<unk>  is a congenital disorder that affects growth, cranial development, hair growth and dental development. There are fewer than 200 people with the syndrome worldwide. One notable organization that is supporting people with<unk>  is the Germany-based "Schattenkinder e.V".
Hallermann–Streiff syndrome
Progeria
Keppen–Lubinsky syndrome
Jervell and Lange-Nielsen syndrome
Shprintzen–Goldberg syndrome
Laron syndrome
Gleich's syndrome
Prader–Willi syndrome