Yes, but it is not neccesarily a physical weight gain, I know some Dr's will cancel if the liver is to big because it obstructs their view and cause complications. I know alot of people prior to surgery take like a meal replacement to help with liver shrinkage. Have you seen the bariatric advantage meal replacements they are actually scientificaly proven to shrink liver. Here is the link,

Bariatric Advantage - High-Protein Meal Replacement