Dad had his last surgery - to remove the source of the trouble, his thyroid. They found more tumors, two of them inoperable.
So now we rely even more than before on prayers, and on radiation, and Iodine 131, which will make my Dad a temporary nuclear hazard - Mom will only be able to share a room with him for an hour out of each 24 - but there is a chance it will find and kill all the rogue thyroid cells.
The immediate issue is the surgery made it hard for Dad to swallow. So if you like really concrete prayer requests, that would be a helpful one.