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Macmillan and Cancerbackup merged in 2008. Together we provide free, high quality information for people affected by cancer through our publications, website and phone service. Find out more|.
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This section gives information about melanoma that is 1mm and thicker in depth
The main risk factor for melanoma 1mm and over is exposure to ultraviolet (UV) light
The skin is divided into two main layers - the epidermis and the dermis.
There are four main types of skin (cutaneous) melanoma.
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