What would you do at this point? (Pre-diagnosis)

My dad (67) was just admitted to the hospital with his primary symptoms as constipation and abdomen pain. ER diagnosed pancreatitis. MRI just showed mass in pancreas that appears to have spread to the liver. He has a history of drinking heavily and smoking. Even though we don’t have a confirmed diagnosis, I’m feeling the writing on the wall at this point.

What did you or have you done in early stages of diagnosis that you would do again? What didn’t you do that you wish you would have done?

Update: Confirmed Stage 4. Waiting to hear treatment options.