The Momma here. We got the test results back, and it is cancer. I talked to the vet, and we agreed that surgery or chemo are not real options here due to Casey's age and heart condition. It would be a question of the cure being worse than the disease. The only real option we have is to start him on a course of anti-inflammatories to try to slow the spread of the disease.
I think I've reached my point of a little too much for my mind to cope with right now. I think it's going to hit me harder later, but for now I'm very numb. I'm going to focus on making Casey's time left the very best possible, however much it is. But it is VERY hard handling him and Jessie both being steps away from Death's door at the same time. :\