JOHN T. ALESI / SCIENCE PHOTO LIBRARY JOHN T. ALESI / SCIENCE PHOTO LIBRARY
Cortisone injections. Artwork illustrating the injection of cortisone in the left and right shoulders. Cortisone is a steroid hormone. It is used to treat a variety of ailments by suppressing the immune system, thus reducing inflammation, pain and swelling at the injury site. Typical shoulder injuries would be to the muscles and tendons of the joint.
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