Um, hello?

Hepatitis? Excuse me? No, it's not hepatitis... for a start, his liver looked entirely normal; that should give you a BIG clue that it's nothing to do with his liver. Unless, of course, you didn't read the case at all and just skipped to the end - in which case, you deserve to start again.

Why don't you go back to the case history? (and please read it this time...)