have. >> gretchen: now here is what's not recommended and people will be startled by some of this information. starting with a screening for prostate, ovarian, bladder, lung, skin, oral, pan cratic and testicular cancers. the two that jump out at me right away are prostate and skin. why not? >> in the case of prostate cancer, that's the most controversial. this is a blood test. a lot of men are up at sports stores or athletic events, mobile vans thinking they'll just have their blood tested for prostate cancer. >> gretchen: i've been telling my husband to do it. what are you going to say? >> you need to realize that once they have that test, if it's positive, it's going to be very hard to weigh what you should do before they have the test, they need to know that of the 1,000 men who have a positive test, about one will have their life saved. three will have serious complications from the