<unk>  is a disorder that affects development of the limbs, head, and face. The features of this syndrome are highly variable, ranging from very mild to severe. People with this condition typically have one or more extra fingers or toes (polydactyly) or an abnormally wide thumb or big toe (hallux).
Greig cephalopolysyndactyly syndrome
Ectrodactyly–ectodermal dysplasia–cleft syndrome
Tricho–rhino–phalangeal syndrome type 2
Laron syndrome
Pott disease
Singleton Merten syndrome
Fox–Fordyce disease
Scott syndrome