Well Dr. #2 agrees with Dr. #1 that it is not mumps. He doesn't quite seem to know what it is either though. Some sort of underlying infection, he says, causing things to swell a bit. He showed me Elijah's parotid glands (glands that produce saliva), which would be infected if he had mumps. But they are pink and healthy looking, no inflammation or discharge. Elijah submitted to lots of poking and prodding as the doctor examined him very thoroughly. But he didn't complain at all and once the examining was over, beamed at the doctor and jumped around the examining room.
So, it's NOT mumps, but he looks like a chipmunk just the same. :)