Cancer can develop in the cells of the skin and so skin cancers are named after the type of cell from which they start.
Basal cell cancer and squamous cell cancer are the two most common types of skin cancer. They are sometimes called non-melanoma skin cancer because they don't develop from melanocytic cells.
Basal cell cancer (BCC)
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70-85% of all skin cancers Most common in people aged over 40 Slow growing Red, pale or pearly in colour Usually appear on the head, neck and upper body Can grow deeper into the skin |
Squamous cell cancer (SCC)

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15-20% of all skin cancers Most common in people aged over 50 Faster growing Thickened red, scaly spot Usually appear on the head, neck, hands and forearms Can spread to other parts of the body |
Melanoma

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5% of skin cancer cases The most serious, but can be treated successfully when diagnosed early New spot, or existing freckle or mole may change in size, shape or colour Irregular edge or surface, blotchy with brown, black, blue, red, white or light grey colour. May itch or bleed |
Other spots
Other spots that aren't skin cancers can also appear. They are warning signs that your skin has received too much sun and you may be more prone to melanoma. |
Solar keratoses (sun spots)

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Usually occur in people aged over 40 Appear on areas of skin exposed to the sun, such as the head, neck, arms and legs Flattish, red scaly patches that may sting if scratched. |
Dysplastic naevi

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Flat, fairly large moles Have an irregular shape and an uneven colour |