Dictionary > Naevus simplex

Naevus simplex

An irregularly-shaped, pink or red, flat birthmark that forms usually on the back of the neck, forehead, eyelids, top lip, or on the knee
Birthmarks are marks on the skin at birth or shortly afterwards. One of the two major types of birthmarks is the vascular birthmark (the other, pigmented birthmark). Vascular birthmarks are those that arise when blood vessels do not form correctly whereas pigmented birthmarks are those that are associated with a localized overgrowth of melanocytes. They include naevus simplex (salmon patches), hemangiomas, and port-wine stains.
Naevus simplex is a birthmark that is irregularly-shaped, flat, and pink or red in color. Because of the pink or red colored patches they are colloquially called salmon patches. They form on the back of the neck, forehead, eyelids, top lip, or on the knee of certain newborns. Those that form on the back of the neck of the newborn are referred to as stork bites. They are capillary malformations and are often temporary, fading typically by the age of 1 to 2 years old. The affected skin area is not thickened and not different from the rest of the body except for the pink or red discoloration.

  • nevus simplex


  • naevus flammeus nuchae
  • hemangioma
  • salmon patch
  • See also:

    You will also like...

    Human Neurology
    Human Neurology

    Human Neurology deals essentially with the nervous system of humans. It also features the various theories put forward b..

    Fossil trilobite imprint in the sediment

    There are more species of insects than any other species combined. This surely illustrates that insects have the selecti..

    An artist's depiction of the origin of amphibians
    Amphibians & Early Reptiles

    Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..

    Thermographic image of face and neck
    Regulation of Organic Metabolism, Growth and Energy Balance

    The human body is capable of regulating growth and energy balance through various feedback mechanisms. Get to know the e..

    Pink Lotus plant on a pond
    Freshwater Lentic Communities & Animals

    This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..

    Crossing Over and Genetic Diversity
    Inheritance and Probability

    Gregor Mendel, an Austrian monk, is most famous in this field for his study of the phenotype of pea plants, including ..