I graduated from undergrad in 2007 with around a 2.7 GPA. I very much would like to attend a top-10 MBA Program, if at all possible. Would it be worth mentioning that I recently discovered that I have ADHD, which is a substantial reason for my poor grades? My hesitancy is that if I include an addendum about ADHD, I don't want my application to be labeled as "another underachiever who is trying to explain away their grades using ADHD."
When I discovered I had ADHD my last year of undergrad, I was able to earn a 3.7 GPA for that year. Furthermore, I will be graduating from law school (top-40 school) cum laude this semester; I was able to pull cum laude even though I was working full-time throughout school and co-founded a company that has raised $2MM in venture capital. These facts demonstrate great improvement, much of which is due to symptom management.
Lastly, I do have a "fall-back" - I was a two-sport varsity athlete (Track and Football) at a major D-1 university. My thought is that if ADHD should not be mentioned, at least I can say I used to be a dumb jock; good or bad idea?