Keegan talked to our doctor's nurse today and finally got the official results from Kieran's MRA (for some reason it took over a week for the hospital to fax them over to our pediatrician.)
The results are good. Everything in his brain looks perfect; good blood flow, his brain is developing as it should, no masses.
As happy as we are to receive good news, it doesn't explain the asymmetry. We're not sure what our next steps are because our pediatrician clinic is a father/son team, and we've been seeing the son primarily, but the father was the one who reviewed the results today and told us the news. It'll be the son who decides what our next steps are and he's out of town right now.
So now we wait again. I will update when we have more news!