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12 different words and then have the person look at that list of words and then try to memorize them over time and repeat them back five times. that was the secretary test. pep scan, memory test, if you did both those tests together and someone did not perform well, they had a 12 times more likely -- 12 times more likely to get alzheimer's disease within two years. this was -- as john mentioned, very important because that's the goal. trying to figure out who out of these people is most likely to develop alzheimer's. >> what is the benefit, sanjay, of finding out who is most likely to develop ...

Is most likely to develop. what you are looking at is a pet scan. it is an expensive test. $3,000 to $6 thousand. you notice suggest changes in someone that's going to develop alzheimer's. greener here as compared to here. >> what does that mean? >> glucose in the brain the way it is metabolized is different than someone else that has alzheimer's versus someone that has mild cognitive changes. that's a good predictor. if you combine that with a simple memory test, list of 12 words, ask someone to repeat them back five times, combine those two tests, it could -- abnormal 12 times roughly more l...

Us, chief medical correspondent dr. sanjay gupta live from atlanta. thanks for being with us. you know, a lot of people are interested in finding out whether they can tell early on which round of testing seems to work the best. >> no question. lot of people looking into this exact question. what they specifically are answering here, people with mild cognitive impairment think of that as confirmed memory loss. who is most likely to go on to develop alzheimer's disease. all sorts of different tests out there. what they found it was a combination of two tests. in particular, that were the best pr...

Threatening can be quite difficult to get through. bone and joint pain, conversatio conversations city pags, nauseousia. hepatitis and kidney inflammation and lung inflammati inflammation. the good news that we're hearing is that based on the pet scan that he had done to tumor stage, to see how extensive the disease, is how many metastecis there are. and he will get more localized as opposed to having to do whole brain radiatioradiation. as hallie mentioned earlier he's getting this new drug, a pd-1 inhibitor and known as an immune checkpoint. these are basically molecules that we actually hav...

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