The layer nearest the surface is known as the epidermis and the layer underneath this is known as the dermis. Malignant melanoma is one of many types of skin cancer . It develops in cells known as melanocytes. These are cells which normally lie in the lower part of the epidermis and produce a pigment called melanin. Melanin is responsible for the colour of our skin.
Moles are examples of lots of melanocytes that have been grouped together.
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