I am in the same circumstances as you guys.
My dad was diagnosed with PC and passed away 6 months later.
If you have anyone over 70 diagnosed with PC, I would say that the best is not to do any operations on the patient (relating to the PC). The fact that PC once diagnosed is most likely at the last stage because early stages rarely shows any symptoms. My dad's symptoms are stomach discomfort and jaundice (due to the cancer blocking the bile duct). What you can do instead is to advise the patient to turn vegetarian and cut out / lessen the sugar intake for the patient. Most cancer cells live just like normal cells but they (the cancer cells) especially thrive on meat proteins and sugar in blood. The more these "nutrients" intake, the faster they will grow. So in order to slow down the growth
For those who are religious, can ask the patient to pray and make peace with themselves and all those around them. The effect is actually to make peace with the cancer cells themselves. It is rarely known that cancer cells are actually present in most if not all creatures. It is only that during the "right" conditions (stress level, hormone changes, dietary, smoking / drinking habits) that the cell will actually trigger to grow and overtake the other normal cells.
My advise is to not be scared by the fact that you (and me included) have a higher chance of PC. Cancer cells are a part of us (including those with lesser chance of PC) so try to live your life the best way you can and do more good deeds while you can. The power of sincere prayers and deeds are not to be underestimated.
Last but not least, treasure those around you.
After all, it matters more how you have lived your life meaningfully rather than how you die, because eventually dying is one of the three certain things in life (growing old, getting sick, death).
Sorry for your loss Bro. For most cases, victims of Pancreatic cancer are age between 60-80 therefore if I were to fall victim, I still have a good 20-40 yrs to go *touchwood*. What puzzles me is we are living in a modern era with so much medical science breakthrough, why they are not able to come out with a early detection tool.
I will live my life to the fullest, dwelling unnecessarily won't make life any better.