I just got off the phone with the vet. He thinks that the egg-sized lump under Goliath's neck is a cancerous lymph node. I am going to drop him off Monday morning to have him cut it out. He is also going to check some other cancer hotspots while he is in there. If it is just this huge lymph node then he thinks he will be fine. If he sees cancer in other areas, then it will be time for Goliath to just live out the rest of his life without too much more medical involvement.