ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Slipped disc. Coloured frontal computed tomography (CT) scan of a section through the lumbar spine of a 53-year-old patient with severe right sciatica caused by a slipped (herniated) spinal disc (centre) between the L4-L5 vertebrae. Sciatica is pain that extends from the lower back down the leg.
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