Blue nevus
Blue Nevus
A Blue Nevus (pronounced: /bluː 'niːvəs/), also known as Blue Moles or Dermal Melanocytoma, is a type of melanocytic nevus that presents itself as a blue or blue-gray skin lesion.
Etymology
The term "Blue Nevus" is derived from the Latin word "nevus" which means "birthmark" or "mole", and the color descriptor "blue" which refers to the lesion's distinctive color.
Description
A Blue Nevus is usually less than 1 cm in diameter and is flat or slightly raised. It is most commonly found on the hands, feet, buttocks, or face. The color is due to the melanin being deep in the dermis, rather than in the epidermis or junctional area where moles typically are. This causes the melanin to appear blue due to a light reflection and absorption phenomenon known as the Tyndall effect.
Types
There are two main types of Blue Nevus: the Common Blue Nevus and the Cellular Blue Nevus. The Common Blue Nevus is smaller and darker, while the Cellular Blue Nevus is larger and may have a more variable appearance.
Diagnosis
Diagnosis of a Blue Nevus is typically made through a dermatological examination. In some cases, a biopsy may be performed to rule out melanoma, a type of skin cancer.
Treatment
Treatment is usually not necessary for a Blue Nevus unless it changes in size, shape, or color, which could be a sign of melanoma. If removal is desired for cosmetic reasons or to alleviate worry, it can be removed surgically.
Related Terms
External links
- Medical encyclopedia article on Blue nevus
- Wikipedia's article - Blue nevus
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