dr. nayak's most challenging cases at the time was a man named bill brooks. he was 46 years old. >> bill has brain cancer. that basically in his case has led to raised pressure in his head. but he feels really well. bill's sister had also died of a brain tumor, and that was what he was worried of the most. >> how do they look? >> they look delicious. (chuckles) >> they always look delicious. everything is good for you, you eat anything. you know, we're so lucky, we have each other, we have great families, we have great friends, we got great jobs, we live in a beautiful home, we've been lucky. and then, you know, all of a sudden, it's like our world was turned upside down. >> it's a battle. you know, some people say don't listen to the numbers, and i always say, "well that gives me something to shoot for." you know, if they tell you five years, let's go for six, seven, or ten. >> that's good, you were right. >> told you. >> so bill's story from the very beginning has been challenging, because wh