A webbed neck, or pterygium colli, is a congenital skin fold that runs along the sides of the neck down to the shoulders. There are many variants. Signs and symptoms
On babies, webbed neck may look like loose folds of skin on the neck. As the child grows, the skin may stretch out to look like there is little or no neck. Associated conditions
It is a feature of Turner syndrome (only found in girls) and Noonan syndrome, as well as the rarer Klippel–Feil syndrome, or Diamond–Blackfan anemia

References


== External links ==
Amalgam tattoo is a grey, blue or black area of discoloration on the mucous membranes of the mouth, typically on the gums of the lower jaw. It is a healthcare caused lesion, due to entry of dental amalgam into the soft tissues. It is common, painless, and benign, but it can be mistaken for melanoma. Signs and symptoms
Amalgam tattoo usually occurs on the mandibular gingiva, often in an area in which an apicoectomy ("root-end filling") with amalgam was carried out. : 138  After the gingiva, the alveolar mucosa and the buccal mucosa are the next most common sites, although any mucosal site in the mouth is possible. It is painless, and appears as a blue-black or grey discolored macule on the surface of the mucosa. : 138 : 330 : 183  The borders of the tattoo are variable, and may be well defined, irregular or diffuse. Causes
Amalgam tattoo is caused by implantation of amalgam into the tissues. : 183  It may occur in several ways:

During placement of an amalgam filling,: 183  e.g. if abrasions on the mucosa are present which allow entry of amalgam dust
Shortly after placement of an amalgam filling, e.g.