Detailed text transcripts for TV channel - CNN - 20171214:21:29:00
We are back now with the health lead. and it's a tough one. senator john mccain is looking increasingly frail according to three senate sources. five months ago you may remember he was diagnosed with an aggressive form of brain cancer. now his aids say that he's being treated at walter reid medical center for the normal side effects of his ongoing cancer therapy. let's bring in chief medical correspondent sanjay gupta, he treats patients with this type of cancer. doctor, what kind of symptoms are associated with this at that stage of the disease? >> well, you know, what can happen at this stag...