welcome to healthcaremagic
Mass in pancreas
can be due to different cause. It is early to jump into conclusion that it is a cancer.
Only after undergoing biopsy
he will have the definitive diagnosis. It is better to plan treatment after that.
Even if it turns out to be cancer; if it is 1" and no other spread; surgery is the recommended treatment. Weather to go for stenting first or surgery will depend on severity of his condition and will be sorted out by your cardiologist and oncologist