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50.8 MB (2.2 MB compressed)
3375 x 5259 pixels
28.4 x 44.5 cm ⏐ 11.2 x 17.5 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
X-ray (blue tint) of the thoracic spine of a woman suffering from osteoporosis, showing vertebral collapse. Osteoporosis is a reduction in the mass of bone causing an increase in brittleness and a greater risk of fractures, particularly of the vertebrae, hip or arm. The condition arises through an imbalance between formation & resorption of bone, most commonly occurring with increasing age. The incidence is greater in women than in men and is attributed to a decline in hormone production following the menopause. Oestrogens (sex hormones) may be used to prevent & treat age-related disease, although their use is controversial.
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