Linus went for a check-up yesterday. He had a full exam, and blood and urine work-ups.
Things are mostly okay -- his blood pressure is a little high and his meds are being adjusted slightly to compensate. Otherwise, he is fine.
Except... it looks like a tooth has to come out. The root of one of his lower fangs is showing signs of being absorbed into his body, basically turning to bone. This is something that is not uncommon in cats and it will become very painful if left alone. (Interestingly, the vet noted that occurrences of this condition are on the increase. I'm sure it's nothing to do with the poisons we pump into our environment.)
If the condition is farther along, that is if a lot of his root has become bone, the procedure for removing the tooth is fairly simple: lop it off and sew up the wound. If it's still early on, then they're going to have to go digging for the root. Ouch.
So the plan for now is to adjust his BP meds and recheck him again in two weeks. If his pressure goes down back to the normal range, then we'll schedule surgery for his toothectomy.