HANS-ULRICH OSTERWALDER / SCIENCE PHOTO LIBRARY HANS-ULRICH OSTERWALDER / SCIENCE PHOTO LIBRARY
Tumour growth. Computer artwork depicting the early stage of a tumour growth, next to an image depicting the same tumour at a later stage of growth. Most tumours are thought to originate from a single cell that begins to divide uncontrollably. This is caused by genetic changes. Further genetic changes may cause the resulting growth to become malignant, invading surrounding tissues.
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