skin disorders
Moles
Atypical moles
Atypical moles are noncancerous (benign) Moles that have an abnormal appearance compared to that of typical moles. People who have atypical moles have an increased risk of developing Melanoma , which is cancer of the pigment-producing cells in the skin called melanocytes. The risk of developing melanoma increases when the number of moles increases. Risk also increases in people who spend a lot of time in the sun. The tendency to grow atypical moles can be hereditary, as in familial atypical multiple mole–melanoma syndrome. In this disorder, many atypical moles and melanoma occur in 2 or more first-degree relatives (such as a parent, sibling, or child), and family members have a greater risk of developing melanoma. Atypical moles tend to be multicolored, usually in tones of brown and tan against a lighter background; asymmetric; and to have irregular shapes and borders. They are often larger than (more than ¼ inch [about 6 millimeters] wide) most normal moles. Atypical moles most commonly appear on sun-exposed skin but may occur on covered areas (such as the buttocks, breasts, or scalp). Physical examination Biopsy People who have a family history of melanoma should have their skin checked by a dermatologist (a doctor who specializes in skin disorders) and learn about signs of melanoma. People who have had a melanoma should have their skin checked regularly by a dermatologist. Some dermatologists closely inspect the skin using a hand-held instrument (a procedure called dermoscopy) to see structures in the mole that are not visible to the naked eye and that may indicate that melanoma is more or less likely. Dermatologists may remove some atypical moles and examine them under a microscope ( Biopsy ). Self-examination Photographs of moles Sun protection People with atypical moles must regularly look for new moles and any Diagnosis in existing moles that might indicate melanoma. To help monitor such changes, they and their dermatologist may take full-body color photographs over time. Atypical moles that change may sometimes be removed. Skin damage caused by ultraviolet (UV) radiation from the sun is a cause of melanoma, particularly recreational sun exposure and sunburns. To limit damage caused by UV radiation, people should Avoidance during peak hours (about 10 AM to 4 PM) when possible, Sometimes removal People who have an atypical mole or a mole that is new or changing should be evaluated by a dermatologist, who will determine whether the mole should be removed. Removing all atypical moles does not prevent melanoma. 