Pterygium colli deformity (well what I meant was - Webbed Neck!)

Congenital skin fold that runs along the sides of the neck down to the shoulders. 

This is seen in Turner syndrome and Noonan syndrome, and  Klippel-Feil syndrome

In the newborn period, webbed neck is the loose folds of skin on the neck. 
As the child grows, the skin may stretch out to look like there is either a very short neck or no neck at all.

A 12-year-old female with Noonan syndrome exhibiting a typical webbed neck.
Picture courtesy: Wiki commons