DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Surgical scar. Wrist and hand of a 79 year old man showing a scar from surgery to correct carpal tunnel syndrome. This is a condition characterised by numbness, tingling and pain in the thumb and first two fingers. It is caused by the median nerve from the arm being trapped as it enters the hand through the carpal tunnel, a gap in the bones and ligaments in the wrist. The syndrome usually disappears naturally, or after a course of corticosteroid anti-inflammatory drugs. If these fail, however, the ligament which is trapping the nerve may be surgically cut, as here.
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