I'm not sure if it's a disease as such
but microcephalic primordial dwarfism.

Awwwww:

anthropologynet.files.wordpress.com/2008/01/primordial-dwarfism.jpg
( Captain Wow currently being a cunt in Infamous, Thu 11 Jun 2009, 16:13, archived)

Fake
She's just really far away.
(King Baby Duck more than a ceiling, Thu 11 Jun 2009, 16:16, archived)