Has anyone been able to have surgery for tumor in the tail?

Has anyone been able to have surgery for tumor in the tail of the pancreas, stage 4, metastasized to the lymph nodes. My husband's oncologist says that sugery isn't an option ever for him. Just chemo every two weeks until folfirinox doesn't work or becomes too toxic. Then some other chemo mix, then … Is this true? This is so discouraging. If the tumors shrink, can't they do more? My husband has had the cancer go into his lymph nodes close to his kidney and the pressure was closing the tube connecting to his bladder, and now has a stint in place to keep kidney function, which it has done.

We have an appointment with the Mayo Clinic in Rochester in August. My husband just had his 4th treatment and will be having a PET scan the end of July. Other than this, he has been extremely healthy, no bad habits, exercises everyday, and eats clean. This is just a huge punch in the gut, as I'm sure is everyone's experience.