A mole or melanocytic naevus is a small, dark spot on the skin. It can be either composed of melanin, or a pigmented growth on the skin, formed mostly of melanocytes. The high concentration of melanin is responsible for their dark color. They are a member of the family of skin lesions known as naevi.
Moles may either be present at birth or develop later in life. Acquired moles are a form of benign neoplasm, while congenital moles are considered a minor malformation, or hamartoma. Moles are most often of no medical consequence, but since they are permanent, removal may be performed for cosmetic or other reasons. Moles are usually circular or oval and not very large. Most children are born with moles, and almost everyone has at least one or two moles on their bodies. Large amounts can be concentrated on the back, chest, and arms.
Some scientists suspect that overexposure to ultraviolet light including excessive sunlight may play a role in the formation of acquired moles, but more research is needed in this area.
Dysplastic nevi or atypical mole syndrome is a hereditary condition which causes the person to have a large quantity of moles often 100 or more with some of them larger than normal and/or atypical. This leads to a higher risk of melanoma, a serious skin cancer. A slight majority of melanomas do not form in an existing mole, but rather create a new growth on the skin. Nevertheless, those with dysplastic nevi are at a higher risk of even this type of melanoma. Such persons need to be checked regularly for any changes in their moles and to note any new ones.
2007-01-24 00:41:07
·
answer #1
·
answered by Briand K 2
·
0⤊
0⤋
Remove Your Moles, Warts & Skin Tags in 3 Days Easily, Naturally And Without Surgery
2016-05-24 03:55:29
·
answer #2
·
answered by Anonymous
·
0⤊
0⤋
I don't know where they come from, I just know that they should be removed as they can turn into cancer.
2007-01-24 00:52:46
·
answer #3
·
answered by poutine 4
·
0⤊
0⤋