Bone disease. Frontal X-ray of the right thigh bone (femur) of a 60 year old woman, which is suggestive of Erdheim-Chester disease. This is a rare dis

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Bone disease. Frontal X-ray of the right thigh bone (femur) of a 60 year old woman, which is suggestive of Erdheim-Chester disease. This is a rare disease where there is an abnormal multiplication of histiocytes, a type of white blood cell. It can present with bone pain, visual field loss and pituitary failure. Prognosis is approximately two years from diagnosis. Treatment options include chemotherapy and radiotherapy.

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Photo credit: © ZEPHYR/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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