Kannilee,
My husband had a very tiny tumor (adenocarcinoma) which they removed with a Whipple April 29. He had to wait a month for the surgery because of pancreatitis caused by one of his tests. It didn't seem to affect the outcome. Everything went fine, and he is recovering nicely. He just started some chemo and will have radiation just to be sure it doesn't return. He has been golfing, working out, eating well, etc. since about 5 or 6 weeks post surgery and he is 69 years old. Your dad should do fine.
Nancy J