My cancer is stage IV in the tail & is not operable. The not operable part is not due to it being in the tail. Mine has shrunk to "no evidence of disease" but the not operable part is due to it has already left the pancreas & metastasized to my lungs. I will always have this cancer. There are times I will have a good CA19-9 and CT scans & can take a break from chemo, but I must be vigilant with following up every three months with those tests to see if it is trying to come back. I wish you & you husband the best. I have been alive for over 2 years now & had a 4 month break & am back on chemo looking forward to my next break!