disfigurement

I've been really interested in the idea of disfigurement lately, in the psychological sense.  I want one of the characters in the next thing I write to be disfigured.  There is a little boy I know who basically has two giant fingers instead of a left hand.  I don't really know what to think about it, but watching him pick things up makes me reconsider how my hands function.

Does anyone know anything that could help me out?  (you don't have to join anything to comment)