[Q] mechanism of formation of pancreatic tail cancer?

[Han Bok Kim]

I have a cancer patient who is suspected and diagnosed to have 
hepatic and splenic metastasis from pancreatic tail cancer.
They say most of pancreatic cancer is from its head not tail.
For the patient of 70, operation is impossible, and even chemo-
therapy is also not recommended. Is there any possible treatment
in this case? 
Does any molecular biologists of pancreatic cancer have information
about this and effective treatment for this case?
 I need your help, thank you in advance!