Widow's peak

A sharp hairline (English Widow's peak, literally translated as " widow peak ") is a descending V-shaped area in the middle of the hairline above the forehead.

The feature of the acute hairline is autosomal dominant. The allele " pointed hairline " dominates the allele " straight hairline ".

The English name Widow's peak is probably a reference to the shape of a worn by widows in the 16th century cap ( Biquoquet ). In English-speaking countries the term is used for both genders.

Syndromes, which are in connection with a widow's peak

While in most cases a pointed hairline is a completely normal genetic trait such as red hair, or had grown earlobes are some very rare inherited disorders with the phenotype " pointed hairline " connected. So there is an obvious relationship between hypertelorism ( long eye relief ) and pointed hairline.

The following syndromes are also associated with hypertelorism is often also the phenotype " pointed hairline " educated:

• The Aarskog -Scott syndrome (X -linked recessive, sometimes autosomal recessive )
• The Cranio- fronto- nasal dysplasia ( CFNS ), ( X-linked dominant gene locus Xq12 )
• The fronto - nasal dysplasia ( sporadic mutations)
• The Waardenburg syndrome (WS1 ) ( autosomal dominant gene locus 2q35 )
• The recessive form of Fazio - genito - digital syndrome ( usually X-linked )
• The Opitz BBB / G syndrome ( autosomal dominant and X -linked recessive )
• The Widow's -peak syndrome (X- linked dominant )