As we are learning all about the different cancers in school, it makes me think there will never be a cure. When you break it down, cancer itself are mutated cells that multiply and destroy tissue/muscle/etc. The cancer cells are fed mostly by your body's creation of hormones, which your body creates multiple types all the time. Like HuDa mentioned, the survival rate is good if you catch it early and hope to before it becomes malignant (beginning to spread to other organs, again being spread even harder and faster with your body's hormones.) I have lost (practically) my entire maternal side of my family to cancer in some shape or form, so unfortunately I know a lot about the oncology of carcinomas and states of it.
About pancreatic cancer, insulin is most wonderous things the human body can create. It does so much for your proper blood sugar level and digestive system. Once I learned that when you drink a Coca Cola, your body would almost go into a coma because of all the sugars and other chemicals in it. Instead, the receptors in your brain signal the digestive system to hurry up and start storing the sugars immediately, thanks to the insulin. The kidneys have about a million nephrons in each, so as the sugars left over in the blood stream filter through them, you have to think that all those chemicals and body products (such as bile) from that drink do a massive number on the body's filtering and breakdown systems. Where I was going with this is that the pancreas needs to be healthy all the time, or else your body will shut down.