The<unk>  is a genetic disorder characterized mainly by obesity, retinitis pigmentosa, polydactyly, mental retardation, hypogonadism, renal dysplasia and renal failure in some cases.
Bardet-Biedl syndrome
Prader-Willi syndrome
Beckwith-Wiedemann syndrome
Smith-Magenis syndrome
Stuve-Weidemann syndrome
Lawrence-Moon syndrome
13q deletion syndrome
Cruveilhier-Baumgarten syndrome