The legendary Pat Summitt, head coach of Tennessee's women's basket ball program has early onset dementia.
http://rivals.yahoo.com/ncaa/womens-...summitt_082311
She talks about it on YouTube:
[nomedia="http://www.youtube.com/watch?v=09AF-KMk4Ng"]Pat Summitt's talks about her early onset dementia diagnosis - YouTube[/nomedia]