FRANCOIS L'HOPITAL, ISM / SCIENCE PHOTO LIBRARY FRANCOIS L'HOPITAL, ISM / SCIENCE PHOTO LIBRARY
Lipoma in the colon, endoscope view. A lipoma is a benign tumour that forms from fat cells. Lipomas are most common in the skin, and are rare in the intestinal tract. A large lipoma can obstruct the passage of digested food through the intestine, requiring the surgical removal of the tumour. In rare cases a lipoma may turn cancerous, when it is termed a liposarcoma.
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