GUNILLA ELAM / SCIENCE PHOTO LIBRARY GUNILLA ELAM / SCIENCE PHOTO LIBRARY
Illustration of a malignant (cancerous) melanoma cells (blue) amongst normal cells (pink). This cancer arises from the skin's melanocytes, the cells that produce the pigment (melanin) that gives skin its colour. It is an aggressive cancer that often spreads (metastasises) to other tissues and the prognosis is poor.
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