Hello, and welcome!
Due to your cat's comparatively young age, the radioactive iodine treatment may be a good option for him. Here is more information about hyperthyroidism and all the options you have for the treatment of hyperthyroidism: CLICK
It seems a little quick to jump into surgery at this time, unless your cat has a malignant tumor on his thyroid. Typically, oral medication would be tried first, even if surgery is considered, and there is a food made by Science Diet just for hyperthyroid cats, called Y/D.
Before any procedure requiring anesthesia, certain blood tests are done to determine which kind of anesthesia the individual cat would best tolerate.
I don't think I would rush into surgery at this time, but get more information about the oral medication (and transdermal gel), iodine therapy and hyperthyroid prescription food. Here are more details re: the radioactive iodine therapy, which is only done at certain animal medical centers across the U.S.: CLICK
I hope all will be well with your furry boy and please let me know how he's coming along. Thanks!
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