<unk> , also known as Prader–Willi habitus, osteopenia, and camptodactyly or<unk>  syndrome, is an extremely rare inherited congenital disorder first described by<unk>  et al. (1979). It is characterized by genital anomalies, mental retardation, obesity, contractures of fingers, and osteoporosis, though further complications are known.
Urban–Rogers–Meyer syndrome
Snyder–Robinson syndrome
Bart–Pumphrey syndrome
Arakawa's syndrome II
Temple–Baraitser syndrome
Nance–Horan syndrome
Nicolau–Balus syndrome
Kleine–Levin syndrome