<unk>  is a medical condition with an unknown cause that shows symptoms of short stature, congenital optic atrophy and brachytelephalangy. This condition is extremely rare with only two cases being found.
Berk–Tabatznik syndrome
Townes–Brocks syndrome
Fryns-Aftimos syndrome
Bannayan–Riley–Ruvalcaba syndrome
McKittrick-Wheelock syndrome
Cortes Lacassie syndrome
Teunissen–Cremers syndrome
Barakat-Perenthaler syndrome