STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Pancreatic cancer cells. Coloured scanning electron micrograph (SEM) of pancreatic cancer cells. Pancreatic cancer often causes no symptoms until it is well established and untreatable. The cellular processes seen here allow the cells to move. They may clump to form tumours and invade surrounding tissue (metastasis).
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