So, I've kept quiet about this long enough.
Goblin is having exploratory surgery today. He was having some tummy trouble after Thanksgiving. He had several medical appointments and one of them turned up some enlarged lymph nodes in his abdomen. The blood screen for cancer came back negative. Also, he doesn't have a spleen, so any infection can lead to over-active lymph nodes. However, the surgeon he consulted with did not want to wait until after the holidays (which Goblin wanted to do since he has no leave left for this calendar year).
I'm sure this is all an exercise in medical CYA, that it's all traceable to his lack of a spleen and the fact that he's been fighting a recurring skin infection for the last couple of months. However, keep your fingers crossed for him any way.