<unk>  is diagnosed by clinical examination of a person with a severe developmental disability and intellectual impairment. The face is often long and myopathic. Overgrown gums become apparent in late childhood. The finger and toenails are characteristically small, with complete or almost complete absence of the nails of the thumb (pollex) and great toe (hallux).
Temple–Baraitser syndrome
Catel–Manzke syndrome
Neu–Laxova syndrome
Nance–Horan syndrome
Parkes Weber syndrome
Bart–Pumphrey syndrome
Valentino's syndrome
Nicolau–Balus syndrome