DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Haematoma (swelling) on the shin of a 68 year old man eight weeks after a blow with a blunt object. A haematoma is an accumulation of clotted blood caused by internal bleeding or bruising. Large painful haematomas may be surgically drained, but most clear naturally within a few days.
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