SIMON FRASER, ROYAL VICTORIA INFIRMARY / SCIENCE PHOTO LIBRARY SIMON FRASER, ROYAL VICTORIA INFIRMARY / SCIENCE PHOTO LIBRARY
Osteoarthritis of knee. Colour Magnetic Resonance Imaging (MRI) scan of a side view of the knee joint of a 33 year old male with osteoarthritis. The lower end of the femur (thigh bone) is at centre (blue); it articulates with the upper end of the tibia (shin bone) at lower centre (blue). The patella kneecap is at centre left. Due to osteoarthritis the end of the femur is eroded and jagged; cracks causing weakening in both bones are also visible. Osteoarthritis is the most common type of arthritis due mainly to wear and tear on joints largely affecting the elderly. This patient had haemophilia which is a factor in arthritis.
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