<unk>  <unk>  is a developmental disorder that affects many parts of the body. The major features of this condition include mild to moderate mental retardation, distinctive facial features, sleep disturbances, and behavioral problems.<unk>  affects an estimated 1 in 25,000 individuals.
The syndrome is due to an abnormality in the short (p) arm of chromosome 17 and is sometimes called the 17p- syndrome.
Smith-Magenis syndrome
Lawrence-Moon syndrome
Smith-Lemli-Opitz syndrome
Wilson-Turner X-linked mental retardation syndrome
Bardet-Biedl syndrome
Turner syndrome
Smith Martin Dodd syndrome
Smith–Lemli–Opitz syndrome