SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY
Coloured X-ray in front view of the arm (humerus) of a young patient, showing a fracture together with a bone cyst (orange, at upper frame). The cyst, which has one cavity (unicameral), has a thin wall and contains blood. The cyst has formed due to injury of the arm.
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