<unk>  (RTS), is a rare autosomal recessive skin condition. There have been several reported cases associated with osteosarcoma. A hereditary basis, mutations in the DNA helicase RECQL4 gene, causing problems during initiation of DNA replication has been implicated in the syndrome.
Rothmund–Thomson syndrome
Weismann-Netter–Stuhl syndrome
Schinzel–Giedion syndrome
Bardet–Biedl syndrome
Smith–Magenis syndrome
Langer–Giedion syndrome
Beckwith–Wiedemann syndrome
Marshall–Smith syndrome