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melanoma skin cancer sign: colour variation

a mole of uniform colour and a mole showing colour variation

melanoma is the most serious type of skin cancer. the most important warning sign of melanoma is a change in the size, shape, or colour of a mole or other skin growth, such as a birthmark.

  • colour variation is one thing to watch for. call your doctor if you notice that:
    • the colour of a mole or other skin growth is not uniform. shades of tan, brown, and black may be present. dashes of red, white, and blue may add to the mottled appearance.
    • colour has spread from the edge of a mole into the surrounding skin.

current as of: october 25, 2023

author: healthwise staff
clinical review board
all healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

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