DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Bruised buttock. Close-up of a haematoma (bruise) on the buttock of a 90 year old man after a fall. A haematoma is a localised collection of blood caused by bleeding from a ruptured blood vessel. Most haematomas disappear without treatment after several days.
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