Sorry to hear about your sister Hal.
My own sister has cancer too, fully treatable and should make a full recovery.
I’ll tell you all, cancer is inside all of us. It just sits there and then something sparks it off.
Pancreatic Cancer took my father a few years ago. Twas caught early enough, but still inoperable and all treatments failed. Man never smoked in his life but was a spray painter. Maybe it was all the chemicals in the paints and stuff that he used that activated his, but then again, he was retired 16 years before the diagnosis.
Maybe it’s what’s in the food these days, too much processed shite we eat if you ask me