dr. kathy yang is one of his doctors, and she joins me this morning from washington. good morning. thanks so much for joining us. kathy, i know you can't speak specifically to herman cain's case due to privacy laws, he's written about this. generally speaking, colon cancer is the third most common cancer. he had stage four specifically. when you first heard that what are the odds for someone like him? what makes a difference in his survival? >> well what really makes a difference here is, number one, how extensive the disease is. in his case, as well as in other patients, there are those individuals that can undergo surgical resection. and that's a decision made between a group of doctors. usually a medical oncologist, a surgical oncologist, and sometimes if the tumor is still intact in the colon and rectum, a colorectal surgery. so it's looking at ct scans, x-rays, everything else, looking at the patient as a whole and making a decision upon whether or not they can or cannot be surgical resected. that's really the way to cure the patient. >> my understanding is that he had chemoth