I can't believe they told your dad to come 5 years later. My mom has stage 4 gall bladder cancer as well. She was diagnosed January 2008 and has been through 5 different chemo regimens. She has also been taking natural supplements as well as drinking juice every morning that consists of watercress, spinach, brocolli, cauliflower and maybe some other vegetables that I can not remember.
We went to 3 doctors in the beginning and the only gave her 6 months to live. Chemo was the only option for us because we want to do anything to keep her here with us. I knew my mom was strong was strong enough to take the chemo and thats why we decided to go for it. Her first 3 months of chemo she was feeling great and her maerkers were going down. After the 3 months the first treatment wasn't functioning and they changed it. The next two months weren't so good. She was weak and nauseaus, but overall I think she did well. That treatment wasn't working on her so she has been under a new treatment since September and so far she is doing great.
I think a lot of what helps my mom get by is the emotional support. Also, the natural juice she drinks every morning helps cleanse her system and she's been so good with her diet. I don't know how realistic it is that she will be cancer free because this cancer is so rare and the survival rate is not high, but I am thankful she has been here 10 months more than 6. We are still hoping that there will be a positive outcome to this.