Signs & Symptoms of Melanoma Skin Cancer
Melanoma occurs when cancer develops in the melanocyte cells that produce the skin's pigment. Although the least common type of skin cancer, melanoma is also the most dangerous form because it causes the most deaths.
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Melanomas
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Melanomas are skin tumors, most often found on body parts with previous exposure to ultraviolet (UV) radiation from the sun or tanning appliances. They can also develop in areas with little or no UV exposure.
Moles
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Many melanomas appear suddenly or develop from existing normal moles. In both cases, the A-B-C-D-E guide represents common characteristics: asymmetrical shape, irregular border, multiple colors, large diameter (6 mm. or more) and evolving appearance.
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Eye Melanomas
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Ocular melanomas can develop in cells of the retina that contain pigment, the eyelid's lining and the layer of the eyeball that contains pigment. The first often lacks symptoms, while the last two may produce irritation or vision with dark spots.
Nail Melanomas
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Melanomas beneath the nail are more common among people with darker pigmentation. They look like black or brown bruises and may grow bigger or spread to the cuticle.
Other Melanomas
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Melanomas in the digestive and urinary tracts, mouth and vagina can cause bleeding and itching, both symptoms of other common conditions, which makes detecting the melanomas difficult.
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