DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
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Synovial cyst. Close-up of a large synovial cyst on a patient's finger. Synovial cysts are filled with synovial fluid from the joint. Most synovial cysts are painless, but movement of the joint may be restricted. Treatment involves draining the cyst and removing it.
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