I'm positive that Wylie and you are going to prove the vets wrong! He's got the bestest Mommy in the world, and that's pretty powerful

Vets and doctors usually give the "worst case scenario"

That way, when the patient outlives the prognosis time, they can take credit for it

You caught this right away, so it's not like he suffered with it for a while, with no treatment. I think that seriously gives him the best chance at a long, happy life
Hugs to you, Wylie, and that little cutie dude Marcel