Can trauma cause the tail and body of the pancreas to disappear?

My husband has been having left upper quadrant pain that radiates to his back.  He gets weak and has clammy sweats and vomits within a half hour after eating anything with fats, including fish oil capsules and good fats like nuts.  After ruling out heart problems, they did a ct scan and it came back normal, except that the tail and body of his pancreas is missing.  Missing?  What causes that?  A year and a half ago he got hit really hard in that area by a cow and it caused a huge bruise that lasted more several months.  He did not go to the dr at that time.  He did not start these symptoms until a few months ago.  Could that injury cause his pancreas to dissolve and be the source of his problems?

[CalGal]

Did they say the tail and body are actually missing or that they''re not able to be seen due to the presence of other organs or gas within the bowel?