Charlie had his endoscopy today. Ted just called, he made it through the GA well, his heart was strong and good throughout, he said he's a good, strong cat.
It's his thyroid. It's grown substantially in a very short amount of time. It's compressing his trachea. I noticed a tiny lump on his throat a couple of weeks ago and Ted said it was likely from where they took blood, to keep an eye on it. In the last two weeks it's grown larger, so I asked him to look at that today as well. Turns out it's connected to the thyroid goitre he's had for a couple of years (hyperthyroidism is caused by a usually benign tumour on the thyroid), which has grown. That it's grown so much just in a couple of weeks is a very worrying sign. First, because why has it grown (i.e. is it cancerous?), and second it means it likely has a good blood supply, which will make removing it very difficult.
He's referring us to the specialist (who is miles and miles away, I don't drive), who will be far better placed to be able to remove it. It will probably make sense to admit him there, so they can do everything they need (whether advanced CT imaging to check its placement and how integrated it is, or whatever else) and the removal in one trip rather than me having to work out how to get him there and back several times. I expect it's rather urgent and will be done in the next few days, or by the beginning of next week at the latest, if it's still growing so much.
Worst case scenario: They can't remove it because it's too difficult, it continues to grow, it hastens the end of his life because he can't breathe and/or has cancer.
Not great but not worst case scenario: They can remove it, they test it, it's cancerous, he has to have chemo, it may or may not spread; his hyperthyroidism will be cured.
Best case scenario: They can remove it, they test it, it's benign; his hyperthyroidism is also cured.
I can go and pick him up at 3pm. HIs throat is still a bit inflamed, we'll be continuing with the steroids. Ted also removed a cyst from his back leg, so I've got to make sure he doesn't lick it.
When Charlie was first diagnosed with hyperthyroidism, Ted advised us to have the thyroid removed. We elected not to, because we were worried about surgery complications at his age, and we had no problems giving him tablets. You can imagine how I feel now. Please, if your cat develops hyperthyroidism, fully investigate if removing the thyroid (or having the iodine treatment) is the right choice for your cat. What's happening to Charlie is apparently very rare, but I know if this happens with any of my future cats I'll be electing to take it out immediately.