We got news from the Statesman's kidney testing.
The bad news: he only has one functional kidney. The other one is a tiny sliver of renal cortex and a whole bunch of cysts, and it doesn't produce any urine.
The good news: The other kidney has EXCELLENT function, according to the doctor, and there is NO evidence of obstruction and NO reflux, which means he will not need surgery.
The urologist recommends further testing in six months, but as far as I'm concerned, this has moved from the category of "serious defect" to "interesting fact to share at cocktail parties." No contact sports (unless you count growing up with two brothers a contact sport), but I didn't want him to play football anyway.
And as one final thought: do you know for sure that you have two kidneys? Think about that one for a little while...