ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Osteoarthritis of the knee. Coloured 3D computed tomography (CT) scans comparing the healthy right knee (left) of a 71-year-old patient with the left knee (right) affected by severe osteoarthritis of the femora-patellar surfaces (highlighted, upper left). Osteoarthritis (or arthrosis) is a common degenerative disease characterised by a loss of the cartilage that lines the joints between bones. This leads to pain, swelling and occasionally may result in the loss of function of the affected joint. No specific cure exists but symptoms may be relieved through analgesic drugs and physiotherapy. Joint-replacement surgery is used in some of the most severe cases.
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