Little Tony has CIPA

[samtyr.livejournal.com]

I read this not long ago but now I can't find it. It was probably gen, not too long and complete.

It featured Tony as a pre-schooler and Good Dad Howard. No one thinks anything of the bumps and bruises Tony seems to get, believing it's just part of growing up. It's not until Tony comes walking in on a broken leg (from trying to fly, maybe?) that Howard takes him to the hospital, where Tony proceeds to show everyone in the ER how he can "wiggle his leg all over". It turns out that Tony has CIPA (a rare genetic disorder that makes him unable to feel pain.) Once they are back home, Howard has a long talk with Tony about how important science is and get his interest focused on lab work rather than being more athletic.

FOUND! Link below in comments.

Steve Rogers isn't aging

[ladyhatshepsut.livejournal.com]

I just got through re-reading On Top of the World by Setcheti for about the 20th time, and still loving it.  I wonder if their are any other stories where the serum has caused Steve to stop aging or to become immortal.  How about Bucky and/or Natasha also affect the same by their own version of the serum.  The story A Flaw in My Code by charmingcontender has the same aspect toward the end, where Nat's aging as slowed down to about half normal and Steve and Bucky aren't aging at all, still going strong three decades after Natasha dies of old age and long after the rest of the team.

(Note: the pairings I indicated don't necassarily have to be sexual.)