Common nevi
Common or acquired nevi are moles that develop after a person is born. Most commonly they appear on fair-skinned individuals. Common moles are symmetrical, round or oval in shape, less than 6 millimeters in diameter, and have brown, even pigmentation. Having 10 to 40 of acquired nevi is quite common, but having more than 50 puts individuals at a greater chance for developing melanoma.
Congenital nevi
According to the AAD, about 1 in 100 people are born with a mole. These are called congenital nevi. Congenital moles can vary in size and often grow as the person grows. Most congenital nevi pose no health risk, but the larger in size they are, the greater the risk they pose for developing melanoma.
Atypical dysplastic nevi
Atypical nevi, or dysplastic nevi, are often described as being on a continuum between common moles and melanoma. To the naked eye, it can be difficult to determine the difference between a dysplastic nevus and a melanoma. A dermatologist will use a dermatoscope to assess these types of moles. Often, skin biopsies are performed to test the mole for atypia.
When Should I See A Dermatologist ?
When we talk about suspicious moles, we often refer to the ABCDE checklist.
If you have any moles with these symptoms, you need to schedule an appointment with a dermatology professional.
