ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Computer artwork depicting laser treatment of a malignant (cancerous) tumour cell. These tumour cells promote the formation of new blood vessels, a process known as angiogenesis. The tumour cells release angiogenic growth factor proteins that bind to endothelial cells in nearby blood vessels and encourage the growth of new blood vessels from the existing ones. These blood vessels provide the tumour with oxygen and nutrients.
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