Seriously, check this out: http://en.wikipedia.org/wiki/Whipple_procedure. If you are a visual learner, check the illustration here: http://www.patientedu.org/aspx/HealthELibrary/PrintOnly.aspx...
"A Whipple involves removing the head of the pancreas, the duodenum, the common bile duct, the gallbladder, and often part of the stomach (see illustration). Surgeons then seal off the end of the small intestine and reattach what's left of the bile duct, pancreas (body and tail), and stomach."
It sounds like something Dr. Frankenstein would do.
It is a major rearranging of your guts, with potentially severe dietary restrictions for life.