DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Tumour excision scar on the thigh of a 61-year-old woman. The scar formed after the surgical removal of a lipoma, a benign fat tumour. Benign tumours can be removed if they become too large. A scar is an area of tissue formed when the body repairs a wound. To heal the wound, the body increases the production of collagen, a tough fibrous protein, to form connective tissue over the wound. This forms the red line seen here.
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