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Lipoma from the colon. Clinical specimen of a lipoma that was removed from the sigmoid portion of the colon (part of the large intestine). 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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