ORKAN, ISM / SCIENCE PHOTO LIBRARY ORKAN, ISM / SCIENCE PHOTO LIBRARY
Osteoid osteoma. X-ray of the jaw of a 14-year-old patient with an osteoid osteoma of the mandible (lower jaw). This benign (non-cancerous) bone tumour arises from osteoblast bone cells and tend to be less than 1.5 cm in size. They can occur in any bone in the body but are more common in long bones, such as those in the leg.
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