? is this a different condition? or is that more of the same?</s>COHEN: You know, it's impossible to know. Doctors have told me that they would -- doctors uninvolved with the case have told me that they would guess that these are new -- these are new melanomas, that they're not part of the -- they're not spread from the melanomas in 1993. Of course, that's just a guess, they don't really know. It would be actually better for him if these were new. If they were spread from the melanoma that he had 1993 that means that the cancer obviously is spreading. If they're new, it means that they can catch it early once again.</s>WATERS: All right, Elizabeth Cohen, our best thoughts go with John McCain as he fights this cancer there in Arizona.
Democratic National Convention: McCain Finishes Today's Tests, No Word on Condition