In this case, they take the pancreas head, the duodenum, the gall bladder, maybe the stomach pylorus, and the bile duct. (Sounds like the stomach was involved, but maybe they just took the pylorus, which is the surgeon’s call at the time.) They then attach the body-tail of the pancreas to the top of the small intestine, below that a new bile duct, and below that the stomach. It sort of reverses the sequence from the natural state.

The larger question is post surgery chemotherapy. If that wasn’t the protocol, why?