After doing a quick bit of research the fatty lumps on a corn dont always go away. They are called lymphomas and now that I think back thats what my vey called them too. Just like in people once fat cells grow they dont disapeer unless you have them removed, like lyposuction. Some people are lucky and can shrink them but others dont. A heavier person can loose alot of weight anf become skinny yet still have areas with fat that can only be surgically removed, those are the lymphomas. Same applies to the snake. You could have him on a diet till he is skin and bones and he may still have the fatty lumps. A vet would have to remove them and thats more hard on the snake then to just leave them and reduce his food intake. My snake isnt planning on being a supermodel so for me to have them removed would only be for cosmetic purposes and I dont plan to put him through that.